./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix008.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/mix008.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/mix008.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix008.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 [2024-06-04 14:37:58,376 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:37:58,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:37:58,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:37:58,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:37:58,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:37:58,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:37:58,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:37:58,472 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:37:58,475 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:37:58,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:37:58,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:37:58,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:37:58,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:37:58,477 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:37:58,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:37:58,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:37:58,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:37:58,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:37:58,478 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:37:58,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:37:58,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:37:58,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:37:58,479 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:37:58,480 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:37:58,480 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:37:58,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:37:58,480 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:37:58,481 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:37:58,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:37:58,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:37:58,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:37:58,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:37:58,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:37:58,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:37:58,483 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:37:58,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:37:58,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:37:58,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:37:58,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:37:58,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:37:58,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:37:58,688 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:37:58,688 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:37:58,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-04 14:37:59,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:38:00,083 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:38:00,086 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-04 14:38:00,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e7d0e4a/889c6c6771cc4cbe88774f56926b46f6/FLAGac3e99247 [2024-06-04 14:38:00,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e7d0e4a/889c6c6771cc4cbe88774f56926b46f6 [2024-06-04 14:38:00,119 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:38:00,120 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:38:00,122 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix008.opt.yml/witness.yml [2024-06-04 14:38:00,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:38:00,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:38:00,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:38:00,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:38:00,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:38:00,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:38:00" (1/2) ... [2024-06-04 14:38:00,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9911dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:00, skipping insertion in model container [2024-06-04 14:38:00,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:38:00" (1/2) ... [2024-06-04 14:38:00,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@480ce984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:00, skipping insertion in model container [2024-06-04 14:38:00,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:00" (2/2) ... [2024-06-04 14:38:00,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9911dc8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00, skipping insertion in model container [2024-06-04 14:38:00,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:00" (2/2) ... [2024-06-04 14:38:00,343 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:38:00,437 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:38:00,439 INFO L97 edCorrectnessWitness]: Location invariant before [L875-L875] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:38:00,439 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:38:00,439 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:38:00,439 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:38:00,440 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:38:00,440 INFO L106 edCorrectnessWitness]: ghost_update [L868-L868] multithreaded = 1; [2024-06-04 14:38:00,480 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:38:00,797 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:38:00,804 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:38:00,954 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:38:00,982 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:38:00,982 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00 WrapperNode [2024-06-04 14:38:00,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:38:00,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:38:00,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:38:00,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:38:00,988 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 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,005 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 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,044 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-04 14:38:01,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:38:01,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:38:01,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:38:01,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:38:01,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,060 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,073 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]. [2024-06-04 14:38:01,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,074 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:38:01,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:38:01,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:38:01,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:38:01,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (1/1) ... [2024-06-04 14:38:01,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:38:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:38:01,136 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) [2024-06-04 14:38:01,175 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 [2024-06-04 14:38:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:38:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:38:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:38:01,190 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:38:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:38:01,191 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:38:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:38:01,191 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:38:01,192 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:38:01,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:38:01,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:38:01,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:38:01,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:38:01,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:38:01,194 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:38:01,357 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:38:01,359 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:38:01,742 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:38:01,742 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:38:01,875 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:38:01,875 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:38:01,875 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:38:01 BoogieIcfgContainer [2024-06-04 14:38:01,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:38:01,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:38:01,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:38:01,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:38:01,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:38:00" (1/4) ... [2024-06-04 14:38:01,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdc656f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:38:01, skipping insertion in model container [2024-06-04 14:38:01,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:00" (2/4) ... [2024-06-04 14:38:01,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdc656f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:38:01, skipping insertion in model container [2024-06-04 14:38:01,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:00" (3/4) ... [2024-06-04 14:38:01,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdc656f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:38:01, skipping insertion in model container [2024-06-04 14:38:01,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:38:01" (4/4) ... [2024-06-04 14:38:01,882 INFO L112 eAbstractionObserver]: Analyzing ICFG mix008.opt.i [2024-06-04 14:38:01,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:38:01,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:38:01,896 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:38:01,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:38:01,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:38:02,001 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 14:38:02,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:38:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:38:02,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:38:02,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 14:38:02,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:38:02,025 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;@42f7980a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:38:02,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:38:02,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:38:02,030 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:38:02,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:38:02,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:02,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:38:02,031 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)] === [2024-06-04 14:38:02,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 335012853, now seen corresponding path program 1 times [2024-06-04 14:38:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634123767] [2024-06-04 14:38:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634123767] [2024-06-04 14:38:03,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634123767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:03,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:03,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:38:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999280168] [2024-06-04 14:38:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:38:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:03,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:38:03,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:38:03,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-04 14:38:03,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:03,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:03,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-04 14:38:03,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:04,526 INFO L124 PetriNetUnfolderBase]: 7892/11216 cut-off events. [2024-06-04 14:38:04,526 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-04 14:38:04,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22295 conditions, 11216 events. 7892/11216 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63270 event pairs, 6010 based on Foata normal form. 1/10838 useless extension candidates. Maximal degree in co-relation 22279. Up to 10748 conditions per place. [2024-06-04 14:38:04,582 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 14:38:04,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-04 14:38:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:38:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:38:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-04 14:38:04,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-04 14:38:04,592 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 101 transitions. [2024-06-04 14:38:04,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-04 14:38:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:04,596 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 14:38:04,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 14:38:04,600 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 14:38:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 14:38:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:04,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:04,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:38:04,601 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)] === [2024-06-04 14:38:04,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash -175142252, now seen corresponding path program 1 times [2024-06-04 14:38:04,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088339110] [2024-06-04 14:38:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088339110] [2024-06-04 14:38:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088339110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:05,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:05,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:38:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129388722] [2024-06-04 14:38:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:38:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:38:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:38:05,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:38:05,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:05,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:05,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:38:05,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:06,605 INFO L124 PetriNetUnfolderBase]: 9032/12527 cut-off events. [2024-06-04 14:38:06,605 INFO L125 PetriNetUnfolderBase]: For 2518/2518 co-relation queries the response was YES. [2024-06-04 14:38:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28442 conditions, 12527 events. 9032/12527 cut-off events. For 2518/2518 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68438 event pairs, 6162 based on Foata normal form. 4/12455 useless extension candidates. Maximal degree in co-relation 28427. Up to 12238 conditions per place. [2024-06-04 14:38:06,678 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 14:38:06,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 329 flow [2024-06-04 14:38:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:38:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:38:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-04 14:38:06,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 14:38:06,681 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 128 transitions. [2024-06-04 14:38:06,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 329 flow [2024-06-04 14:38:06,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:38:06,687 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 14:38:06,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 14:38:06,687 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 14:38:06,688 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 14:38:06,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:06,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:06,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:06,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:38:06,688 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)] === [2024-06-04 14:38:06,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1134440792, now seen corresponding path program 1 times [2024-06-04 14:38:06,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:06,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705418938] [2024-06-04 14:38:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705418938] [2024-06-04 14:38:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705418938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:07,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:07,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:38:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566396509] [2024-06-04 14:38:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:07,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:38:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:38:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:38:07,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:38:07,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:07,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:07,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:38:07,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:08,883 INFO L124 PetriNetUnfolderBase]: 9050/12628 cut-off events. [2024-06-04 14:38:08,883 INFO L125 PetriNetUnfolderBase]: For 7273/7273 co-relation queries the response was YES. [2024-06-04 14:38:08,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31885 conditions, 12628 events. 9050/12628 cut-off events. For 7273/7273 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69843 event pairs, 4826 based on Foata normal form. 7/12608 useless extension candidates. Maximal degree in co-relation 31868. Up to 12159 conditions per place. [2024-06-04 14:38:08,943 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-04 14:38:08,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 545 flow [2024-06-04 14:38:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-04 14:38:08,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-04 14:38:08,950 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 167 transitions. [2024-06-04 14:38:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 545 flow [2024-06-04 14:38:08,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 14:38:08,955 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-04 14:38:08,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 14:38:08,956 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-04 14:38:08,956 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-04 14:38:08,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:08,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:08,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:08,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:38:08,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:08,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash 724148263, now seen corresponding path program 1 times [2024-06-04 14:38:08,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:08,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689077673] [2024-06-04 14:38:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:08,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:09,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689077673] [2024-06-04 14:38:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689077673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016305603] [2024-06-04 14:38:09,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:09,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:09,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:38:09,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 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) [2024-06-04 14:38:09,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:09,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:38:09,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:11,028 INFO L124 PetriNetUnfolderBase]: 9079/12673 cut-off events. [2024-06-04 14:38:11,028 INFO L125 PetriNetUnfolderBase]: For 17170/17175 co-relation queries the response was YES. [2024-06-04 14:38:11,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37381 conditions, 12673 events. 9079/12673 cut-off events. For 17170/17175 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70227 event pairs, 3910 based on Foata normal form. 18/12664 useless extension candidates. Maximal degree in co-relation 37361. Up to 12124 conditions per place. [2024-06-04 14:38:11,112 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 80 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-04 14:38:11,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 690 flow [2024-06-04 14:38:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-04 14:38:11,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2024-06-04 14:38:11,114 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 193 transitions. [2024-06-04 14:38:11,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 690 flow [2024-06-04 14:38:11,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 14:38:11,123 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-04 14:38:11,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-04 14:38:11,125 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-04 14:38:11,125 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-04 14:38:11,125 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) [2024-06-04 14:38:11,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:11,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:38:11,126 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)] === [2024-06-04 14:38:11,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -391343180, now seen corresponding path program 1 times [2024-06-04 14:38:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:11,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479942742] [2024-06-04 14:38:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:11,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:11,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479942742] [2024-06-04 14:38:11,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479942742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:11,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:11,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434791489] [2024-06-04 14:38:11,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:11,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:11,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:38:11,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 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) [2024-06-04 14:38:11,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:11,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:38:11,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:13,139 INFO L124 PetriNetUnfolderBase]: 7920/11331 cut-off events. [2024-06-04 14:38:13,139 INFO L125 PetriNetUnfolderBase]: For 22247/22247 co-relation queries the response was YES. [2024-06-04 14:38:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 11331 events. 7920/11331 cut-off events. For 22247/22247 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64745 event pairs, 4036 based on Foata normal form. 3/11162 useless extension candidates. Maximal degree in co-relation 36225. Up to 10775 conditions per place. [2024-06-04 14:38:13,201 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 67 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-04 14:38:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 589 flow [2024-06-04 14:38:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 14:38:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-04 14:38:13,202 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 137 transitions. [2024-06-04 14:38:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 589 flow [2024-06-04 14:38:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 520 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:13,210 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-04 14:38:13,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-04 14:38:13,215 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-04 14:38:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-04 14:38:13,216 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) [2024-06-04 14:38:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:13,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:38:13,216 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)] === [2024-06-04 14:38:13,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 719101608, now seen corresponding path program 1 times [2024-06-04 14:38:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699498710] [2024-06-04 14:38:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:14,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:14,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699498710] [2024-06-04 14:38:14,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699498710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:14,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:14,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802125525] [2024-06-04 14:38:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:14,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:14,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:14,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:14,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:14,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:14,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:15,815 INFO L124 PetriNetUnfolderBase]: 9587/13503 cut-off events. [2024-06-04 14:38:15,815 INFO L125 PetriNetUnfolderBase]: For 30010/30010 co-relation queries the response was YES. [2024-06-04 14:38:15,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43617 conditions, 13503 events. 9587/13503 cut-off events. For 30010/30010 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75620 event pairs, 4728 based on Foata normal form. 5/13328 useless extension candidates. Maximal degree in co-relation 43592. Up to 12930 conditions per place. [2024-06-04 14:38:15,916 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-04 14:38:15,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 753 flow [2024-06-04 14:38:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-04 14:38:15,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-04 14:38:15,920 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 166 transitions. [2024-06-04 14:38:15,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 753 flow [2024-06-04 14:38:15,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:15,931 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 498 flow [2024-06-04 14:38:15,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=498, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-04 14:38:15,931 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-04 14:38:15,932 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 498 flow [2024-06-04 14:38:15,932 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) [2024-06-04 14:38:15,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:15,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:15,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:38:15,932 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)] === [2024-06-04 14:38:15,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash 41137883, now seen corresponding path program 1 times [2024-06-04 14:38:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374654548] [2024-06-04 14:38:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:16,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374654548] [2024-06-04 14:38:16,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374654548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:16,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:16,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227260806] [2024-06-04 14:38:16,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:16,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:16,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:16,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 498 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) [2024-06-04 14:38:16,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:16,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:16,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:18,424 INFO L124 PetriNetUnfolderBase]: 10390/14515 cut-off events. [2024-06-04 14:38:18,424 INFO L125 PetriNetUnfolderBase]: For 52830/52846 co-relation queries the response was YES. [2024-06-04 14:38:18,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52903 conditions, 14515 events. 10390/14515 cut-off events. For 52830/52846 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81503 event pairs, 5061 based on Foata normal form. 14/14433 useless extension candidates. Maximal degree in co-relation 52876. Up to 13936 conditions per place. [2024-06-04 14:38:18,527 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-06-04 14:38:18,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 853 flow [2024-06-04 14:38:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-04 14:38:18,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-04 14:38:18,529 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 498 flow. Second operand 6 states and 168 transitions. [2024-06-04 14:38:18,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 853 flow [2024-06-04 14:38:18,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 829 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 14:38:18,550 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 570 flow [2024-06-04 14:38:18,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-04 14:38:18,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-04 14:38:18,551 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 570 flow [2024-06-04 14:38:18,551 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) [2024-06-04 14:38:18,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:18,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:38:18,552 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)] === [2024-06-04 14:38:18,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1876377363, now seen corresponding path program 2 times [2024-06-04 14:38:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412963412] [2024-06-04 14:38:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:19,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412963412] [2024-06-04 14:38:19,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412963412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:19,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759486942] [2024-06-04 14:38:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:19,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:19,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 570 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) [2024-06-04 14:38:19,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:19,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:19,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:20,925 INFO L124 PetriNetUnfolderBase]: 10366/14467 cut-off events. [2024-06-04 14:38:20,926 INFO L125 PetriNetUnfolderBase]: For 58409/58415 co-relation queries the response was YES. [2024-06-04 14:38:20,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53288 conditions, 14467 events. 10366/14467 cut-off events. For 58409/58415 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81129 event pairs, 5081 based on Foata normal form. 3/14371 useless extension candidates. Maximal degree in co-relation 53258. Up to 13906 conditions per place. [2024-06-04 14:38:21,034 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2024-06-04 14:38:21,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 832 flow [2024-06-04 14:38:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 14:38:21,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-04 14:38:21,036 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 570 flow. Second operand 6 states and 163 transitions. [2024-06-04 14:38:21,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 832 flow [2024-06-04 14:38:21,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 789 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:21,063 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 590 flow [2024-06-04 14:38:21,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-04 14:38:21,063 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-04 14:38:21,063 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 590 flow [2024-06-04 14:38:21,064 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) [2024-06-04 14:38:21,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:21,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:38:21,064 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)] === [2024-06-04 14:38:21,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1270489261, now seen corresponding path program 1 times [2024-06-04 14:38:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573640107] [2024-06-04 14:38:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:21,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:21,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573640107] [2024-06-04 14:38:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573640107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:21,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466485912] [2024-06-04 14:38:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:21,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:22,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:22,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:22,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:22,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:22,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:23,862 INFO L124 PetriNetUnfolderBase]: 11509/16006 cut-off events. [2024-06-04 14:38:23,862 INFO L125 PetriNetUnfolderBase]: For 74846/74849 co-relation queries the response was YES. [2024-06-04 14:38:23,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60278 conditions, 16006 events. 11509/16006 cut-off events. For 74846/74849 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 89612 event pairs, 4900 based on Foata normal form. 12/16005 useless extension candidates. Maximal degree in co-relation 60247. Up to 14734 conditions per place. [2024-06-04 14:38:23,963 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 124 selfloop transitions, 59 changer transitions 0/190 dead transitions. [2024-06-04 14:38:23,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 190 transitions, 1670 flow [2024-06-04 14:38:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-04 14:38:23,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-06-04 14:38:23,981 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 590 flow. Second operand 8 states and 231 transitions. [2024-06-04 14:38:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 190 transitions, 1670 flow [2024-06-04 14:38:24,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 190 transitions, 1507 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:24,033 INFO L231 Difference]: Finished difference. Result has 87 places, 123 transitions, 941 flow [2024-06-04 14:38:24,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2024-06-04 14:38:24,034 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-04 14:38:24,034 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 941 flow [2024-06-04 14:38:24,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:24,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:24,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:24,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:38:24,035 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)] === [2024-06-04 14:38:24,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:24,035 INFO L85 PathProgramCache]: Analyzing trace with hash -610406743, now seen corresponding path program 2 times [2024-06-04 14:38:24,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:24,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95669728] [2024-06-04 14:38:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:24,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95669728] [2024-06-04 14:38:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95669728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742825904] [2024-06-04 14:38:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:25,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:25,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 941 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:25,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:27,084 INFO L124 PetriNetUnfolderBase]: 11857/16523 cut-off events. [2024-06-04 14:38:27,085 INFO L125 PetriNetUnfolderBase]: For 107377/107386 co-relation queries the response was YES. [2024-06-04 14:38:27,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71266 conditions, 16523 events. 11857/16523 cut-off events. For 107377/107386 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 92808 event pairs, 5043 based on Foata normal form. 24/16534 useless extension candidates. Maximal degree in co-relation 71231. Up to 15002 conditions per place. [2024-06-04 14:38:27,179 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 103 selfloop transitions, 81 changer transitions 0/191 dead transitions. [2024-06-04 14:38:27,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1813 flow [2024-06-04 14:38:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-04 14:38:27,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 14:38:27,181 INFO L175 Difference]: Start difference. First operand has 87 places, 123 transitions, 941 flow. Second operand 7 states and 199 transitions. [2024-06-04 14:38:27,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1813 flow [2024-06-04 14:38:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 191 transitions, 1719 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 14:38:27,241 INFO L231 Difference]: Finished difference. Result has 94 places, 144 transitions, 1314 flow [2024-06-04 14:38:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=94, PETRI_TRANSITIONS=144} [2024-06-04 14:38:27,241 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-04 14:38:27,241 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 144 transitions, 1314 flow [2024-06-04 14:38:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:38:27,242 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)] === [2024-06-04 14:38:27,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1934136411, now seen corresponding path program 3 times [2024-06-04 14:38:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094077365] [2024-06-04 14:38:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:28,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094077365] [2024-06-04 14:38:28,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094077365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:28,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:28,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059835315] [2024-06-04 14:38:28,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:28,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:28,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 144 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:28,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:28,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:28,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:30,151 INFO L124 PetriNetUnfolderBase]: 11939/16641 cut-off events. [2024-06-04 14:38:30,152 INFO L125 PetriNetUnfolderBase]: For 140968/140975 co-relation queries the response was YES. [2024-06-04 14:38:30,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78328 conditions, 16641 events. 11939/16641 cut-off events. For 140968/140975 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 93400 event pairs, 5069 based on Foata normal form. 13/16635 useless extension candidates. Maximal degree in co-relation 78289. Up to 15054 conditions per place. [2024-06-04 14:38:30,273 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-04 14:38:30,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 207 transitions, 2258 flow [2024-06-04 14:38:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-04 14:38:30,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-04 14:38:30,275 INFO L175 Difference]: Start difference. First operand has 94 places, 144 transitions, 1314 flow. Second operand 7 states and 197 transitions. [2024-06-04 14:38:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 207 transitions, 2258 flow [2024-06-04 14:38:30,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 207 transitions, 2131 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:30,358 INFO L231 Difference]: Finished difference. Result has 99 places, 160 transitions, 1597 flow [2024-06-04 14:38:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=99, PETRI_TRANSITIONS=160} [2024-06-04 14:38:30,358 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-04 14:38:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 160 transitions, 1597 flow [2024-06-04 14:38:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:30,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:30,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:38:30,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:30,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash -605758603, now seen corresponding path program 4 times [2024-06-04 14:38:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:30,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262110445] [2024-06-04 14:38:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262110445] [2024-06-04 14:38:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262110445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:31,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:31,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063784366] [2024-06-04 14:38:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:31,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:31,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 160 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:31,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:31,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:31,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:33,354 INFO L124 PetriNetUnfolderBase]: 11954/16668 cut-off events. [2024-06-04 14:38:33,354 INFO L125 PetriNetUnfolderBase]: For 174760/174777 co-relation queries the response was YES. [2024-06-04 14:38:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82717 conditions, 16668 events. 11954/16668 cut-off events. For 174760/174777 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 93619 event pairs, 5043 based on Foata normal form. 22/16671 useless extension candidates. Maximal degree in co-relation 82676. Up to 15072 conditions per place. [2024-06-04 14:38:33,486 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 97 selfloop transitions, 108 changer transitions 0/212 dead transitions. [2024-06-04 14:38:33,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 212 transitions, 2418 flow [2024-06-04 14:38:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-04 14:38:33,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 14:38:33,487 INFO L175 Difference]: Start difference. First operand has 99 places, 160 transitions, 1597 flow. Second operand 7 states and 195 transitions. [2024-06-04 14:38:33,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 212 transitions, 2418 flow [2024-06-04 14:38:33,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 212 transitions, 2223 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:33,608 INFO L231 Difference]: Finished difference. Result has 103 places, 168 transitions, 1750 flow [2024-06-04 14:38:33,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=103, PETRI_TRANSITIONS=168} [2024-06-04 14:38:33,608 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-04 14:38:33,608 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 168 transitions, 1750 flow [2024-06-04 14:38:33,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:33,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:33,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:33,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:38:33,609 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)] === [2024-06-04 14:38:33,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:33,610 INFO L85 PathProgramCache]: Analyzing trace with hash -433029145, now seen corresponding path program 1 times [2024-06-04 14:38:33,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:33,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900206138] [2024-06-04 14:38:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:33,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:34,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900206138] [2024-06-04 14:38:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900206138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:34,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:34,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:34,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665542607] [2024-06-04 14:38:34,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:34,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:34,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:34,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 168 transitions, 1750 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) [2024-06-04 14:38:34,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:34,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:34,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:36,290 INFO L124 PetriNetUnfolderBase]: 10579/15011 cut-off events. [2024-06-04 14:38:36,290 INFO L125 PetriNetUnfolderBase]: For 159203/159208 co-relation queries the response was YES. [2024-06-04 14:38:36,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74725 conditions, 15011 events. 10579/15011 cut-off events. For 159203/159208 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 86075 event pairs, 4299 based on Foata normal form. 12/14931 useless extension candidates. Maximal degree in co-relation 74682. Up to 14195 conditions per place. [2024-06-04 14:38:36,420 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 174 selfloop transitions, 26 changer transitions 0/208 dead transitions. [2024-06-04 14:38:36,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 208 transitions, 2400 flow [2024-06-04 14:38:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-04 14:38:36,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-04 14:38:36,421 INFO L175 Difference]: Start difference. First operand has 103 places, 168 transitions, 1750 flow. Second operand 7 states and 192 transitions. [2024-06-04 14:38:36,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 208 transitions, 2400 flow [2024-06-04 14:38:36,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 208 transitions, 2210 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:36,552 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1677 flow [2024-06-04 14:38:36,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-04 14:38:36,553 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-04 14:38:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1677 flow [2024-06-04 14:38:36,553 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) [2024-06-04 14:38:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:36,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:36,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:38:36,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:36,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1670425151, now seen corresponding path program 1 times [2024-06-04 14:38:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:36,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244788724] [2024-06-04 14:38:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:36,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244788724] [2024-06-04 14:38:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244788724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:37,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584519677] [2024-06-04 14:38:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:37,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:37,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1677 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:37,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:37,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:37,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:39,051 INFO L124 PetriNetUnfolderBase]: 10572/14997 cut-off events. [2024-06-04 14:38:39,051 INFO L125 PetriNetUnfolderBase]: For 174301/174303 co-relation queries the response was YES. [2024-06-04 14:38:39,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76507 conditions, 14997 events. 10572/14997 cut-off events. For 174301/174303 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 85846 event pairs, 4456 based on Foata normal form. 2/14906 useless extension candidates. Maximal degree in co-relation 76463. Up to 14310 conditions per place. [2024-06-04 14:38:39,189 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 168 selfloop transitions, 10 changer transitions 0/186 dead transitions. [2024-06-04 14:38:39,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 2077 flow [2024-06-04 14:38:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 14:38:39,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-04 14:38:39,190 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1677 flow. Second operand 5 states and 129 transitions. [2024-06-04 14:38:39,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 2077 flow [2024-06-04 14:38:39,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1982 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:38:39,345 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1611 flow [2024-06-04 14:38:39,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1611, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-04 14:38:39,346 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-04 14:38:39,346 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1611 flow [2024-06-04 14:38:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:39,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:39,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:38:39,347 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)] === [2024-06-04 14:38:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1742743765, now seen corresponding path program 1 times [2024-06-04 14:38:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085724951] [2024-06-04 14:38:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:40,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:40,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085724951] [2024-06-04 14:38:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085724951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:40,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:40,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139158420] [2024-06-04 14:38:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:40,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1611 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:40,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:40,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:40,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:42,436 INFO L124 PetriNetUnfolderBase]: 12053/16835 cut-off events. [2024-06-04 14:38:42,436 INFO L125 PetriNetUnfolderBase]: For 220016/220031 co-relation queries the response was YES. [2024-06-04 14:38:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86830 conditions, 16835 events. 12053/16835 cut-off events. For 220016/220031 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 94798 event pairs, 5134 based on Foata normal form. 24/16843 useless extension candidates. Maximal degree in co-relation 86785. Up to 15181 conditions per place. [2024-06-04 14:38:42,797 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 118 selfloop transitions, 112 changer transitions 0/237 dead transitions. [2024-06-04 14:38:42,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 237 transitions, 2661 flow [2024-06-04 14:38:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-04 14:38:42,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 14:38:42,799 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1611 flow. Second operand 7 states and 201 transitions. [2024-06-04 14:38:42,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 237 transitions, 2661 flow [2024-06-04 14:38:42,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 237 transitions, 2628 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:42,915 INFO L231 Difference]: Finished difference. Result has 111 places, 189 transitions, 2157 flow [2024-06-04 14:38:42,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2157, PETRI_PLACES=111, PETRI_TRANSITIONS=189} [2024-06-04 14:38:42,917 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-04 14:38:42,917 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 189 transitions, 2157 flow [2024-06-04 14:38:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:42,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:42,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:38:42,918 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)] === [2024-06-04 14:38:42,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1742738185, now seen corresponding path program 2 times [2024-06-04 14:38:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499215765] [2024-06-04 14:38:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:42,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499215765] [2024-06-04 14:38:43,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499215765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:43,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:43,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579502093] [2024-06-04 14:38:43,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:43,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:43,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 189 transitions, 2157 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:43,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:43,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:43,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:46,240 INFO L124 PetriNetUnfolderBase]: 12133/16979 cut-off events. [2024-06-04 14:38:46,240 INFO L125 PetriNetUnfolderBase]: For 259650/259679 co-relation queries the response was YES. [2024-06-04 14:38:46,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93367 conditions, 16979 events. 12133/16979 cut-off events. For 259650/259679 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 96101 event pairs, 5122 based on Foata normal form. 36/16999 useless extension candidates. Maximal degree in co-relation 93320. Up to 15259 conditions per place. [2024-06-04 14:38:46,404 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 117 selfloop transitions, 117 changer transitions 0/241 dead transitions. [2024-06-04 14:38:46,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 241 transitions, 3067 flow [2024-06-04 14:38:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-04 14:38:46,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 14:38:46,409 INFO L175 Difference]: Start difference. First operand has 111 places, 189 transitions, 2157 flow. Second operand 7 states and 195 transitions. [2024-06-04 14:38:46,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 241 transitions, 3067 flow [2024-06-04 14:38:46,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 241 transitions, 2906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:46,619 INFO L231 Difference]: Finished difference. Result has 115 places, 198 transitions, 2382 flow [2024-06-04 14:38:46,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2382, PETRI_PLACES=115, PETRI_TRANSITIONS=198} [2024-06-04 14:38:46,620 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-04 14:38:46,620 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 198 transitions, 2382 flow [2024-06-04 14:38:46,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:46,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:46,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:46,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:38:46,624 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:46,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -680207813, now seen corresponding path program 3 times [2024-06-04 14:38:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284402914] [2024-06-04 14:38:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:46,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:47,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284402914] [2024-06-04 14:38:47,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284402914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:47,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:47,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584398851] [2024-06-04 14:38:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:47,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:47,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 198 transitions, 2382 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:47,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:47,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:47,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:49,965 INFO L124 PetriNetUnfolderBase]: 12148/17017 cut-off events. [2024-06-04 14:38:49,965 INFO L125 PetriNetUnfolderBase]: For 283529/283612 co-relation queries the response was YES. [2024-06-04 14:38:50,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94704 conditions, 17017 events. 12148/17017 cut-off events. For 283529/283612 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 96597 event pairs, 5169 based on Foata normal form. 66/17041 useless extension candidates. Maximal degree in co-relation 94656. Up to 15282 conditions per place. [2024-06-04 14:38:50,119 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 124 changer transitions 0/244 dead transitions. [2024-06-04 14:38:50,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 244 transitions, 3192 flow [2024-06-04 14:38:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 14:38:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:38:50,129 INFO L175 Difference]: Start difference. First operand has 115 places, 198 transitions, 2382 flow. Second operand 7 states and 189 transitions. [2024-06-04 14:38:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 244 transitions, 3192 flow [2024-06-04 14:38:50,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 244 transitions, 2988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:50,311 INFO L231 Difference]: Finished difference. Result has 118 places, 207 transitions, 2586 flow [2024-06-04 14:38:50,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2586, PETRI_PLACES=118, PETRI_TRANSITIONS=207} [2024-06-04 14:38:50,317 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-04 14:38:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 207 transitions, 2586 flow [2024-06-04 14:38:50,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:50,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:50,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:50,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:38:50,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -243569913, now seen corresponding path program 1 times [2024-06-04 14:38:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699786993] [2024-06-04 14:38:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:51,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699786993] [2024-06-04 14:38:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699786993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:51,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:51,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:51,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346255188] [2024-06-04 14:38:51,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:51,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:51,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:51,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 207 transitions, 2586 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:51,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:51,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:51,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:53,212 INFO L124 PetriNetUnfolderBase]: 10739/15415 cut-off events. [2024-06-04 14:38:53,212 INFO L125 PetriNetUnfolderBase]: For 266765/266767 co-relation queries the response was YES. [2024-06-04 14:38:53,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86728 conditions, 15415 events. 10739/15415 cut-off events. For 266765/266767 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89090 event pairs, 4440 based on Foata normal form. 4/15402 useless extension candidates. Maximal degree in co-relation 86679. Up to 14517 conditions per place. [2024-06-04 14:38:53,339 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 208 selfloop transitions, 14 changer transitions 0/230 dead transitions. [2024-06-04 14:38:53,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 230 transitions, 3130 flow [2024-06-04 14:38:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:38:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-04 14:38:53,342 INFO L175 Difference]: Start difference. First operand has 118 places, 207 transitions, 2586 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:38:53,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 230 transitions, 3130 flow [2024-06-04 14:38:53,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 230 transitions, 2918 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:53,560 INFO L231 Difference]: Finished difference. Result has 120 places, 211 transitions, 2461 flow [2024-06-04 14:38:53,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2461, PETRI_PLACES=120, PETRI_TRANSITIONS=211} [2024-06-04 14:38:53,560 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-04 14:38:53,561 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 211 transitions, 2461 flow [2024-06-04 14:38:53,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:53,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:53,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:38:53,561 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)] === [2024-06-04 14:38:53,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1691366924, now seen corresponding path program 1 times [2024-06-04 14:38:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:53,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589631020] [2024-06-04 14:38:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:53,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:54,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589631020] [2024-06-04 14:38:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589631020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:54,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:54,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873885216] [2024-06-04 14:38:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:54,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:54,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:54,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 211 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:54,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:54,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:54,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:56,798 INFO L124 PetriNetUnfolderBase]: 11575/16297 cut-off events. [2024-06-04 14:38:56,798 INFO L125 PetriNetUnfolderBase]: For 326871/326947 co-relation queries the response was YES. [2024-06-04 14:38:56,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95424 conditions, 16297 events. 11575/16297 cut-off events. For 326871/326947 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 92435 event pairs, 3697 based on Foata normal form. 54/16321 useless extension candidates. Maximal degree in co-relation 95373. Up to 15001 conditions per place. [2024-06-04 14:38:56,939 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 182 selfloop transitions, 41 changer transitions 0/257 dead transitions. [2024-06-04 14:38:56,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 257 transitions, 3257 flow [2024-06-04 14:38:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-04 14:38:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-04 14:38:56,942 INFO L175 Difference]: Start difference. First operand has 120 places, 211 transitions, 2461 flow. Second operand 7 states and 193 transitions. [2024-06-04 14:38:56,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 257 transitions, 3257 flow [2024-06-04 14:38:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 257 transitions, 3200 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:57,157 INFO L231 Difference]: Finished difference. Result has 123 places, 217 transitions, 2622 flow [2024-06-04 14:38:57,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=123, PETRI_TRANSITIONS=217} [2024-06-04 14:38:57,158 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 14:38:57,158 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 217 transitions, 2622 flow [2024-06-04 14:38:57,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:57,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:57,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:57,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:38:57,160 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)] === [2024-06-04 14:38:57,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1356558788, now seen corresponding path program 2 times [2024-06-04 14:38:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956940070] [2024-06-04 14:38:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956940070] [2024-06-04 14:38:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956940070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:58,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:58,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:58,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718257326] [2024-06-04 14:38:58,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:58,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:58,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:58,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:58,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:58,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 217 transitions, 2622 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:58,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:58,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:58,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:00,406 INFO L124 PetriNetUnfolderBase]: 11550/16257 cut-off events. [2024-06-04 14:39:00,407 INFO L125 PetriNetUnfolderBase]: For 361057/361117 co-relation queries the response was YES. [2024-06-04 14:39:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98120 conditions, 16257 events. 11550/16257 cut-off events. For 361057/361117 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 92193 event pairs, 4414 based on Foata normal form. 38/16265 useless extension candidates. Maximal degree in co-relation 98068. Up to 15116 conditions per place. [2024-06-04 14:39:00,553 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 181 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-04 14:39:00,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 3194 flow [2024-06-04 14:39:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 14:39:00,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-04 14:39:00,555 INFO L175 Difference]: Start difference. First operand has 123 places, 217 transitions, 2622 flow. Second operand 7 states and 190 transitions. [2024-06-04 14:39:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 3194 flow [2024-06-04 14:39:00,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 3058 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 14:39:00,922 INFO L231 Difference]: Finished difference. Result has 127 places, 217 transitions, 2578 flow [2024-06-04 14:39:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2578, PETRI_PLACES=127, PETRI_TRANSITIONS=217} [2024-06-04 14:39:00,923 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-04 14:39:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 217 transitions, 2578 flow [2024-06-04 14:39:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:00,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:39:00,924 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)] === [2024-06-04 14:39:00,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1799196648, now seen corresponding path program 1 times [2024-06-04 14:39:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23613810] [2024-06-04 14:39:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:01,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23613810] [2024-06-04 14:39:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23613810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:01,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:01,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:01,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508164406] [2024-06-04 14:39:01,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:01,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:01,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:01,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:01,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:01,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:01,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 217 transitions, 2578 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:01,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:01,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:04,357 INFO L124 PetriNetUnfolderBase]: 12480/17384 cut-off events. [2024-06-04 14:39:04,357 INFO L125 PetriNetUnfolderBase]: For 408203/408219 co-relation queries the response was YES. [2024-06-04 14:39:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105418 conditions, 17384 events. 12480/17384 cut-off events. For 408203/408219 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97179 event pairs, 4696 based on Foata normal form. 62/17439 useless extension candidates. Maximal degree in co-relation 105364. Up to 15366 conditions per place. [2024-06-04 14:39:04,540 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 133 changer transitions 0/275 dead transitions. [2024-06-04 14:39:04,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 275 transitions, 3606 flow [2024-06-04 14:39:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:39:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:39:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-04 14:39:04,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-04 14:39:04,542 INFO L175 Difference]: Start difference. First operand has 127 places, 217 transitions, 2578 flow. Second operand 8 states and 226 transitions. [2024-06-04 14:39:04,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 275 transitions, 3606 flow [2024-06-04 14:39:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 275 transitions, 3514 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:05,067 INFO L231 Difference]: Finished difference. Result has 129 places, 221 transitions, 2850 flow [2024-06-04 14:39:05,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=129, PETRI_TRANSITIONS=221} [2024-06-04 14:39:05,068 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-04 14:39:05,068 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 221 transitions, 2850 flow [2024-06-04 14:39:05,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:05,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:05,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:05,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:39:05,069 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)] === [2024-06-04 14:39:05,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash 168953278, now seen corresponding path program 1 times [2024-06-04 14:39:05,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:05,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896515030] [2024-06-04 14:39:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896515030] [2024-06-04 14:39:05,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896515030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:05,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:05,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:39:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521428019] [2024-06-04 14:39:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:05,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:39:05,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:39:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:39:05,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 221 transitions, 2850 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:08,275 INFO L124 PetriNetUnfolderBase]: 12503/17417 cut-off events. [2024-06-04 14:39:08,275 INFO L125 PetriNetUnfolderBase]: For 440572/440588 co-relation queries the response was YES. [2024-06-04 14:39:08,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110444 conditions, 17417 events. 12503/17417 cut-off events. For 440572/440588 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97156 event pairs, 4733 based on Foata normal form. 18/17433 useless extension candidates. Maximal degree in co-relation 110389. Up to 16855 conditions per place. [2024-06-04 14:39:08,440 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 221 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2024-06-04 14:39:08,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 257 transitions, 3672 flow [2024-06-04 14:39:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:39:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:39:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:39:08,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-04 14:39:08,441 INFO L175 Difference]: Start difference. First operand has 129 places, 221 transitions, 2850 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:39:08,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 257 transitions, 3672 flow [2024-06-04 14:39:08,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 257 transitions, 3350 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:08,822 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 2736 flow [2024-06-04 14:39:08,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2736, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2024-06-04 14:39:08,823 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-04 14:39:08,823 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 2736 flow [2024-06-04 14:39:08,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:08,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:08,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:39:08,823 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:08,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 462299782, now seen corresponding path program 2 times [2024-06-04 14:39:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:08,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782164446] [2024-06-04 14:39:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:09,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:09,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782164446] [2024-06-04 14:39:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782164446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:09,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:09,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168720215] [2024-06-04 14:39:09,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:09,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:09,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 2736 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:09,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:09,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:12,575 INFO L124 PetriNetUnfolderBase]: 12574/17508 cut-off events. [2024-06-04 14:39:12,575 INFO L125 PetriNetUnfolderBase]: For 460853/460873 co-relation queries the response was YES. [2024-06-04 14:39:12,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109864 conditions, 17508 events. 12574/17508 cut-off events. For 460853/460873 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97695 event pairs, 4715 based on Foata normal form. 26/17511 useless extension candidates. Maximal degree in co-relation 109808. Up to 15821 conditions per place. [2024-06-04 14:39:13,030 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 125 selfloop transitions, 148 changer transitions 0/280 dead transitions. [2024-06-04 14:39:13,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 280 transitions, 3702 flow [2024-06-04 14:39:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:39:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:39:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-04 14:39:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-04 14:39:13,045 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 2736 flow. Second operand 8 states and 219 transitions. [2024-06-04 14:39:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 280 transitions, 3702 flow [2024-06-04 14:39:13,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 280 transitions, 3368 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:13,578 INFO L231 Difference]: Finished difference. Result has 131 places, 232 transitions, 2800 flow [2024-06-04 14:39:13,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2800, PETRI_PLACES=131, PETRI_TRANSITIONS=232} [2024-06-04 14:39:13,579 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-04 14:39:13,579 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 232 transitions, 2800 flow [2024-06-04 14:39:13,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:13,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:13,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:13,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:39:13,580 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:13,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1964835782, now seen corresponding path program 3 times [2024-06-04 14:39:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:13,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960738498] [2024-06-04 14:39:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:13,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960738498] [2024-06-04 14:39:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960738498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:14,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:14,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864380312] [2024-06-04 14:39:14,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:14,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:14,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:14,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 232 transitions, 2800 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:14,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:14,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:14,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:17,508 INFO L124 PetriNetUnfolderBase]: 12645/17599 cut-off events. [2024-06-04 14:39:17,509 INFO L125 PetriNetUnfolderBase]: For 498523/498535 co-relation queries the response was YES. [2024-06-04 14:39:17,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115010 conditions, 17599 events. 12645/17599 cut-off events. For 498523/498535 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98061 event pairs, 4743 based on Foata normal form. 18/17594 useless extension candidates. Maximal degree in co-relation 114954. Up to 15918 conditions per place. [2024-06-04 14:39:17,743 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 138 selfloop transitions, 140 changer transitions 0/285 dead transitions. [2024-06-04 14:39:17,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 285 transitions, 3884 flow [2024-06-04 14:39:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:39:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:39:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-04 14:39:17,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-04 14:39:17,745 INFO L175 Difference]: Start difference. First operand has 131 places, 232 transitions, 2800 flow. Second operand 8 states and 220 transitions. [2024-06-04 14:39:17,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 285 transitions, 3884 flow [2024-06-04 14:39:18,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 285 transitions, 3520 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:18,089 INFO L231 Difference]: Finished difference. Result has 133 places, 236 transitions, 2826 flow [2024-06-04 14:39:18,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2826, PETRI_PLACES=133, PETRI_TRANSITIONS=236} [2024-06-04 14:39:18,090 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-04 14:39:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 236 transitions, 2826 flow [2024-06-04 14:39:18,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:18,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:39:18,090 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:18,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 470870662, now seen corresponding path program 4 times [2024-06-04 14:39:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123279656] [2024-06-04 14:39:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123279656] [2024-06-04 14:39:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123279656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:19,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:19,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124686175] [2024-06-04 14:39:19,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:19,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:19,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 236 transitions, 2826 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:21,851 INFO L124 PetriNetUnfolderBase]: 12665/17637 cut-off events. [2024-06-04 14:39:21,851 INFO L125 PetriNetUnfolderBase]: For 541527/541547 co-relation queries the response was YES. [2024-06-04 14:39:21,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117886 conditions, 17637 events. 12665/17637 cut-off events. For 541527/541547 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98483 event pairs, 4283 based on Foata normal form. 26/17640 useless extension candidates. Maximal degree in co-relation 117829. Up to 15362 conditions per place. [2024-06-04 14:39:22,184 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 121 selfloop transitions, 163 changer transitions 0/291 dead transitions. [2024-06-04 14:39:22,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 291 transitions, 3854 flow [2024-06-04 14:39:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:39:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:39:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:39:22,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-04 14:39:22,185 INFO L175 Difference]: Start difference. First operand has 133 places, 236 transitions, 2826 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:39:22,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 291 transitions, 3854 flow [2024-06-04 14:39:22,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 291 transitions, 3498 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:22,551 INFO L231 Difference]: Finished difference. Result has 135 places, 240 transitions, 2913 flow [2024-06-04 14:39:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2913, PETRI_PLACES=135, PETRI_TRANSITIONS=240} [2024-06-04 14:39:22,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-04 14:39:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 240 transitions, 2913 flow [2024-06-04 14:39:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:22,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:22,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:39:22,553 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1039255648, now seen corresponding path program 2 times [2024-06-04 14:39:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696161800] [2024-06-04 14:39:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:23,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:23,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696161800] [2024-06-04 14:39:23,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696161800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:23,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:23,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:39:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268517002] [2024-06-04 14:39:23,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:39:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:39:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:39:23,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:23,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 240 transitions, 2913 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:23,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:23,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:23,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:26,159 INFO L124 PetriNetUnfolderBase]: 12654/17638 cut-off events. [2024-06-04 14:39:26,160 INFO L125 PetriNetUnfolderBase]: For 581381/581403 co-relation queries the response was YES. [2024-06-04 14:39:26,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121031 conditions, 17638 events. 12654/17638 cut-off events. For 581381/581403 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 98647 event pairs, 4738 based on Foata normal form. 23/17658 useless extension candidates. Maximal degree in co-relation 120973. Up to 17074 conditions per place. [2024-06-04 14:39:26,337 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 226 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-04 14:39:26,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 262 transitions, 3505 flow [2024-06-04 14:39:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:39:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:39:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:39:26,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-04 14:39:26,338 INFO L175 Difference]: Start difference. First operand has 135 places, 240 transitions, 2913 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:39:26,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 262 transitions, 3505 flow [2024-06-04 14:39:26,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 262 transitions, 3068 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:26,805 INFO L231 Difference]: Finished difference. Result has 135 places, 240 transitions, 2546 flow [2024-06-04 14:39:26,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2546, PETRI_PLACES=135, PETRI_TRANSITIONS=240} [2024-06-04 14:39:26,806 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-04 14:39:26,806 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 240 transitions, 2546 flow [2024-06-04 14:39:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:39:26,807 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:26,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 174673150, now seen corresponding path program 1 times [2024-06-04 14:39:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750293016] [2024-06-04 14:39:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750293016] [2024-06-04 14:39:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750293016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:27,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:27,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:39:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852614151] [2024-06-04 14:39:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:39:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:39:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:39:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:39:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 240 transitions, 2546 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:39:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:30,272 INFO L124 PetriNetUnfolderBase]: 11268/16144 cut-off events. [2024-06-04 14:39:30,272 INFO L125 PetriNetUnfolderBase]: For 516632/516640 co-relation queries the response was YES. [2024-06-04 14:39:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107461 conditions, 16144 events. 11268/16144 cut-off events. For 516632/516640 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 93809 event pairs, 4125 based on Foata normal form. 8/16119 useless extension candidates. Maximal degree in co-relation 107402. Up to 15224 conditions per place. [2024-06-04 14:39:30,462 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 234 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-04 14:39:30,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 267 transitions, 3290 flow [2024-06-04 14:39:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:39:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:39:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:39:30,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-04 14:39:30,464 INFO L175 Difference]: Start difference. First operand has 135 places, 240 transitions, 2546 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:39:30,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 267 transitions, 3290 flow [2024-06-04 14:39:30,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 267 transitions, 3209 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:30,868 INFO L231 Difference]: Finished difference. Result has 136 places, 244 transitions, 2580 flow [2024-06-04 14:39:30,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2580, PETRI_PLACES=136, PETRI_TRANSITIONS=244} [2024-06-04 14:39:30,868 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-06-04 14:39:30,869 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 244 transitions, 2580 flow [2024-06-04 14:39:30,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:30,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:30,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:30,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:39:30,869 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:30,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1039261600, now seen corresponding path program 2 times [2024-06-04 14:39:30,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200166778] [2024-06-04 14:39:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:31,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200166778] [2024-06-04 14:39:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200166778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:31,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:39:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660641420] [2024-06-04 14:39:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:39:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:39:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:39:31,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:39:31,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 244 transitions, 2580 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:31,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:31,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:39:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:34,261 INFO L124 PetriNetUnfolderBase]: 11222/16069 cut-off events. [2024-06-04 14:39:34,262 INFO L125 PetriNetUnfolderBase]: For 541550/541552 co-relation queries the response was YES. [2024-06-04 14:39:34,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108123 conditions, 16069 events. 11222/16069 cut-off events. For 541550/541552 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 93257 event pairs, 4137 based on Foata normal form. 2/16035 useless extension candidates. Maximal degree in co-relation 108063. Up to 15162 conditions per place. [2024-06-04 14:39:34,402 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 228 selfloop transitions, 26 changer transitions 0/262 dead transitions. [2024-06-04 14:39:34,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 262 transitions, 3144 flow [2024-06-04 14:39:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:39:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:39:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:39:34,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-04 14:39:34,404 INFO L175 Difference]: Start difference. First operand has 136 places, 244 transitions, 2580 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:39:34,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 262 transitions, 3144 flow [2024-06-04 14:39:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 262 transitions, 3089 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:39:34,778 INFO L231 Difference]: Finished difference. Result has 139 places, 244 transitions, 2586 flow [2024-06-04 14:39:34,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2586, PETRI_PLACES=139, PETRI_TRANSITIONS=244} [2024-06-04 14:39:34,779 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-04 14:39:34,779 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 244 transitions, 2586 flow [2024-06-04 14:39:34,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:34,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:34,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:39:34,780 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)] === [2024-06-04 14:39:34,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:34,780 INFO L85 PathProgramCache]: Analyzing trace with hash 892768942, now seen corresponding path program 1 times [2024-06-04 14:39:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:34,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294838727] [2024-06-04 14:39:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:34,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294838727] [2024-06-04 14:39:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294838727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:35,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:35,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962334323] [2024-06-04 14:39:35,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:35,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 244 transitions, 2586 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand