./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:21:39,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:21:39,283 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:21:39,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:21:39,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:21:39,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:21:39,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:21:39,315 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:21:39,316 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:21:39,319 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:21:39,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:21:39,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:21:39,320 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:21:39,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:21:39,321 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:21:39,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:21:39,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:21:39,321 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:21:39,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:21:39,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:21:39,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:21:39,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:21:39,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:21:39,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:21:39,324 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:21:39,324 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:21:39,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:21:39,324 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:21:39,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:21:39,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:21:39,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:21:39,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:21:39,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:21:39,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:21:39,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:21:39,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:21:39,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:21:39,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:21:39,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:21:39,328 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:21:39,328 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:21:39,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:21:39,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:21:39,328 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:21:39,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:21:39,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:21:39,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:21:39,522 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:21:39,522 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:21:39,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i [2024-06-03 19:21:40,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:21:40,817 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:21:40,824 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i [2024-06-03 19:21:40,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a33d5944/9e3aa27051d24f569f88a0100b3fe20a/FLAGf15b5f9c3 [2024-06-03 19:21:40,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a33d5944/9e3aa27051d24f569f88a0100b3fe20a [2024-06-03 19:21:40,860 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:21:40,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:21:40,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml [2024-06-03 19:21:41,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:21:41,034 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:21:41,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:21:41,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:21:41,038 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:21:41,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:21:40" (1/2) ... [2024-06-03 19:21:41,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de0f1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:41, skipping insertion in model container [2024-06-03 19:21:41,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:21:40" (1/2) ... [2024-06-03 19:21:41,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@766f23a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:41, skipping insertion in model container [2024-06-03 19:21:41,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:41" (2/2) ... [2024-06-03 19:21:41,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de0f1f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41, skipping insertion in model container [2024-06-03 19:21:41,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:41" (2/2) ... [2024-06-03 19:21:41,042 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:21:41,183 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:21:41,184 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-03 19:21:41,184 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-03 19:21:41,185 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-03 19:21:41,185 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-03 19:21:41,185 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:21:41,186 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-03 19:21:41,224 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:21:41,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:21:41,514 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:21:41,636 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:21:41,668 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:21:41,668 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41 WrapperNode [2024-06-03 19:21:41,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:21:41,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:21:41,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:21:41,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:21:41,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,735 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-03 19:21:41,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:21:41,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:21:41,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:21:41,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:21:41,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,756 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,773 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:21:41,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:21:41,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:21:41,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:21:41,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:21:41,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (1/1) ... [2024-06-03 19:21:41,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:21:41,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:21:41,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:21:41,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:21:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:21:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:21:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:21:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:21:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:21:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:21:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:21:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:21:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:21:41,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:21:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:21:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:21:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:21:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:21:41,880 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:21:42,023 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:21:42,025 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:21:42,330 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:21:42,330 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:21:42,440 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:21:42,440 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:21:42,441 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:21:42 BoogieIcfgContainer [2024-06-03 19:21:42,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:21:42,442 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:21:42,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:21:42,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:21:42,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:21:40" (1/4) ... [2024-06-03 19:21:42,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689ec592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:21:42, skipping insertion in model container [2024-06-03 19:21:42,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:41" (2/4) ... [2024-06-03 19:21:42,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689ec592 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:21:42, skipping insertion in model container [2024-06-03 19:21:42,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:41" (3/4) ... [2024-06-03 19:21:42,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689ec592 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:21:42, skipping insertion in model container [2024-06-03 19:21:42,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:21:42" (4/4) ... [2024-06-03 19:21:42,446 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_power.opt_rmo.opt.i [2024-06-03 19:21:42,458 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:21:42,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:21:42,459 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:21:42,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:21:42,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:21:42,571 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:21:42,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:21:42,572 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 82 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:21:42,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:21:42,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:21:42,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:21:42,603 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;@1b122ef1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:21:42,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:21:42,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:21:42,607 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:21:42,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:21:42,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:42,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:21:42,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:42,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -745803582, now seen corresponding path program 1 times [2024-06-03 19:21:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:42,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7776315] [2024-06-03 19:21:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7776315] [2024-06-03 19:21:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7776315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:43,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:43,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:21:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855172461] [2024-06-03 19:21:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:21:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:21:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:21:43,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-03 19:21:43,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:43,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-03 19:21:43,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:44,704 INFO L124 PetriNetUnfolderBase]: 5292/7737 cut-off events. [2024-06-03 19:21:44,704 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-03 19:21:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15280 conditions, 7737 events. 5292/7737 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44795 event pairs, 3846 based on Foata normal form. 1/7479 useless extension candidates. Maximal degree in co-relation 15264. Up to 7274 conditions per place. [2024-06-03 19:21:44,750 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:21:44,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-03 19:21:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:21:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:21:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-03 19:21:44,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-03 19:21:44,761 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-03 19:21:44,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-03 19:21:44,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:44,766 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:21:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:21:44,770 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:21:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:21:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:44,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:44,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:44,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:21:44,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:44,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash 542328225, now seen corresponding path program 1 times [2024-06-03 19:21:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652748161] [2024-06-03 19:21:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652748161] [2024-06-03 19:21:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652748161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:21:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747092291] [2024-06-03 19:21:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:21:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:21:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:21:45,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:21:45,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:45,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:45,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:21:45,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:46,572 INFO L124 PetriNetUnfolderBase]: 6187/8778 cut-off events. [2024-06-03 19:21:46,572 INFO L125 PetriNetUnfolderBase]: For 1776/1776 co-relation queries the response was YES. [2024-06-03 19:21:46,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20007 conditions, 8778 events. 6187/8778 cut-off events. For 1776/1776 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 49356 event pairs, 3871 based on Foata normal form. 4/8777 useless extension candidates. Maximal degree in co-relation 19992. Up to 8444 conditions per place. [2024-06-03 19:21:46,629 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:21:46,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-03 19:21:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:21:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:21:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-03 19:21:46,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132075471698113 [2024-06-03 19:21:46,631 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 130 transitions. [2024-06-03 19:21:46,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-03 19:21:46,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:21:46,634 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:21:46,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-03 19:21:46,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:21:46,635 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:21:46,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:46,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:46,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:46,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:21:46,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:46,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1165759002, now seen corresponding path program 1 times [2024-06-03 19:21:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500089288] [2024-06-03 19:21:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:46,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500089288] [2024-06-03 19:21:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500089288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:47,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:21:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105931450] [2024-06-03 19:21:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:21:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:21:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:21:47,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:21:47,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:21:47,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:48,901 INFO L124 PetriNetUnfolderBase]: 7856/11058 cut-off events. [2024-06-03 19:21:48,901 INFO L125 PetriNetUnfolderBase]: For 6016/6016 co-relation queries the response was YES. [2024-06-03 19:21:48,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27978 conditions, 11058 events. 7856/11058 cut-off events. For 6016/6016 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61120 event pairs, 3834 based on Foata normal form. 8/11058 useless extension candidates. Maximal degree in co-relation 27961. Up to 10612 conditions per place. [2024-06-03 19:21:48,951 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-03 19:21:48,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 488 flow [2024-06-03 19:21:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 19:21:48,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-06-03 19:21:48,953 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 181 transitions. [2024-06-03 19:21:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 488 flow [2024-06-03 19:21:48,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 460 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:48,957 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-03 19:21:48,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 19:21:48,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-03 19:21:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-03 19:21:48,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:48,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:48,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:21:48,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:48,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1686523862, now seen corresponding path program 1 times [2024-06-03 19:21:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528609911] [2024-06-03 19:21:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:49,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528609911] [2024-06-03 19:21:49,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528609911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:49,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:49,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:21:49,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196351166] [2024-06-03 19:21:49,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:49,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:21:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:21:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:21:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:21:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:21:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:51,129 INFO L124 PetriNetUnfolderBase]: 6688/9742 cut-off events. [2024-06-03 19:21:51,129 INFO L125 PetriNetUnfolderBase]: For 9778/9778 co-relation queries the response was YES. [2024-06-03 19:21:51,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26935 conditions, 9742 events. 6688/9742 cut-off events. For 9778/9778 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 55836 event pairs, 3462 based on Foata normal form. 6/9601 useless extension candidates. Maximal degree in co-relation 26916. Up to 9117 conditions per place. [2024-06-03 19:21:51,175 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-03 19:21:51,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 451 flow [2024-06-03 19:21:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:21:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:21:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 19:21:51,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-03 19:21:51,177 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 137 transitions. [2024-06-03 19:21:51,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 451 flow [2024-06-03 19:21:51,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:51,184 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-03 19:21:51,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:21:51,185 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:21:51,185 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-03 19:21:51,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:51,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:51,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:51,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:21:51,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:51,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 393153169, now seen corresponding path program 1 times [2024-06-03 19:21:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:51,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023332369] [2024-06-03 19:21:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:51,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:52,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023332369] [2024-06-03 19:21:52,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023332369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:52,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:52,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506016083] [2024-06-03 19:21:52,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:52,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:52,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:52,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:21:52,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:52,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:52,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:21:52,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:53,537 INFO L124 PetriNetUnfolderBase]: 7882/11136 cut-off events. [2024-06-03 19:21:53,537 INFO L125 PetriNetUnfolderBase]: For 18001/18001 co-relation queries the response was YES. [2024-06-03 19:21:53,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33840 conditions, 11136 events. 7882/11136 cut-off events. For 18001/18001 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61507 event pairs, 3908 based on Foata normal form. 6/11136 useless extension candidates. Maximal degree in co-relation 33819. Up to 10604 conditions per place. [2024-06-03 19:21:53,611 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-03 19:21:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 616 flow [2024-06-03 19:21:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-03 19:21:53,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-03 19:21:53,613 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 168 transitions. [2024-06-03 19:21:53,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 616 flow [2024-06-03 19:21:53,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 587 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:53,618 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-03 19:21:53,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-03 19:21:53,623 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-03 19:21:53,624 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-03 19:21:53,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:53,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:53,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:53,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:21:53,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:53,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1526159465, now seen corresponding path program 2 times [2024-06-03 19:21:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:53,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546232363] [2024-06-03 19:21:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546232363] [2024-06-03 19:21:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546232363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:54,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:54,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228279107] [2024-06-03 19:21:54,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:54,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:54,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:21:54,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:54,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:54,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:21:54,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:56,139 INFO L124 PetriNetUnfolderBase]: 7864/11116 cut-off events. [2024-06-03 19:21:56,140 INFO L125 PetriNetUnfolderBase]: For 26495/26503 co-relation queries the response was YES. [2024-06-03 19:21:56,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36615 conditions, 11116 events. 7864/11116 cut-off events. For 26495/26503 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61483 event pairs, 3904 based on Foata normal form. 12/11123 useless extension candidates. Maximal degree in co-relation 36593. Up to 10589 conditions per place. [2024-06-03 19:21:56,201 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 66 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-03 19:21:56,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 594 flow [2024-06-03 19:21:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:21:56,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062893081761006 [2024-06-03 19:21:56,203 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:21:56,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 594 flow [2024-06-03 19:21:56,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 548 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:56,214 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-03 19:21:56,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-03 19:21:56,217 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-03 19:21:56,217 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-03 19:21:56,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:56,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:56,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:56,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:21:56,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:56,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 49456085, now seen corresponding path program 1 times [2024-06-03 19:21:56,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073154633] [2024-06-03 19:21:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073154633] [2024-06-03 19:21:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073154633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:57,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:57,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715654829] [2024-06-03 19:21:57,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:57,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:21:57,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:57,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:57,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:21:57,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:58,849 INFO L124 PetriNetUnfolderBase]: 7977/11292 cut-off events. [2024-06-03 19:21:58,849 INFO L125 PetriNetUnfolderBase]: For 30625/30629 co-relation queries the response was YES. [2024-06-03 19:21:58,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37638 conditions, 11292 events. 7977/11292 cut-off events. For 30625/30629 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 62465 event pairs, 4108 based on Foata normal form. 10/11299 useless extension candidates. Maximal degree in co-relation 37614. Up to 10759 conditions per place. [2024-06-03 19:21:58,924 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 89 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-03 19:21:58,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 826 flow [2024-06-03 19:21:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:21:58,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-03 19:21:58,925 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:21:58,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 826 flow [2024-06-03 19:21:58,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 752 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:58,944 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-03 19:21:58,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-03 19:21:58,945 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-03 19:21:58,945 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-03 19:21:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:58,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:58,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:21:58,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:58,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1698814165, now seen corresponding path program 2 times [2024-06-03 19:21:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:58,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097831971] [2024-06-03 19:21:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097831971] [2024-06-03 19:21:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097831971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:59,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:59,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670520810] [2024-06-03 19:21:59,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:00,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:00,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:00,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:00,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:00,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:01,753 INFO L124 PetriNetUnfolderBase]: 8021/11361 cut-off events. [2024-06-03 19:22:01,754 INFO L125 PetriNetUnfolderBase]: For 41746/41754 co-relation queries the response was YES. [2024-06-03 19:22:01,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40956 conditions, 11361 events. 8021/11361 cut-off events. For 41746/41754 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63019 event pairs, 4014 based on Foata normal form. 14/11365 useless extension candidates. Maximal degree in co-relation 40930. Up to 10781 conditions per place. [2024-06-03 19:22:01,833 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 89 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-03 19:22:01,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 931 flow [2024-06-03 19:22:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:22:01,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:22:01,838 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:22:01,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 931 flow [2024-06-03 19:22:01,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 873 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:01,866 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-03 19:22:01,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-03 19:22:01,868 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-03 19:22:01,868 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-03 19:22:01,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:01,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:01,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:22:01,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1698934135, now seen corresponding path program 3 times [2024-06-03 19:22:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:01,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845945326] [2024-06-03 19:22:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:01,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:02,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845945326] [2024-06-03 19:22:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845945326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562533258] [2024-06-03 19:22:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:03,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:03,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:03,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:03,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:03,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:04,756 INFO L124 PetriNetUnfolderBase]: 8065/11446 cut-off events. [2024-06-03 19:22:04,756 INFO L125 PetriNetUnfolderBase]: For 54762/54764 co-relation queries the response was YES. [2024-06-03 19:22:04,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44158 conditions, 11446 events. 8065/11446 cut-off events. For 54762/54764 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63457 event pairs, 3660 based on Foata normal form. 6/11446 useless extension candidates. Maximal degree in co-relation 44131. Up to 10650 conditions per place. [2024-06-03 19:22:04,814 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-03 19:22:04,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 140 transitions, 1120 flow [2024-06-03 19:22:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-03 19:22:04,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-03 19:22:04,816 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 196 transitions. [2024-06-03 19:22:04,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 140 transitions, 1120 flow [2024-06-03 19:22:04,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 140 transitions, 1001 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:04,837 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-03 19:22:04,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-03 19:22:04,838 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-03 19:22:04,838 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-03 19:22:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:04,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:04,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:04,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:22:04,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:04,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash -66301675, now seen corresponding path program 4 times [2024-06-03 19:22:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:04,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600325171] [2024-06-03 19:22:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600325171] [2024-06-03 19:22:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600325171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:05,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161248216] [2024-06-03 19:22:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:05,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:05,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:05,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:07,362 INFO L124 PetriNetUnfolderBase]: 8047/11424 cut-off events. [2024-06-03 19:22:07,362 INFO L125 PetriNetUnfolderBase]: For 55666/55671 co-relation queries the response was YES. [2024-06-03 19:22:07,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44023 conditions, 11424 events. 8047/11424 cut-off events. For 55666/55671 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63212 event pairs, 3668 based on Foata normal form. 6/11418 useless extension candidates. Maximal degree in co-relation 43995. Up to 10635 conditions per place. [2024-06-03 19:22:07,445 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 50 changer transitions 0/134 dead transitions. [2024-06-03 19:22:07,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 1052 flow [2024-06-03 19:22:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:22:07,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:22:07,447 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:22:07,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 1052 flow [2024-06-03 19:22:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 969 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:07,483 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-03 19:22:07,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-03 19:22:07,484 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-03 19:22:07,484 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-03 19:22:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:07,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:07,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:07,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:22:07,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:07,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -703284901, now seen corresponding path program 1 times [2024-06-03 19:22:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:07,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108836760] [2024-06-03 19:22:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:08,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:08,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108836760] [2024-06-03 19:22:08,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108836760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:08,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:08,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005591224] [2024-06-03 19:22:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:08,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:08,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:08,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:08,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:10,267 INFO L124 PetriNetUnfolderBase]: 6882/9983 cut-off events. [2024-06-03 19:22:10,267 INFO L125 PetriNetUnfolderBase]: For 53268/53270 co-relation queries the response was YES. [2024-06-03 19:22:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39311 conditions, 9983 events. 6882/9983 cut-off events. For 53268/53270 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 56847 event pairs, 3125 based on Foata normal form. 6/9872 useless extension candidates. Maximal degree in co-relation 39281. Up to 9354 conditions per place. [2024-06-03 19:22:10,334 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 113 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-03 19:22:10,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1149 flow [2024-06-03 19:22:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 19:22:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-03 19:22:10,336 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 188 transitions. [2024-06-03 19:22:10,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1149 flow [2024-06-03 19:22:10,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1008 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:10,360 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-03 19:22:10,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-03 19:22:10,361 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-03 19:22:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-03 19:22:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:10,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:10,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:22:10,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:10,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash 781674407, now seen corresponding path program 1 times [2024-06-03 19:22:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760739659] [2024-06-03 19:22:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:11,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760739659] [2024-06-03 19:22:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760739659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:11,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:11,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:22:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005201640] [2024-06-03 19:22:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:22:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:22:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:22:11,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:22:11,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:11,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:11,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:22:11,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:12,416 INFO L124 PetriNetUnfolderBase]: 6461/9937 cut-off events. [2024-06-03 19:22:12,416 INFO L125 PetriNetUnfolderBase]: For 61419/61436 co-relation queries the response was YES. [2024-06-03 19:22:12,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40293 conditions, 9937 events. 6461/9937 cut-off events. For 61419/61436 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61651 event pairs, 3176 based on Foata normal form. 17/9904 useless extension candidates. Maximal degree in co-relation 40261. Up to 8823 conditions per place. [2024-06-03 19:22:12,485 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 101 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-03 19:22:12,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1007 flow [2024-06-03 19:22:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:22:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:22:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-03 19:22:12,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-03 19:22:12,488 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 136 transitions. [2024-06-03 19:22:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1007 flow [2024-06-03 19:22:12,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 947 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:12,521 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-03 19:22:12,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-03 19:22:12,522 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-03 19:22:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-03 19:22:12,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:12,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:12,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:12,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:22:12,522 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:12,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1423461336, now seen corresponding path program 1 times [2024-06-03 19:22:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:12,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363356276] [2024-06-03 19:22:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:12,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363356276] [2024-06-03 19:22:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363356276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972754962] [2024-06-03 19:22:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:13,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:13,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:13,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:13,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:13,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:15,411 INFO L124 PetriNetUnfolderBase]: 8386/11981 cut-off events. [2024-06-03 19:22:15,411 INFO L125 PetriNetUnfolderBase]: For 95396/95404 co-relation queries the response was YES. [2024-06-03 19:22:15,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52988 conditions, 11981 events. 8386/11981 cut-off events. For 95396/95404 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 67632 event pairs, 3209 based on Foata normal form. 32/11989 useless extension candidates. Maximal degree in co-relation 52955. Up to 10819 conditions per place. [2024-06-03 19:22:15,614 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 41 changer transitions 0/180 dead transitions. [2024-06-03 19:22:15,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 180 transitions, 1428 flow [2024-06-03 19:22:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-03 19:22:15,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519916142557652 [2024-06-03 19:22:15,616 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 9 states and 248 transitions. [2024-06-03 19:22:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 180 transitions, 1428 flow [2024-06-03 19:22:15,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 180 transitions, 1385 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:15,663 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 846 flow [2024-06-03 19:22:15,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=846, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-03 19:22:15,664 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-03 19:22:15,664 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 846 flow [2024-06-03 19:22:15,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:15,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:15,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:15,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:22:15,665 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:15,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 47247472, now seen corresponding path program 2 times [2024-06-03 19:22:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516754685] [2024-06-03 19:22:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:15,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516754685] [2024-06-03 19:22:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516754685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:16,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942440697] [2024-06-03 19:22:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:16,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:18,543 INFO L124 PetriNetUnfolderBase]: 8317/11896 cut-off events. [2024-06-03 19:22:18,544 INFO L125 PetriNetUnfolderBase]: For 108624/108632 co-relation queries the response was YES. [2024-06-03 19:22:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54192 conditions, 11896 events. 8317/11896 cut-off events. For 108624/108632 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 66917 event pairs, 3771 based on Foata normal form. 38/11924 useless extension candidates. Maximal degree in co-relation 54158. Up to 11001 conditions per place. [2024-06-03 19:22:18,635 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 122 selfloop transitions, 36 changer transitions 0/166 dead transitions. [2024-06-03 19:22:18,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 166 transitions, 1342 flow [2024-06-03 19:22:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-03 19:22:18,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-03 19:22:18,637 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 846 flow. Second operand 8 states and 217 transitions. [2024-06-03 19:22:18,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 166 transitions, 1342 flow [2024-06-03 19:22:18,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 166 transitions, 1273 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:18,710 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 861 flow [2024-06-03 19:22:18,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-03 19:22:18,710 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-03 19:22:18,710 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 861 flow [2024-06-03 19:22:18,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:18,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:18,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:18,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:22:18,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:18,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash 51716122, now seen corresponding path program 3 times [2024-06-03 19:22:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:18,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309173093] [2024-06-03 19:22:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:19,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309173093] [2024-06-03 19:22:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309173093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:19,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168198833] [2024-06-03 19:22:19,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:19,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:19,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 861 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:19,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:19,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:19,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:21,647 INFO L124 PetriNetUnfolderBase]: 8481/12143 cut-off events. [2024-06-03 19:22:21,647 INFO L125 PetriNetUnfolderBase]: For 121097/121102 co-relation queries the response was YES. [2024-06-03 19:22:21,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 12143 events. 8481/12143 cut-off events. For 121097/121102 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 68549 event pairs, 3509 based on Foata normal form. 30/12168 useless extension candidates. Maximal degree in co-relation 56257. Up to 11087 conditions per place. [2024-06-03 19:22:21,743 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 102 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-03 19:22:21,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1381 flow [2024-06-03 19:22:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-03 19:22:21,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-03 19:22:21,745 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 861 flow. Second operand 8 states and 221 transitions. [2024-06-03 19:22:21,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1381 flow [2024-06-03 19:22:21,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 165 transitions, 1299 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:21,825 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 945 flow [2024-06-03 19:22:21,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=945, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-03 19:22:21,825 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-03 19:22:21,825 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 945 flow [2024-06-03 19:22:21,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:21,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:21,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:21,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:22:21,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:21,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash 588364464, now seen corresponding path program 1 times [2024-06-03 19:22:21,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015457903] [2024-06-03 19:22:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:21,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015457903] [2024-06-03 19:22:22,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015457903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:22,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398567318] [2024-06-03 19:22:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:23,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:23,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:23,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:23,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:23,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:24,760 INFO L124 PetriNetUnfolderBase]: 8517/12179 cut-off events. [2024-06-03 19:22:24,760 INFO L125 PetriNetUnfolderBase]: For 137735/137746 co-relation queries the response was YES. [2024-06-03 19:22:24,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58322 conditions, 12179 events. 8517/12179 cut-off events. For 137735/137746 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68852 event pairs, 3587 based on Foata normal form. 14/12186 useless extension candidates. Maximal degree in co-relation 58285. Up to 11497 conditions per place. [2024-06-03 19:22:24,856 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 126 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-03 19:22:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1496 flow [2024-06-03 19:22:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:22:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-03 19:22:24,858 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 945 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:22:24,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1496 flow [2024-06-03 19:22:24,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1366 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:24,941 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 988 flow [2024-06-03 19:22:24,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-03 19:22:24,942 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-03 19:22:24,942 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 988 flow [2024-06-03 19:22:24,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:24,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:24,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:22:24,943 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:24,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -441569338, now seen corresponding path program 1 times [2024-06-03 19:22:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:24,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493435036] [2024-06-03 19:22:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:24,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:25,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493435036] [2024-06-03 19:22:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493435036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:25,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:25,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797414450] [2024-06-03 19:22:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:25,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:25,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:25,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:25,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 988 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:25,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:25,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:25,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:27,306 INFO L124 PetriNetUnfolderBase]: 8077/11706 cut-off events. [2024-06-03 19:22:27,306 INFO L125 PetriNetUnfolderBase]: For 153993/154010 co-relation queries the response was YES. [2024-06-03 19:22:27,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58775 conditions, 11706 events. 8077/11706 cut-off events. For 153993/154010 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 67880 event pairs, 3542 based on Foata normal form. 19/11701 useless extension candidates. Maximal degree in co-relation 58736. Up to 10934 conditions per place. [2024-06-03 19:22:27,383 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 108 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-03 19:22:27,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1380 flow [2024-06-03 19:22:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:22:27,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062893081761006 [2024-06-03 19:22:27,385 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 988 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:22:27,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1380 flow [2024-06-03 19:22:27,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1270 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:27,445 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1003 flow [2024-06-03 19:22:27,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-03 19:22:27,446 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-03 19:22:27,446 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1003 flow [2024-06-03 19:22:27,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:27,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:27,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:22:27,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:27,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash -987121354, now seen corresponding path program 4 times [2024-06-03 19:22:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:27,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113954333] [2024-06-03 19:22:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:28,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113954333] [2024-06-03 19:22:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113954333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:28,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:28,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211780983] [2024-06-03 19:22:28,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:28,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:28,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:28,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:28,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:28,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:30,191 INFO L124 PetriNetUnfolderBase]: 8611/12302 cut-off events. [2024-06-03 19:22:30,191 INFO L125 PetriNetUnfolderBase]: For 176829/176834 co-relation queries the response was YES. [2024-06-03 19:22:30,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63927 conditions, 12302 events. 8611/12302 cut-off events. For 176829/176834 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 69328 event pairs, 3461 based on Foata normal form. 30/12320 useless extension candidates. Maximal degree in co-relation 63887. Up to 11279 conditions per place. [2024-06-03 19:22:30,289 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 111 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-03 19:22:30,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1559 flow [2024-06-03 19:22:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-03 19:22:30,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-03 19:22:30,292 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1003 flow. Second operand 8 states and 217 transitions. [2024-06-03 19:22:30,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1559 flow [2024-06-03 19:22:30,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 176 transitions, 1476 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:30,399 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1100 flow [2024-06-03 19:22:30,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-03 19:22:30,400 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-03 19:22:30,400 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1100 flow [2024-06-03 19:22:30,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:30,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:30,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:22:30,401 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:30,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -980680546, now seen corresponding path program 2 times [2024-06-03 19:22:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:30,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183226614] [2024-06-03 19:22:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:31,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183226614] [2024-06-03 19:22:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183226614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:31,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:31,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453386306] [2024-06-03 19:22:31,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:31,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:31,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:31,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1100 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:31,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:31,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:31,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:33,325 INFO L124 PetriNetUnfolderBase]: 8669/12429 cut-off events. [2024-06-03 19:22:33,325 INFO L125 PetriNetUnfolderBase]: For 196337/196355 co-relation queries the response was YES. [2024-06-03 19:22:33,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66324 conditions, 12429 events. 8669/12429 cut-off events. For 196337/196355 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70492 event pairs, 3591 based on Foata normal form. 20/12442 useless extension candidates. Maximal degree in co-relation 66283. Up to 11712 conditions per place. [2024-06-03 19:22:33,433 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 132 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2024-06-03 19:22:33,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 1716 flow [2024-06-03 19:22:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-03 19:22:33,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-03 19:22:33,435 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1100 flow. Second operand 8 states and 210 transitions. [2024-06-03 19:22:33,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 1716 flow [2024-06-03 19:22:33,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1566 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:33,568 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1194 flow [2024-06-03 19:22:33,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-03 19:22:33,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-03 19:22:33,568 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1194 flow [2024-06-03 19:22:33,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:33,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:33,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:33,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:22:33,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:33,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash -750464626, now seen corresponding path program 3 times [2024-06-03 19:22:33,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:33,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540003193] [2024-06-03 19:22:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:33,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:34,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540003193] [2024-06-03 19:22:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540003193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:34,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352132890] [2024-06-03 19:22:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:34,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:34,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:34,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1194 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:34,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:34,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:34,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:36,456 INFO L124 PetriNetUnfolderBase]: 8705/12449 cut-off events. [2024-06-03 19:22:36,456 INFO L125 PetriNetUnfolderBase]: For 217396/217414 co-relation queries the response was YES. [2024-06-03 19:22:36,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68861 conditions, 12449 events. 8705/12449 cut-off events. For 217396/217414 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70424 event pairs, 3328 based on Foata normal form. 20/12462 useless extension candidates. Maximal degree in co-relation 68818. Up to 11627 conditions per place. [2024-06-03 19:22:36,559 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 54 changer transitions 0/193 dead transitions. [2024-06-03 19:22:36,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 193 transitions, 1952 flow [2024-06-03 19:22:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:22:36,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-03 19:22:36,573 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1194 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:22:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 193 transitions, 1952 flow [2024-06-03 19:22:36,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 193 transitions, 1844 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:36,697 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1346 flow [2024-06-03 19:22:36,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-03 19:22:36,697 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-03 19:22:36,697 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1346 flow [2024-06-03 19:22:36,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:36,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:36,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:36,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:22:36,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:36,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:36,698 INFO L85 PathProgramCache]: Analyzing trace with hash -986936656, now seen corresponding path program 4 times [2024-06-03 19:22:36,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:36,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743590771] [2024-06-03 19:22:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:37,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:37,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743590771] [2024-06-03 19:22:37,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743590771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:37,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:37,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005482500] [2024-06-03 19:22:37,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:37,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:39,806 INFO L124 PetriNetUnfolderBase]: 8690/12444 cut-off events. [2024-06-03 19:22:39,807 INFO L125 PetriNetUnfolderBase]: For 237504/237522 co-relation queries the response was YES. [2024-06-03 19:22:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69501 conditions, 12444 events. 8690/12444 cut-off events. For 237504/237522 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70419 event pairs, 3588 based on Foata normal form. 20/12457 useless extension candidates. Maximal degree in co-relation 69457. Up to 11743 conditions per place. [2024-06-03 19:22:39,896 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 139 selfloop transitions, 42 changer transitions 0/189 dead transitions. [2024-06-03 19:22:39,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 189 transitions, 1848 flow [2024-06-03 19:22:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 19:22:39,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-03 19:22:39,899 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1346 flow. Second operand 8 states and 211 transitions. [2024-06-03 19:22:39,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 189 transitions, 1848 flow [2024-06-03 19:22:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 1694 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:40,051 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1286 flow [2024-06-03 19:22:40,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1286, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-03 19:22:40,052 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-03 19:22:40,052 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1286 flow [2024-06-03 19:22:40,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:40,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:40,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:40,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:22:40,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:40,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash 788906222, now seen corresponding path program 2 times [2024-06-03 19:22:40,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:40,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024954811] [2024-06-03 19:22:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:40,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024954811] [2024-06-03 19:22:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024954811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:40,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:40,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:40,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430366091] [2024-06-03 19:22:40,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:40,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:40,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:40,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1286 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:40,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:40,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:40,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:42,389 INFO L124 PetriNetUnfolderBase]: 8217/11943 cut-off events. [2024-06-03 19:22:42,389 INFO L125 PetriNetUnfolderBase]: For 247460/247475 co-relation queries the response was YES. [2024-06-03 19:22:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67251 conditions, 11943 events. 8217/11943 cut-off events. For 247460/247475 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 69541 event pairs, 3550 based on Foata normal form. 16/11917 useless extension candidates. Maximal degree in co-relation 67205. Up to 11103 conditions per place. [2024-06-03 19:22:42,503 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 114 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-03 19:22:42,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 1702 flow [2024-06-03 19:22:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:22:42,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-03 19:22:42,505 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1286 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:22:42,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 1702 flow [2024-06-03 19:22:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 169 transitions, 1562 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 19:22:42,667 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1295 flow [2024-06-03 19:22:42,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1295, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-03 19:22:42,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-03 19:22:42,668 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1295 flow [2024-06-03 19:22:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:22:42,669 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -435849466, now seen corresponding path program 1 times [2024-06-03 19:22:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381942690] [2024-06-03 19:22:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:43,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:43,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381942690] [2024-06-03 19:22:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381942690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:43,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920061081] [2024-06-03 19:22:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:43,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:43,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1295 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:43,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:43,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:43,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:44,891 INFO L124 PetriNetUnfolderBase]: 7558/11107 cut-off events. [2024-06-03 19:22:44,891 INFO L125 PetriNetUnfolderBase]: For 231275/231277 co-relation queries the response was YES. [2024-06-03 19:22:44,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64186 conditions, 11107 events. 7558/11107 cut-off events. For 231275/231277 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 64964 event pairs, 2975 based on Foata normal form. 4/11049 useless extension candidates. Maximal degree in co-relation 64141. Up to 10381 conditions per place. [2024-06-03 19:22:44,991 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 154 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-06-03 19:22:44,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 1765 flow [2024-06-03 19:22:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 19:22:44,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:22:44,993 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1295 flow. Second operand 6 states and 159 transitions. [2024-06-03 19:22:44,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 1765 flow [2024-06-03 19:22:45,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 177 transitions, 1654 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:45,136 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1293 flow [2024-06-03 19:22:45,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1293, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2024-06-03 19:22:45,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-03 19:22:45,137 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1293 flow [2024-06-03 19:22:45,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:45,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:45,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:22:45,138 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:45,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 788912174, now seen corresponding path program 2 times [2024-06-03 19:22:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412556132] [2024-06-03 19:22:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412556132] [2024-06-03 19:22:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412556132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:45,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550762705] [2024-06-03 19:22:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:45,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:45,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:45,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1293 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:45,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:45,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:45,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:47,318 INFO L124 PetriNetUnfolderBase]: 7567/11180 cut-off events. [2024-06-03 19:22:47,319 INFO L125 PetriNetUnfolderBase]: For 249084/249091 co-relation queries the response was YES. [2024-06-03 19:22:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66485 conditions, 11180 events. 7567/11180 cut-off events. For 249084/249091 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 65844 event pairs, 2973 based on Foata normal form. 8/11131 useless extension candidates. Maximal degree in co-relation 66439. Up to 10366 conditions per place. [2024-06-03 19:22:47,423 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 149 selfloop transitions, 21 changer transitions 0/179 dead transitions. [2024-06-03 19:22:47,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 179 transitions, 1769 flow [2024-06-03 19:22:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 19:22:47,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:22:47,425 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1293 flow. Second operand 6 states and 159 transitions. [2024-06-03 19:22:47,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 179 transitions, 1769 flow [2024-06-03 19:22:47,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 179 transitions, 1690 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:47,572 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1345 flow [2024-06-03 19:22:47,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1345, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-03 19:22:47,573 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-03 19:22:47,573 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1345 flow [2024-06-03 19:22:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:47,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:22:47,574 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:47,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash -430127610, now seen corresponding path program 1 times [2024-06-03 19:22:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:47,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76900003] [2024-06-03 19:22:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76900003] [2024-06-03 19:22:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76900003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322706656] [2024-06-03 19:22:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:48,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:48,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:48,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:48,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:50,424 INFO L124 PetriNetUnfolderBase]: 8553/12550 cut-off events. [2024-06-03 19:22:50,424 INFO L125 PetriNetUnfolderBase]: For 320470/320487 co-relation queries the response was YES. [2024-06-03 19:22:50,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77138 conditions, 12550 events. 8553/12550 cut-off events. For 320470/320487 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 74679 event pairs, 3617 based on Foata normal form. 17/12485 useless extension candidates. Maximal degree in co-relation 77091. Up to 11611 conditions per place. [2024-06-03 19:22:50,532 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 151 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2024-06-03 19:22:50,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 189 transitions, 1844 flow [2024-06-03 19:22:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:22:50,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-03 19:22:50,550 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1345 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:22:50,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 189 transitions, 1844 flow [2024-06-03 19:22:50,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 189 transitions, 1738 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:50,742 INFO L231 Difference]: Finished difference. Result has 123 places, 167 transitions, 1392 flow [2024-06-03 19:22:50,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=123, PETRI_TRANSITIONS=167} [2024-06-03 19:22:50,742 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-03 19:22:50,743 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 167 transitions, 1392 flow [2024-06-03 19:22:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:50,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:22:50,743 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:50,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1608926904, now seen corresponding path program 1 times [2024-06-03 19:22:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:50,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830301195] [2024-06-03 19:22:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830301195] [2024-06-03 19:22:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830301195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:51,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:51,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052503270] [2024-06-03 19:22:51,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:52,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 167 transitions, 1392 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:52,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:54,179 INFO L124 PetriNetUnfolderBase]: 10013/14326 cut-off events. [2024-06-03 19:22:54,180 INFO L125 PetriNetUnfolderBase]: For 392799/392804 co-relation queries the response was YES. [2024-06-03 19:22:54,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91874 conditions, 14326 events. 10013/14326 cut-off events. For 392799/392804 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 82306 event pairs, 3905 based on Foata normal form. 18/14320 useless extension candidates. Maximal degree in co-relation 91825. Up to 12916 conditions per place. [2024-06-03 19:22:54,298 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 150 selfloop transitions, 79 changer transitions 0/238 dead transitions. [2024-06-03 19:22:54,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 238 transitions, 2249 flow [2024-06-03 19:22:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-03 19:22:54,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-03 19:22:54,300 INFO L175 Difference]: Start difference. First operand has 123 places, 167 transitions, 1392 flow. Second operand 9 states and 246 transitions. [2024-06-03 19:22:54,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 238 transitions, 2249 flow [2024-06-03 19:22:54,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 238 transitions, 2158 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:54,491 INFO L231 Difference]: Finished difference. Result has 130 places, 183 transitions, 1715 flow [2024-06-03 19:22:54,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1715, PETRI_PLACES=130, PETRI_TRANSITIONS=183} [2024-06-03 19:22:54,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-03 19:22:54,492 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 183 transitions, 1715 flow [2024-06-03 19:22:54,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:54,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:54,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:54,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:22:54,492 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:54,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 498987198, now seen corresponding path program 2 times [2024-06-03 19:22:54,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:54,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922027841] [2024-06-03 19:22:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:54,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:55,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:55,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922027841] [2024-06-03 19:22:55,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922027841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:55,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:55,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:55,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460247873] [2024-06-03 19:22:55,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:55,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:55,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:55,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:55,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:55,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 183 transitions, 1715 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:55,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:55,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:55,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:58,210 INFO L124 PetriNetUnfolderBase]: 10255/14744 cut-off events. [2024-06-03 19:22:58,211 INFO L125 PetriNetUnfolderBase]: For 431522/431527 co-relation queries the response was YES. [2024-06-03 19:22:58,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97268 conditions, 14744 events. 10255/14744 cut-off events. For 431522/431527 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 85747 event pairs, 3967 based on Foata normal form. 18/14745 useless extension candidates. Maximal degree in co-relation 97216. Up to 13439 conditions per place. [2024-06-03 19:22:58,333 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 154 selfloop transitions, 81 changer transitions 0/244 dead transitions. [2024-06-03 19:22:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 244 transitions, 2517 flow [2024-06-03 19:22:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-03 19:22:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-03 19:22:58,336 INFO L175 Difference]: Start difference. First operand has 130 places, 183 transitions, 1715 flow. Second operand 9 states and 244 transitions. [2024-06-03 19:22:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 244 transitions, 2517 flow [2024-06-03 19:22:58,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 244 transitions, 2351 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:58,543 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1895 flow [2024-06-03 19:22:58,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-03 19:22:58,543 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-03 19:22:58,543 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1895 flow [2024-06-03 19:22:58,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:58,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:58,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:58,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:22:58,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:58,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2093215952, now seen corresponding path program 3 times [2024-06-03 19:22:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:58,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250412842] [2024-06-03 19:22:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:58,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:59,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250412842] [2024-06-03 19:22:59,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250412842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:59,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016535246] [2024-06-03 19:22:59,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:59,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:59,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:59,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1895 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:59,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:59,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:02,185 INFO L124 PetriNetUnfolderBase]: 10439/15040 cut-off events. [2024-06-03 19:23:02,185 INFO L125 PetriNetUnfolderBase]: For 469465/469470 co-relation queries the response was YES. [2024-06-03 19:23:02,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101284 conditions, 15040 events. 10439/15040 cut-off events. For 469465/469470 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 87791 event pairs, 4007 based on Foata normal form. 18/15041 useless extension candidates. Maximal degree in co-relation 101229. Up to 13719 conditions per place. [2024-06-03 19:23:02,319 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 156 selfloop transitions, 86 changer transitions 0/251 dead transitions. [2024-06-03 19:23:02,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 251 transitions, 2707 flow [2024-06-03 19:23:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-03 19:23:02,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:23:02,321 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1895 flow. Second operand 9 states and 243 transitions. [2024-06-03 19:23:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 251 transitions, 2707 flow [2024-06-03 19:23:02,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 251 transitions, 2517 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:02,608 INFO L231 Difference]: Finished difference. Result has 143 places, 199 transitions, 2042 flow [2024-06-03 19:23:02,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2042, PETRI_PLACES=143, PETRI_TRANSITIONS=199} [2024-06-03 19:23:02,608 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-03 19:23:02,609 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 199 transitions, 2042 flow [2024-06-03 19:23:02,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:02,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:02,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:02,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:23:02,609 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:02,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1789565442, now seen corresponding path program 4 times [2024-06-03 19:23:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912504303] [2024-06-03 19:23:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:03,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:03,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912504303] [2024-06-03 19:23:03,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912504303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:03,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:03,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831595377] [2024-06-03 19:23:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:04,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:04,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 199 transitions, 2042 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:04,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:04,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:04,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:06,514 INFO L124 PetriNetUnfolderBase]: 10400/14965 cut-off events. [2024-06-03 19:23:06,515 INFO L125 PetriNetUnfolderBase]: For 497382/497387 co-relation queries the response was YES. [2024-06-03 19:23:06,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101702 conditions, 14965 events. 10400/14965 cut-off events. For 497382/497387 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 87052 event pairs, 3669 based on Foata normal form. 18/14966 useless extension candidates. Maximal degree in co-relation 101645. Up to 12720 conditions per place. [2024-06-03 19:23:06,657 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 138 selfloop transitions, 106 changer transitions 0/253 dead transitions. [2024-06-03 19:23:06,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 253 transitions, 2760 flow [2024-06-03 19:23:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-03 19:23:06,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-03 19:23:06,659 INFO L175 Difference]: Start difference. First operand has 143 places, 199 transitions, 2042 flow. Second operand 9 states and 242 transitions. [2024-06-03 19:23:06,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 253 transitions, 2760 flow [2024-06-03 19:23:06,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 253 transitions, 2572 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:06,961 INFO L231 Difference]: Finished difference. Result has 147 places, 200 transitions, 2117 flow [2024-06-03 19:23:06,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2117, PETRI_PLACES=147, PETRI_TRANSITIONS=200} [2024-06-03 19:23:06,962 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-03 19:23:06,962 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 200 transitions, 2117 flow [2024-06-03 19:23:06,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:06,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:06,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:06,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:23:06,963 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:06,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -626550338, now seen corresponding path program 1 times [2024-06-03 19:23:06,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:06,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782003359] [2024-06-03 19:23:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:08,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:08,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782003359] [2024-06-03 19:23:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782003359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:08,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:08,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106806617] [2024-06-03 19:23:08,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:08,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:23:08,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 200 transitions, 2117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:08,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:08,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:23:08,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:10,462 INFO L124 PetriNetUnfolderBase]: 9001/13328 cut-off events. [2024-06-03 19:23:10,462 INFO L125 PetriNetUnfolderBase]: For 431196/431198 co-relation queries the response was YES. [2024-06-03 19:23:10,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90289 conditions, 13328 events. 9001/13328 cut-off events. For 431196/431198 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 80804 event pairs, 3280 based on Foata normal form. 2/13252 useless extension candidates. Maximal degree in co-relation 90231. Up to 12415 conditions per place. [2024-06-03 19:23:10,621 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 204 selfloop transitions, 18 changer transitions 0/232 dead transitions. [2024-06-03 19:23:10,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 232 transitions, 2741 flow [2024-06-03 19:23:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 19:23:10,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-03 19:23:10,624 INFO L175 Difference]: Start difference. First operand has 147 places, 200 transitions, 2117 flow. Second operand 7 states and 183 transitions. [2024-06-03 19:23:10,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 232 transitions, 2741 flow [2024-06-03 19:23:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 232 transitions, 2468 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 19:23:11,045 INFO L231 Difference]: Finished difference. Result has 147 places, 204 transitions, 1989 flow [2024-06-03 19:23:11,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1844, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=147, PETRI_TRANSITIONS=204} [2024-06-03 19:23:11,046 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-03 19:23:11,046 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 204 transitions, 1989 flow [2024-06-03 19:23:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:11,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:11,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:23:11,047 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:11,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1313278928, now seen corresponding path program 1 times [2024-06-03 19:23:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:11,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678695392] [2024-06-03 19:23:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:12,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:12,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678695392] [2024-06-03 19:23:12,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678695392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:12,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571729231] [2024-06-03 19:23:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:12,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:12,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:23:12,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 204 transitions, 1989 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:12,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:12,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:23:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:14,712 INFO L124 PetriNetUnfolderBase]: 9104/13437 cut-off events. [2024-06-03 19:23:14,713 INFO L125 PetriNetUnfolderBase]: For 506867/506884 co-relation queries the response was YES. [2024-06-03 19:23:14,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93299 conditions, 13437 events. 9104/13437 cut-off events. For 506867/506884 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 81229 event pairs, 3556 based on Foata normal form. 19/13341 useless extension candidates. Maximal degree in co-relation 93240. Up to 12480 conditions per place. [2024-06-03 19:23:14,853 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 193 selfloop transitions, 21 changer transitions 0/234 dead transitions. [2024-06-03 19:23:14,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 234 transitions, 2585 flow [2024-06-03 19:23:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 19:23:14,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-03 19:23:14,854 INFO L175 Difference]: Start difference. First operand has 147 places, 204 transitions, 1989 flow. Second operand 8 states and 200 transitions. [2024-06-03 19:23:14,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 234 transitions, 2585 flow [2024-06-03 19:23:15,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 234 transitions, 2470 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:15,197 INFO L231 Difference]: Finished difference. Result has 150 places, 207 transitions, 2016 flow [2024-06-03 19:23:15,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2016, PETRI_PLACES=150, PETRI_TRANSITIONS=207} [2024-06-03 19:23:15,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-03 19:23:15,198 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 207 transitions, 2016 flow [2024-06-03 19:23:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:15,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:15,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:15,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:23:15,198 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:15,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1266067811, now seen corresponding path program 1 times [2024-06-03 19:23:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123555297] [2024-06-03 19:23:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:15,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123555297] [2024-06-03 19:23:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123555297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:23:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450499309] [2024-06-03 19:23:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:23:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:23:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:23:15,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:15,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 207 transitions, 2016 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:15,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:15,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:15,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:18,083 INFO L124 PetriNetUnfolderBase]: 10444/15129 cut-off events. [2024-06-03 19:23:18,083 INFO L125 PetriNetUnfolderBase]: For 616040/616057 co-relation queries the response was YES. [2024-06-03 19:23:18,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108025 conditions, 15129 events. 10444/15129 cut-off events. For 616040/616057 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 89317 event pairs, 4292 based on Foata normal form. 16/15087 useless extension candidates. Maximal degree in co-relation 107965. Up to 14272 conditions per place. [2024-06-03 19:23:18,263 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 193 selfloop transitions, 10 changer transitions 0/222 dead transitions. [2024-06-03 19:23:18,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 222 transitions, 2534 flow [2024-06-03 19:23:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:23:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:23:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 19:23:18,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-03 19:23:18,264 INFO L175 Difference]: Start difference. First operand has 150 places, 207 transitions, 2016 flow. Second operand 5 states and 123 transitions. [2024-06-03 19:23:18,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 222 transitions, 2534 flow [2024-06-03 19:23:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 222 transitions, 2416 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:18,597 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2011 flow [2024-06-03 19:23:18,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2011, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-06-03 19:23:18,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-03 19:23:18,598 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2011 flow [2024-06-03 19:23:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:18,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:18,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:23:18,599 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:18,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 847950693, now seen corresponding path program 1 times [2024-06-03 19:23:18,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:18,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296058909] [2024-06-03 19:23:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296058909] [2024-06-03 19:23:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296058909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:19,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710843597] [2024-06-03 19:23:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:19,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2011 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:22,584 INFO L124 PetriNetUnfolderBase]: 11373/16270 cut-off events. [2024-06-03 19:23:22,584 INFO L125 PetriNetUnfolderBase]: For 737408/737427 co-relation queries the response was YES. [2024-06-03 19:23:22,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123355 conditions, 16270 events. 11373/16270 cut-off events. For 737408/737427 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 95204 event pairs, 4351 based on Foata normal form. 16/16200 useless extension candidates. Maximal degree in co-relation 123294. Up to 15350 conditions per place. [2024-06-03 19:23:22,736 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 210 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-03 19:23:22,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 249 transitions, 2703 flow [2024-06-03 19:23:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 19:23:22,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-03 19:23:22,738 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2011 flow. Second operand 7 states and 183 transitions. [2024-06-03 19:23:22,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 249 transitions, 2703 flow [2024-06-03 19:23:22,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 249 transitions, 2618 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:23,002 INFO L231 Difference]: Finished difference. Result has 153 places, 215 transitions, 2095 flow [2024-06-03 19:23:23,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2095, PETRI_PLACES=153, PETRI_TRANSITIONS=215} [2024-06-03 19:23:23,003 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-03 19:23:23,003 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 215 transitions, 2095 flow [2024-06-03 19:23:23,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:23,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:23,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:23,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:23:23,004 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:23,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash 853664613, now seen corresponding path program 2 times [2024-06-03 19:23:23,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:23,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169349769] [2024-06-03 19:23:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:23,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:24,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169349769] [2024-06-03 19:23:24,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169349769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:24,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:24,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:24,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763955431] [2024-06-03 19:23:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:24,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:24,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:24,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 215 transitions, 2095 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:24,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:24,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:24,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:26,779 INFO L124 PetriNetUnfolderBase]: 11451/16387 cut-off events. [2024-06-03 19:23:26,780 INFO L125 PetriNetUnfolderBase]: For 789916/789938 co-relation queries the response was YES. [2024-06-03 19:23:26,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128233 conditions, 16387 events. 11451/16387 cut-off events. For 789916/789938 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 96096 event pairs, 4353 based on Foata normal form. 16/16317 useless extension candidates. Maximal degree in co-relation 128171. Up to 15396 conditions per place. [2024-06-03 19:23:26,957 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 212 selfloop transitions, 38 changer transitions 0/260 dead transitions. [2024-06-03 19:23:26,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 260 transitions, 3063 flow [2024-06-03 19:23:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 19:23:26,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-03 19:23:26,959 INFO L175 Difference]: Start difference. First operand has 153 places, 215 transitions, 2095 flow. Second operand 7 states and 184 transitions. [2024-06-03 19:23:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 260 transitions, 3063 flow [2024-06-03 19:23:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 260 transitions, 2938 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:27,291 INFO L231 Difference]: Finished difference. Result has 157 places, 226 transitions, 2304 flow [2024-06-03 19:23:27,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2304, PETRI_PLACES=157, PETRI_TRANSITIONS=226} [2024-06-03 19:23:27,292 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-03 19:23:27,292 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 226 transitions, 2304 flow [2024-06-03 19:23:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:27,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:27,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:27,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:23:27,292 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:27,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1573995943, now seen corresponding path program 1 times [2024-06-03 19:23:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:27,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123615049] [2024-06-03 19:23:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123615049] [2024-06-03 19:23:28,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123615049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:28,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:28,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:28,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611867213] [2024-06-03 19:23:28,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:28,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:28,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 226 transitions, 2304 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:28,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:28,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:28,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:31,612 INFO L124 PetriNetUnfolderBase]: 11404/16319 cut-off events. [2024-06-03 19:23:31,612 INFO L125 PetriNetUnfolderBase]: For 873131/873186 co-relation queries the response was YES. [2024-06-03 19:23:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130822 conditions, 16319 events. 11404/16319 cut-off events. For 873131/873186 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 95703 event pairs, 4559 based on Foata normal form. 19/16211 useless extension candidates. Maximal degree in co-relation 130758. Up to 15223 conditions per place. [2024-06-03 19:23:31,815 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 203 selfloop transitions, 41 changer transitions 0/267 dead transitions. [2024-06-03 19:23:31,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 267 transitions, 3025 flow [2024-06-03 19:23:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 19:23:31,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-03 19:23:31,817 INFO L175 Difference]: Start difference. First operand has 157 places, 226 transitions, 2304 flow. Second operand 8 states and 199 transitions. [2024-06-03 19:23:31,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 267 transitions, 3025 flow [2024-06-03 19:23:32,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 267 transitions, 2885 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:32,317 INFO L231 Difference]: Finished difference. Result has 163 places, 236 transitions, 2414 flow [2024-06-03 19:23:32,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2414, PETRI_PLACES=163, PETRI_TRANSITIONS=236} [2024-06-03 19:23:32,318 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-03 19:23:32,318 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 236 transitions, 2414 flow [2024-06-03 19:23:32,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:32,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:32,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:23:32,319 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:32,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash -713889077, now seen corresponding path program 3 times [2024-06-03 19:23:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:32,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962891231] [2024-06-03 19:23:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962891231] [2024-06-03 19:23:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962891231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:33,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:33,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142648987] [2024-06-03 19:23:33,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:33,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:33,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 236 transitions, 2414 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:33,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:33,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:36,651 INFO L124 PetriNetUnfolderBase]: 11497/16453 cut-off events. [2024-06-03 19:23:36,652 INFO L125 PetriNetUnfolderBase]: For 883926/883944 co-relation queries the response was YES. [2024-06-03 19:23:36,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135338 conditions, 16453 events. 11497/16453 cut-off events. For 883926/883944 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 96550 event pairs, 4305 based on Foata normal form. 18/16379 useless extension candidates. Maximal degree in co-relation 135271. Up to 15509 conditions per place. [2024-06-03 19:23:36,832 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 229 selfloop transitions, 29 changer transitions 0/269 dead transitions. [2024-06-03 19:23:36,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3055 flow [2024-06-03 19:23:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 19:23:36,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-03 19:23:36,833 INFO L175 Difference]: Start difference. First operand has 163 places, 236 transitions, 2414 flow. Second operand 7 states and 180 transitions. [2024-06-03 19:23:36,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3055 flow [2024-06-03 19:23:37,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 269 transitions, 2827 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:37,296 INFO L231 Difference]: Finished difference. Result has 165 places, 237 transitions, 2266 flow [2024-06-03 19:23:37,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2266, PETRI_PLACES=165, PETRI_TRANSITIONS=237} [2024-06-03 19:23:37,297 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-03 19:23:37,297 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 237 transitions, 2266 flow [2024-06-03 19:23:37,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:37,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:37,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:23:37,297 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:37,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2055488357, now seen corresponding path program 4 times [2024-06-03 19:23:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548702014] [2024-06-03 19:23:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548702014] [2024-06-03 19:23:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548702014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:38,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67701863] [2024-06-03 19:23:38,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:38,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:38,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 237 transitions, 2266 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:38,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:38,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:41,367 INFO L124 PetriNetUnfolderBase]: 11517/16481 cut-off events. [2024-06-03 19:23:41,368 INFO L125 PetriNetUnfolderBase]: For 921567/921585 co-relation queries the response was YES. [2024-06-03 19:23:41,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136488 conditions, 16481 events. 11517/16481 cut-off events. For 921567/921585 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 96648 event pairs, 4328 based on Foata normal form. 18/16409 useless extension candidates. Maximal degree in co-relation 136420. Up to 15479 conditions per place. [2024-06-03 19:23:41,552 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 220 selfloop transitions, 40 changer transitions 0/271 dead transitions. [2024-06-03 19:23:41,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 271 transitions, 3010 flow [2024-06-03 19:23:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 19:23:41,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-03 19:23:41,554 INFO L175 Difference]: Start difference. First operand has 165 places, 237 transitions, 2266 flow. Second operand 7 states and 179 transitions. [2024-06-03 19:23:41,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 271 transitions, 3010 flow [2024-06-03 19:23:41,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 271 transitions, 2908 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:23:41,975 INFO L231 Difference]: Finished difference. Result has 165 places, 241 transitions, 2373 flow [2024-06-03 19:23:41,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2373, PETRI_PLACES=165, PETRI_TRANSITIONS=241} [2024-06-03 19:23:41,975 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-03 19:23:41,975 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 241 transitions, 2373 flow [2024-06-03 19:23:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:41,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:41,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:41,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:23:41,976 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:41,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1043369115, now seen corresponding path program 5 times [2024-06-03 19:23:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937179893] [2024-06-03 19:23:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:41,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937179893] [2024-06-03 19:23:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937179893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041496351] [2024-06-03 19:23:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:43,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:43,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 241 transitions, 2373 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:43,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:43,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:43,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand