./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe014_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:11:41,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:11:41,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:11:41,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:11:41,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:11:41,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:11:41,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:11:41,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:11:41,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:11:41,996 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:11:41,997 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:11:41,997 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:11:41,998 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:11:41,999 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:11:41,999 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:11:41,999 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:11:41,999 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:11:41,999 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:11:41,999 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:11:42,000 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:11:42,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:11:42,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:11:42,001 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:11:42,002 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:11:42,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:11:42,003 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:11:42,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:11:42,004 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:11:42,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:11:42,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:11:42,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:11:42,172 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:11:42,173 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:11:42,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_power.oepc.yml/witness.yml [2024-06-14 13:11:42,367 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:11:42,372 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:11:42,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-14 13:11:43,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:11:43,499 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:11:43,499 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-14 13:11:43,510 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed15d530/40a18ee3164f4811b9aa4cfdb92cac1b/FLAGa74378da8 [2024-06-14 13:11:43,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed15d530/40a18ee3164f4811b9aa4cfdb92cac1b [2024-06-14 13:11:43,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:11:43,522 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:11:43,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:11:43,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:11:43,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:11:43,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:11:42" (1/2) ... [2024-06-14 13:11:43,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7025a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:11:43, skipping insertion in model container [2024-06-14 13:11:43,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:11:42" (1/2) ... [2024-06-14 13:11:43,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45925ac7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:11:43, skipping insertion in model container [2024-06-14 13:11:43,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:11:43" (2/2) ... [2024-06-14 13:11:43,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7025a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:43, skipping insertion in model container [2024-06-14 13:11:43,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:11:43" (2/2) ... [2024-06-14 13:11:43,530 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:11:43,636 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:11:43,637 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:11:43,637 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 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 || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:11:43,637 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:11:43,637 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:11:43,637 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-14 13:11:43,674 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:11:43,935 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:11:43,949 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:11:44,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:11:44,108 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:11:44,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44 WrapperNode [2024-06-14 13:11:44,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:11:44,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:11:44,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:11:44,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:11:44,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,192 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-14 13:11:44,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:11:44,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:11:44,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:11:44,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:11:44,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,206 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,219 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:11:44,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:11:44,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:11:44,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:11:44,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:11:44,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (1/1) ... [2024-06-14 13:11:44,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:11:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:11:44,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:11:44,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:11:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:11:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:11:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:11:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:11:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:11:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:11:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:11:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:11:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:11:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:11:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:11:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:11:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:11:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:11:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:11:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:11:44,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:11:44,309 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:11:44,467 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:11:44,469 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:11:44,828 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:11:44,829 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:11:45,181 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:11:45,181 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:11:45,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:11:45 BoogieIcfgContainer [2024-06-14 13:11:45,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:11:45,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:11:45,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:11:45,185 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:11:45,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:11:42" (1/4) ... [2024-06-14 13:11:45,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea47258 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:11:45, skipping insertion in model container [2024-06-14 13:11:45,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:11:43" (2/4) ... [2024-06-14 13:11:45,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea47258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:11:45, skipping insertion in model container [2024-06-14 13:11:45,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:11:44" (3/4) ... [2024-06-14 13:11:45,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea47258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:11:45, skipping insertion in model container [2024-06-14 13:11:45,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:11:45" (4/4) ... [2024-06-14 13:11:45,186 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_power.oepc.i [2024-06-14 13:11:45,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:11:45,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:11:45,199 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:11:45,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:11:45,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:11:45,287 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:11:45,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:11:45,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:11:45,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:11:45,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:11:45,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:11:45,301 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;@454efadb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:11:45,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:11:45,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:11:45,306 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:11:45,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:11:45,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:45,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:11:45,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:45,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash 872555631, now seen corresponding path program 1 times [2024-06-14 13:11:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367830578] [2024-06-14 13:11:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367830578] [2024-06-14 13:11:46,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367830578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:46,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:46,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:11:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692545643] [2024-06-14 13:11:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:11:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:11:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:11:47,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:11:47,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:47,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:47,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:11:47,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:47,431 INFO L124 PetriNetUnfolderBase]: 770/1240 cut-off events. [2024-06-14 13:11:47,431 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:11:47,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2485 conditions, 1240 events. 770/1240 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5908 event pairs, 479 based on Foata normal form. 1/1210 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-14 13:11:47,439 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:11:47,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-14 13:11:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:11:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:11:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 13:11:47,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 13:11:47,449 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 13:11:47,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-14 13:11:47,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:47,453 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:11:47,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:11:47,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:11:47,456 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:11:47,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:47,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:47,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:47,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:11:47,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:47,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1007366958, now seen corresponding path program 1 times [2024-06-14 13:11:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455471126] [2024-06-14 13:11:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455471126] [2024-06-14 13:11:49,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455471126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:49,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:11:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120789742] [2024-06-14 13:11:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:11:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:11:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:11:49,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:11:49,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:49,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:49,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:11:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:50,166 INFO L124 PetriNetUnfolderBase]: 764/1232 cut-off events. [2024-06-14 13:11:50,166 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-14 13:11:50,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1232 events. 764/1232 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5859 event pairs, 369 based on Foata normal form. 6/1235 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-14 13:11:50,172 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 13:11:50,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 260 flow [2024-06-14 13:11:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:11:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:11:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 13:11:50,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 13:11:50,174 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-14 13:11:50,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 260 flow [2024-06-14 13:11:50,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:11:50,176 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:11:50,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 13:11:50,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:11:50,177 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:11:50,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:50,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:50,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:50,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:11:50,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:50,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1533488034, now seen corresponding path program 1 times [2024-06-14 13:11:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:50,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550418510] [2024-06-14 13:11:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:50,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550418510] [2024-06-14 13:11:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550418510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:52,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:11:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013427568] [2024-06-14 13:11:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:11:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:11:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:11:52,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:11:52,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:52,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:52,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:11:52,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:53,633 INFO L124 PetriNetUnfolderBase]: 969/1527 cut-off events. [2024-06-14 13:11:53,633 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-14 13:11:53,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3918 conditions, 1527 events. 969/1527 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7215 event pairs, 305 based on Foata normal form. 12/1533 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-14 13:11:53,643 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:11:53,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-14 13:11:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:11:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 13:11:53,647 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:11:53,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-14 13:11:53,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:11:53,653 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 13:11:53,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 13:11:53,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 13:11:53,654 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 13:11:53,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:53,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:53,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:11:53,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:53,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 683874759, now seen corresponding path program 1 times [2024-06-14 13:11:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397709990] [2024-06-14 13:11:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:54,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397709990] [2024-06-14 13:11:54,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397709990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:54,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:54,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:11:54,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969369875] [2024-06-14 13:11:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:11:54,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:11:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:11:55,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:55,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:55,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:55,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:55,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:55,853 INFO L124 PetriNetUnfolderBase]: 1120/1740 cut-off events. [2024-06-14 13:11:55,853 INFO L125 PetriNetUnfolderBase]: For 1717/1717 co-relation queries the response was YES. [2024-06-14 13:11:55,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4890 conditions, 1740 events. 1120/1740 cut-off events. For 1717/1717 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8128 event pairs, 441 based on Foata normal form. 2/1739 useless extension candidates. Maximal degree in co-relation 4871. Up to 1665 conditions per place. [2024-06-14 13:11:55,864 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-14 13:11:55,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 390 flow [2024-06-14 13:11:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:11:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:11:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 13:11:55,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 13:11:55,866 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 93 transitions. [2024-06-14 13:11:55,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 390 flow [2024-06-14 13:11:55,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 359 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:55,871 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 230 flow [2024-06-14 13:11:55,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-06-14 13:11:55,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-14 13:11:55,873 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 230 flow [2024-06-14 13:11:55,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:55,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:55,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:55,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:11:55,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:55,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash -273852830, now seen corresponding path program 1 times [2024-06-14 13:11:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092363514] [2024-06-14 13:11:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092363514] [2024-06-14 13:11:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092363514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:11:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105974465] [2024-06-14 13:11:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:57,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:11:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:11:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:11:57,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:57,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:57,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:57,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:57,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:58,004 INFO L124 PetriNetUnfolderBase]: 1115/1738 cut-off events. [2024-06-14 13:11:58,005 INFO L125 PetriNetUnfolderBase]: For 2509/2512 co-relation queries the response was YES. [2024-06-14 13:11:58,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 1738 events. 1115/1738 cut-off events. For 2509/2512 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8161 event pairs, 457 based on Foata normal form. 4/1740 useless extension candidates. Maximal degree in co-relation 5368. Up to 1660 conditions per place. [2024-06-14 13:11:58,013 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-14 13:11:58,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 393 flow [2024-06-14 13:11:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:11:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:11:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:11:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:11:58,015 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 230 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:11:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 393 flow [2024-06-14 13:11:58,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 13:11:58,017 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 259 flow [2024-06-14 13:11:58,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 13:11:58,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:11:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 259 flow [2024-06-14 13:11:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:58,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:58,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:11:58,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:58,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash 478563500, now seen corresponding path program 1 times [2024-06-14 13:11:58,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:58,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470676628] [2024-06-14 13:11:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:00,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470676628] [2024-06-14 13:12:00,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470676628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:00,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:00,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:12:00,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690279204] [2024-06-14 13:12:00,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:12:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:00,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:12:00,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:12:00,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:00,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:00,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:00,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:00,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:01,319 INFO L124 PetriNetUnfolderBase]: 1128/1755 cut-off events. [2024-06-14 13:12:01,319 INFO L125 PetriNetUnfolderBase]: For 3324/3324 co-relation queries the response was YES. [2024-06-14 13:12:01,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 1755 events. 1128/1755 cut-off events. For 3324/3324 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8187 event pairs, 421 based on Foata normal form. 2/1753 useless extension candidates. Maximal degree in co-relation 5624. Up to 1609 conditions per place. [2024-06-14 13:12:01,327 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-14 13:12:01,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 541 flow [2024-06-14 13:12:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:12:01,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:12:01,328 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 259 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:12:01,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 541 flow [2024-06-14 13:12:01,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 529 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 13:12:01,334 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 344 flow [2024-06-14 13:12:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-14 13:12:01,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 13:12:01,337 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 344 flow [2024-06-14 13:12:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:01,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:12:01,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:01,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash 504573740, now seen corresponding path program 2 times [2024-06-14 13:12:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:01,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661137890] [2024-06-14 13:12:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661137890] [2024-06-14 13:12:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661137890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:03,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:12:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880960693] [2024-06-14 13:12:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:03,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:12:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:12:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:12:03,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:03,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 344 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:03,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:03,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:03,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:04,700 INFO L124 PetriNetUnfolderBase]: 1123/1743 cut-off events. [2024-06-14 13:12:04,700 INFO L125 PetriNetUnfolderBase]: For 4965/4972 co-relation queries the response was YES. [2024-06-14 13:12:04,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1743 events. 1123/1743 cut-off events. For 4965/4972 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8127 event pairs, 431 based on Foata normal form. 8/1745 useless extension candidates. Maximal degree in co-relation 6206. Up to 1606 conditions per place. [2024-06-14 13:12:04,713 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-14 13:12:04,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 598 flow [2024-06-14 13:12:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:12:04,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:12:04,714 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 344 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:12:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 598 flow [2024-06-14 13:12:04,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 576 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:12:04,720 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 392 flow [2024-06-14 13:12:04,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-14 13:12:04,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:12:04,720 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 392 flow [2024-06-14 13:12:04,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:04,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:04,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:04,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:12:04,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:04,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1355628693, now seen corresponding path program 1 times [2024-06-14 13:12:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:04,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692689319] [2024-06-14 13:12:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:06,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692689319] [2024-06-14 13:12:06,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692689319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:06,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:06,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093585963] [2024-06-14 13:12:06,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:06,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 392 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:06,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:08,445 INFO L124 PetriNetUnfolderBase]: 1335/2086 cut-off events. [2024-06-14 13:12:08,445 INFO L125 PetriNetUnfolderBase]: For 6801/6807 co-relation queries the response was YES. [2024-06-14 13:12:08,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 2086 events. 1335/2086 cut-off events. For 6801/6807 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10132 event pairs, 388 based on Foata normal form. 13/2098 useless extension candidates. Maximal degree in co-relation 7716. Up to 1791 conditions per place. [2024-06-14 13:12:08,457 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 106 selfloop transitions, 44 changer transitions 0/155 dead transitions. [2024-06-14 13:12:08,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 155 transitions, 1084 flow [2024-06-14 13:12:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:12:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:12:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-14 13:12:08,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:12:08,462 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 392 flow. Second operand 12 states and 220 transitions. [2024-06-14 13:12:08,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 155 transitions, 1084 flow [2024-06-14 13:12:08,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 155 transitions, 1051 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:08,469 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 679 flow [2024-06-14 13:12:08,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=679, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-14 13:12:08,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 13:12:08,472 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 679 flow [2024-06-14 13:12:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:08,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:08,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:12:08,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:08,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449893, now seen corresponding path program 2 times [2024-06-14 13:12:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977929219] [2024-06-14 13:12:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977929219] [2024-06-14 13:12:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977929219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:11,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661530242] [2024-06-14 13:12:11,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:11,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:11,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:11,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:12,373 INFO L124 PetriNetUnfolderBase]: 1379/2157 cut-off events. [2024-06-14 13:12:12,373 INFO L125 PetriNetUnfolderBase]: For 11505/11513 co-relation queries the response was YES. [2024-06-14 13:12:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9413 conditions, 2157 events. 1379/2157 cut-off events. For 11505/11513 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10549 event pairs, 364 based on Foata normal form. 11/2167 useless extension candidates. Maximal degree in co-relation 9376. Up to 1899 conditions per place. [2024-06-14 13:12:12,387 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-14 13:12:12,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 148 transitions, 1230 flow [2024-06-14 13:12:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:12:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:12:12,389 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 679 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:12:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 148 transitions, 1230 flow [2024-06-14 13:12:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 148 transitions, 1182 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 13:12:12,401 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 855 flow [2024-06-14 13:12:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-06-14 13:12:12,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 13:12:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 855 flow [2024-06-14 13:12:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:12:12,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -465830737, now seen corresponding path program 3 times [2024-06-14 13:12:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457214249] [2024-06-14 13:12:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457214249] [2024-06-14 13:12:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457214249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:14,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:14,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:14,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255741180] [2024-06-14 13:12:14,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:14,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:14,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:14,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:14,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:16,012 INFO L124 PetriNetUnfolderBase]: 1392/2178 cut-off events. [2024-06-14 13:12:16,012 INFO L125 PetriNetUnfolderBase]: For 14862/14864 co-relation queries the response was YES. [2024-06-14 13:12:16,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10387 conditions, 2178 events. 1392/2178 cut-off events. For 14862/14864 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10543 event pairs, 409 based on Foata normal form. 2/2175 useless extension candidates. Maximal degree in co-relation 10347. Up to 1830 conditions per place. [2024-06-14 13:12:16,025 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 41 changer transitions 0/157 dead transitions. [2024-06-14 13:12:16,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 157 transitions, 1498 flow [2024-06-14 13:12:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:12:16,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 13:12:16,027 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 855 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:12:16,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 157 transitions, 1498 flow [2024-06-14 13:12:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 157 transitions, 1415 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:16,042 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1148 flow [2024-06-14 13:12:16,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-06-14 13:12:16,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 13:12:16,043 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1148 flow [2024-06-14 13:12:16,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:16,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:16,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:16,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:12:16,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:16,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -465830551, now seen corresponding path program 1 times [2024-06-14 13:12:16,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:16,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975479429] [2024-06-14 13:12:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:18,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975479429] [2024-06-14 13:12:18,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975479429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:18,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:12:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921677266] [2024-06-14 13:12:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:12:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:12:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:12:18,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:18,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1148 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:18,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:18,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:18,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:19,190 INFO L124 PetriNetUnfolderBase]: 1405/2200 cut-off events. [2024-06-14 13:12:19,190 INFO L125 PetriNetUnfolderBase]: For 18260/18268 co-relation queries the response was YES. [2024-06-14 13:12:19,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11331 conditions, 2200 events. 1405/2200 cut-off events. For 18260/18268 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10671 event pairs, 407 based on Foata normal form. 10/2206 useless extension candidates. Maximal degree in co-relation 11287. Up to 1992 conditions per place. [2024-06-14 13:12:19,204 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 128 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2024-06-14 13:12:19,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1596 flow [2024-06-14 13:12:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:12:19,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:12:19,207 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1148 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:12:19,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1596 flow [2024-06-14 13:12:19,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1552 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:12:19,225 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1185 flow [2024-06-14 13:12:19,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1185, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-14 13:12:19,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 13:12:19,226 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1185 flow [2024-06-14 13:12:19,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:19,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:19,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:12:19,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:19,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1206315547, now seen corresponding path program 2 times [2024-06-14 13:12:19,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:19,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176152421] [2024-06-14 13:12:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:19,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:21,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:21,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176152421] [2024-06-14 13:12:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176152421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:21,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:12:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866589055] [2024-06-14 13:12:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:12:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:12:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:12:21,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:21,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:21,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:21,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:22,283 INFO L124 PetriNetUnfolderBase]: 1400/2199 cut-off events. [2024-06-14 13:12:22,283 INFO L125 PetriNetUnfolderBase]: For 20323/20364 co-relation queries the response was YES. [2024-06-14 13:12:22,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11494 conditions, 2199 events. 1400/2199 cut-off events. For 20323/20364 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10751 event pairs, 419 based on Foata normal form. 34/2227 useless extension candidates. Maximal degree in co-relation 11448. Up to 1987 conditions per place. [2024-06-14 13:12:22,297 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 124 selfloop transitions, 23 changer transitions 0/152 dead transitions. [2024-06-14 13:12:22,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 152 transitions, 1556 flow [2024-06-14 13:12:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:12:22,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 13:12:22,299 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1185 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:12:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 152 transitions, 1556 flow [2024-06-14 13:12:22,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 152 transitions, 1526 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:22,318 INFO L231 Difference]: Finished difference. Result has 100 places, 131 transitions, 1220 flow [2024-06-14 13:12:22,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1220, PETRI_PLACES=100, PETRI_TRANSITIONS=131} [2024-06-14 13:12:22,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 13:12:22,319 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 131 transitions, 1220 flow [2024-06-14 13:12:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:22,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:22,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:22,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:12:22,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:22,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1206552883, now seen corresponding path program 4 times [2024-06-14 13:12:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:22,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546075537] [2024-06-14 13:12:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:24,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546075537] [2024-06-14 13:12:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546075537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:24,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:24,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281345359] [2024-06-14 13:12:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:24,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:24,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:24,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 131 transitions, 1220 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:24,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:24,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:24,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:25,892 INFO L124 PetriNetUnfolderBase]: 1395/2172 cut-off events. [2024-06-14 13:12:25,893 INFO L125 PetriNetUnfolderBase]: For 22372/22380 co-relation queries the response was YES. [2024-06-14 13:12:25,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11607 conditions, 2172 events. 1395/2172 cut-off events. For 22372/22380 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10405 event pairs, 440 based on Foata normal form. 4/2161 useless extension candidates. Maximal degree in co-relation 11560. Up to 1832 conditions per place. [2024-06-14 13:12:25,907 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 48 changer transitions 0/160 dead transitions. [2024-06-14 13:12:25,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1692 flow [2024-06-14 13:12:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:12:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:12:25,909 INFO L175 Difference]: Start difference. First operand has 100 places, 131 transitions, 1220 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:12:25,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1692 flow [2024-06-14 13:12:25,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 1661 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:25,931 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1335 flow [2024-06-14 13:12:25,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-14 13:12:25,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 13:12:25,933 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1335 flow [2024-06-14 13:12:25,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:25,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:25,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:25,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:12:25,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:25,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:25,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1179494719, now seen corresponding path program 1 times [2024-06-14 13:12:25,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:25,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405929962] [2024-06-14 13:12:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:27,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405929962] [2024-06-14 13:12:27,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405929962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:27,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:27,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:12:27,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352635976] [2024-06-14 13:12:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:12:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:12:27,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:12:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:27,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1335 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:27,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:27,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:27,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,471 INFO L124 PetriNetUnfolderBase]: 1387/2175 cut-off events. [2024-06-14 13:12:28,471 INFO L125 PetriNetUnfolderBase]: For 25138/25146 co-relation queries the response was YES. [2024-06-14 13:12:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11940 conditions, 2175 events. 1387/2175 cut-off events. For 25138/25146 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10544 event pairs, 409 based on Foata normal form. 8/2181 useless extension candidates. Maximal degree in co-relation 11891. Up to 2028 conditions per place. [2024-06-14 13:12:28,483 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 139 selfloop transitions, 12 changer transitions 0/156 dead transitions. [2024-06-14 13:12:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 156 transitions, 1715 flow [2024-06-14 13:12:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:12:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:12:28,485 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1335 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:12:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 156 transitions, 1715 flow [2024-06-14 13:12:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1629 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:28,507 INFO L231 Difference]: Finished difference. Result has 106 places, 136 transitions, 1306 flow [2024-06-14 13:12:28,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1306, PETRI_PLACES=106, PETRI_TRANSITIONS=136} [2024-06-14 13:12:28,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:12:28,508 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 136 transitions, 1306 flow [2024-06-14 13:12:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:28,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:28,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:12:28,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:28,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1559567878, now seen corresponding path program 1 times [2024-06-14 13:12:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388323258] [2024-06-14 13:12:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:31,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388323258] [2024-06-14 13:12:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388323258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:31,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294974421] [2024-06-14 13:12:31,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:31,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:31,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 136 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:31,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:31,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:32,246 INFO L124 PetriNetUnfolderBase]: 1371/2153 cut-off events. [2024-06-14 13:12:32,247 INFO L125 PetriNetUnfolderBase]: For 26734/26742 co-relation queries the response was YES. [2024-06-14 13:12:32,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2153 events. 1371/2153 cut-off events. For 26734/26742 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10409 event pairs, 391 based on Foata normal form. 14/2166 useless extension candidates. Maximal degree in co-relation 11752. Up to 1895 conditions per place. [2024-06-14 13:12:32,259 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 115 selfloop transitions, 54 changer transitions 0/174 dead transitions. [2024-06-14 13:12:32,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 174 transitions, 1770 flow [2024-06-14 13:12:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:12:32,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:12:32,261 INFO L175 Difference]: Start difference. First operand has 106 places, 136 transitions, 1306 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:12:32,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 174 transitions, 1770 flow [2024-06-14 13:12:32,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 174 transitions, 1715 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:32,284 INFO L231 Difference]: Finished difference. Result has 110 places, 136 transitions, 1378 flow [2024-06-14 13:12:32,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=110, PETRI_TRANSITIONS=136} [2024-06-14 13:12:32,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 13:12:32,285 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 136 transitions, 1378 flow [2024-06-14 13:12:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:32,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:32,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:12:32,286 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1555843228, now seen corresponding path program 2 times [2024-06-14 13:12:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621739094] [2024-06-14 13:12:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621739094] [2024-06-14 13:12:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621739094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:34,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:34,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:34,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068851897] [2024-06-14 13:12:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:34,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:34,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:34,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:34,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 136 transitions, 1378 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:34,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:34,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:34,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:36,100 INFO L124 PetriNetUnfolderBase]: 1402/2207 cut-off events. [2024-06-14 13:12:36,100 INFO L125 PetriNetUnfolderBase]: For 30056/30058 co-relation queries the response was YES. [2024-06-14 13:12:36,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12385 conditions, 2207 events. 1402/2207 cut-off events. For 30056/30058 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10778 event pairs, 407 based on Foata normal form. 2/2205 useless extension candidates. Maximal degree in co-relation 12333. Up to 1835 conditions per place. [2024-06-14 13:12:36,114 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 49 changer transitions 0/173 dead transitions. [2024-06-14 13:12:36,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 173 transitions, 2002 flow [2024-06-14 13:12:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:12:36,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 13:12:36,123 INFO L175 Difference]: Start difference. First operand has 110 places, 136 transitions, 1378 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:12:36,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 173 transitions, 2002 flow [2024-06-14 13:12:36,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 173 transitions, 1894 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:36,149 INFO L231 Difference]: Finished difference. Result has 110 places, 142 transitions, 1456 flow [2024-06-14 13:12:36,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1456, PETRI_PLACES=110, PETRI_TRANSITIONS=142} [2024-06-14 13:12:36,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 13:12:36,150 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 142 transitions, 1456 flow [2024-06-14 13:12:36,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:36,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:36,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:36,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:12:36,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:36,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash -521399862, now seen corresponding path program 3 times [2024-06-14 13:12:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:36,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354193657] [2024-06-14 13:12:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354193657] [2024-06-14 13:12:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354193657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:39,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:39,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:39,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372012239] [2024-06-14 13:12:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:39,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:39,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 142 transitions, 1456 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:39,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:39,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:39,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:40,520 INFO L124 PetriNetUnfolderBase]: 1415/2229 cut-off events. [2024-06-14 13:12:40,520 INFO L125 PetriNetUnfolderBase]: For 32984/32986 co-relation queries the response was YES. [2024-06-14 13:12:40,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12728 conditions, 2229 events. 1415/2229 cut-off events. For 32984/32986 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10894 event pairs, 407 based on Foata normal form. 2/2226 useless extension candidates. Maximal degree in co-relation 12675. Up to 1849 conditions per place. [2024-06-14 13:12:40,535 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 119 selfloop transitions, 55 changer transitions 0/179 dead transitions. [2024-06-14 13:12:40,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 179 transitions, 2010 flow [2024-06-14 13:12:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:12:40,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:12:40,538 INFO L175 Difference]: Start difference. First operand has 110 places, 142 transitions, 1456 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:12:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 179 transitions, 2010 flow [2024-06-14 13:12:40,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 179 transitions, 1929 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:40,571 INFO L231 Difference]: Finished difference. Result has 115 places, 145 transitions, 1539 flow [2024-06-14 13:12:40,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1539, PETRI_PLACES=115, PETRI_TRANSITIONS=145} [2024-06-14 13:12:40,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 13:12:40,572 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 145 transitions, 1539 flow [2024-06-14 13:12:40,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:40,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:40,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:40,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:12:40,572 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:40,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1258925672, now seen corresponding path program 4 times [2024-06-14 13:12:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176900705] [2024-06-14 13:12:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176900705] [2024-06-14 13:12:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176900705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:12:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721712842] [2024-06-14 13:12:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:12:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:12:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:12:43,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:43,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 145 transitions, 1539 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:43,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:43,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:43,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:44,286 INFO L124 PetriNetUnfolderBase]: 1410/2226 cut-off events. [2024-06-14 13:12:44,286 INFO L125 PetriNetUnfolderBase]: For 37050/37087 co-relation queries the response was YES. [2024-06-14 13:12:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12832 conditions, 2226 events. 1410/2226 cut-off events. For 37050/37087 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10949 event pairs, 441 based on Foata normal form. 17/2231 useless extension candidates. Maximal degree in co-relation 12778. Up to 1844 conditions per place. [2024-06-14 13:12:44,300 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 52 changer transitions 0/172 dead transitions. [2024-06-14 13:12:44,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 172 transitions, 2030 flow [2024-06-14 13:12:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:12:44,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:12:44,302 INFO L175 Difference]: Start difference. First operand has 115 places, 145 transitions, 1539 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:12:44,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 172 transitions, 2030 flow [2024-06-14 13:12:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1896 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:44,336 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1532 flow [2024-06-14 13:12:44,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1532, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-14 13:12:44,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 13:12:44,337 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1532 flow [2024-06-14 13:12:44,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:44,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:44,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:44,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:12:44,338 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:44,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1251568442, now seen corresponding path program 5 times [2024-06-14 13:12:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435021142] [2024-06-14 13:12:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435021142] [2024-06-14 13:12:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435021142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:47,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:47,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:47,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387974396] [2024-06-14 13:12:47,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:47,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:47,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1532 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:47,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:47,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:48,661 INFO L124 PetriNetUnfolderBase]: 1405/2200 cut-off events. [2024-06-14 13:12:48,661 INFO L125 PetriNetUnfolderBase]: For 38693/38701 co-relation queries the response was YES. [2024-06-14 13:12:48,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12827 conditions, 2200 events. 1405/2200 cut-off events. For 38693/38701 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10611 event pairs, 446 based on Foata normal form. 4/2187 useless extension candidates. Maximal degree in co-relation 12772. Up to 1839 conditions per place. [2024-06-14 13:12:48,678 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 58 changer transitions 0/175 dead transitions. [2024-06-14 13:12:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1954 flow [2024-06-14 13:12:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:12:48,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:12:48,680 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1532 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:12:48,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1954 flow [2024-06-14 13:12:48,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 175 transitions, 1855 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:48,715 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1557 flow [2024-06-14 13:12:48,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1557, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-06-14 13:12:48,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:12:48,716 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1557 flow [2024-06-14 13:12:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:48,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:48,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:12:48,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1540378754, now seen corresponding path program 1 times [2024-06-14 13:12:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899602376] [2024-06-14 13:12:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899602376] [2024-06-14 13:12:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899602376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971279986] [2024-06-14 13:12:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:52,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:52,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1557 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:52,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:52,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:52,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:53,424 INFO L124 PetriNetUnfolderBase]: 1624/2574 cut-off events. [2024-06-14 13:12:53,424 INFO L125 PetriNetUnfolderBase]: For 50004/50012 co-relation queries the response was YES. [2024-06-14 13:12:53,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 2574 events. 1624/2574 cut-off events. For 50004/50012 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13168 event pairs, 298 based on Foata normal form. 14/2587 useless extension candidates. Maximal degree in co-relation 15159. Up to 1897 conditions per place. [2024-06-14 13:12:53,439 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 141 selfloop transitions, 57 changer transitions 0/203 dead transitions. [2024-06-14 13:12:53,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 2283 flow [2024-06-14 13:12:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 13:12:53,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 13:12:53,441 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 1557 flow. Second operand 9 states and 175 transitions. [2024-06-14 13:12:53,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 2283 flow [2024-06-14 13:12:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 203 transitions, 2151 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:53,479 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 1660 flow [2024-06-14 13:12:53,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1660, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2024-06-14 13:12:53,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:12:53,480 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 1660 flow [2024-06-14 13:12:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:53,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:53,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:53,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:12:53,480 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:53,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1101966740, now seen corresponding path program 2 times [2024-06-14 13:12:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389580296] [2024-06-14 13:12:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:56,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:56,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389580296] [2024-06-14 13:12:56,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389580296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:56,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690661805] [2024-06-14 13:12:56,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:56,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:56,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 1660 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:56,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:56,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:56,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:57,883 INFO L124 PetriNetUnfolderBase]: 1611/2555 cut-off events. [2024-06-14 13:12:57,883 INFO L125 PetriNetUnfolderBase]: For 53551/53559 co-relation queries the response was YES. [2024-06-14 13:12:57,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15473 conditions, 2555 events. 1611/2555 cut-off events. For 53551/53559 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13058 event pairs, 393 based on Foata normal form. 14/2568 useless extension candidates. Maximal degree in co-relation 15414. Up to 2239 conditions per place. [2024-06-14 13:12:57,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 137 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-14 13:12:57,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 2226 flow [2024-06-14 13:12:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:12:57,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:12:57,901 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 1660 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:12:57,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 2226 flow [2024-06-14 13:12:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 199 transitions, 2117 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:57,949 INFO L231 Difference]: Finished difference. Result has 128 places, 156 transitions, 1734 flow [2024-06-14 13:12:57,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1734, PETRI_PLACES=128, PETRI_TRANSITIONS=156} [2024-06-14 13:12:57,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:12:57,950 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 156 transitions, 1734 flow [2024-06-14 13:12:57,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:57,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:57,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:57,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:12:57,950 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:57,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash -986675570, now seen corresponding path program 3 times [2024-06-14 13:12:57,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:57,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53192324] [2024-06-14 13:12:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:57,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:00,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53192324] [2024-06-14 13:13:00,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53192324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:00,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:00,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164028190] [2024-06-14 13:13:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:00,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:01,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:01,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 156 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:01,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:01,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:01,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:02,423 INFO L124 PetriNetUnfolderBase]: 1631/2581 cut-off events. [2024-06-14 13:13:02,423 INFO L125 PetriNetUnfolderBase]: For 58730/58732 co-relation queries the response was YES. [2024-06-14 13:13:02,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15976 conditions, 2581 events. 1631/2581 cut-off events. For 58730/58732 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13153 event pairs, 409 based on Foata normal form. 4/2580 useless extension candidates. Maximal degree in co-relation 15915. Up to 2179 conditions per place. [2024-06-14 13:13:02,443 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 58 changer transitions 0/191 dead transitions. [2024-06-14 13:13:02,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2238 flow [2024-06-14 13:13:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:13:02,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:13:02,445 INFO L175 Difference]: Start difference. First operand has 128 places, 156 transitions, 1734 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:13:02,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2238 flow [2024-06-14 13:13:02,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 191 transitions, 2095 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:02,504 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1758 flow [2024-06-14 13:13:02,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1758, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-14 13:13:02,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 13:13:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1758 flow [2024-06-14 13:13:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:02,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:02,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:13:02,505 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:02,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -986490872, now seen corresponding path program 1 times [2024-06-14 13:13:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463242152] [2024-06-14 13:13:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:05,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:05,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463242152] [2024-06-14 13:13:05,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463242152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:05,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:05,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173010226] [2024-06-14 13:13:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:05,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:05,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:05,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:05,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1758 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:05,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:05,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:05,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:06,312 INFO L124 PetriNetUnfolderBase]: 1651/2618 cut-off events. [2024-06-14 13:13:06,312 INFO L125 PetriNetUnfolderBase]: For 63470/63478 co-relation queries the response was YES. [2024-06-14 13:13:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 2618 events. 1651/2618 cut-off events. For 63470/63478 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13485 event pairs, 398 based on Foata normal form. 12/2626 useless extension candidates. Maximal degree in co-relation 16287. Up to 2368 conditions per place. [2024-06-14 13:13:06,332 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 159 selfloop transitions, 26 changer transitions 0/190 dead transitions. [2024-06-14 13:13:06,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2248 flow [2024-06-14 13:13:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:13:06,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:13:06,333 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1758 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:13:06,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2248 flow [2024-06-14 13:13:06,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 190 transitions, 2099 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:06,395 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1702 flow [2024-06-14 13:13:06,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1702, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2024-06-14 13:13:06,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:13:06,395 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1702 flow [2024-06-14 13:13:06,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:06,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:06,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:06,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:13:06,396 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:06,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 143913260, now seen corresponding path program 4 times [2024-06-14 13:13:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454516431] [2024-06-14 13:13:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454516431] [2024-06-14 13:13:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454516431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127993557] [2024-06-14 13:13:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:09,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:09,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1702 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:09,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:09,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:09,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:10,496 INFO L124 PetriNetUnfolderBase]: 1643/2582 cut-off events. [2024-06-14 13:13:10,496 INFO L125 PetriNetUnfolderBase]: For 66569/66577 co-relation queries the response was YES. [2024-06-14 13:13:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16178 conditions, 2582 events. 1643/2582 cut-off events. For 66569/66577 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13056 event pairs, 449 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 16115. Up to 2199 conditions per place. [2024-06-14 13:13:10,514 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 60 changer transitions 0/192 dead transitions. [2024-06-14 13:13:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 192 transitions, 2206 flow [2024-06-14 13:13:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:13:10,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:13:10,516 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1702 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:13:10,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 192 transitions, 2206 flow [2024-06-14 13:13:10,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 192 transitions, 2131 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:10,574 INFO L231 Difference]: Finished difference. Result has 133 places, 162 transitions, 1804 flow [2024-06-14 13:13:10,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1804, PETRI_PLACES=133, PETRI_TRANSITIONS=162} [2024-06-14 13:13:10,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 13:13:10,575 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 162 transitions, 1804 flow [2024-06-14 13:13:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:10,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:10,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:13:10,576 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:10,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 368431232, now seen corresponding path program 2 times [2024-06-14 13:13:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260021403] [2024-06-14 13:13:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260021403] [2024-06-14 13:13:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260021403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:13,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443533949] [2024-06-14 13:13:13,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:13,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:13,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 162 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:13,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:14,240 INFO L124 PetriNetUnfolderBase]: 1663/2644 cut-off events. [2024-06-14 13:13:14,241 INFO L125 PetriNetUnfolderBase]: For 72631/72672 co-relation queries the response was YES. [2024-06-14 13:13:14,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16762 conditions, 2644 events. 1663/2644 cut-off events. For 72631/72672 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13672 event pairs, 416 based on Foata normal form. 36/2674 useless extension candidates. Maximal degree in co-relation 16698. Up to 2388 conditions per place. [2024-06-14 13:13:14,258 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 161 selfloop transitions, 25 changer transitions 0/191 dead transitions. [2024-06-14 13:13:14,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2294 flow [2024-06-14 13:13:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:13:14,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:13:14,259 INFO L175 Difference]: Start difference. First operand has 133 places, 162 transitions, 1804 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:13:14,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2294 flow [2024-06-14 13:13:14,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 2135 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:14,327 INFO L231 Difference]: Finished difference. Result has 134 places, 164 transitions, 1742 flow [2024-06-14 13:13:14,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1742, PETRI_PLACES=134, PETRI_TRANSITIONS=164} [2024-06-14 13:13:14,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:13:14,328 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 164 transitions, 1742 flow [2024-06-14 13:13:14,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:14,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:14,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:14,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:13:14,329 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:14,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash -620615574, now seen corresponding path program 3 times [2024-06-14 13:13:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:14,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021634613] [2024-06-14 13:13:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:14,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:16,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021634613] [2024-06-14 13:13:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021634613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:16,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452425300] [2024-06-14 13:13:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:16,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:16,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:16,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:16,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 164 transitions, 1742 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:16,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:16,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:17,711 INFO L124 PetriNetUnfolderBase]: 1655/2636 cut-off events. [2024-06-14 13:13:17,712 INFO L125 PetriNetUnfolderBase]: For 74620/74661 co-relation queries the response was YES. [2024-06-14 13:13:17,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16579 conditions, 2636 events. 1655/2636 cut-off events. For 74620/74661 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13729 event pairs, 378 based on Foata normal form. 36/2666 useless extension candidates. Maximal degree in co-relation 16514. Up to 2304 conditions per place. [2024-06-14 13:13:17,731 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 159 selfloop transitions, 30 changer transitions 0/194 dead transitions. [2024-06-14 13:13:17,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 194 transitions, 2244 flow [2024-06-14 13:13:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:13:17,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:13:17,734 INFO L175 Difference]: Start difference. First operand has 134 places, 164 transitions, 1742 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:13:17,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 194 transitions, 2244 flow [2024-06-14 13:13:17,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 2165 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:17,813 INFO L231 Difference]: Finished difference. Result has 136 places, 166 transitions, 1774 flow [2024-06-14 13:13:17,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1774, PETRI_PLACES=136, PETRI_TRANSITIONS=166} [2024-06-14 13:13:17,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 13:13:17,813 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 166 transitions, 1774 flow [2024-06-14 13:13:17,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:17,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:17,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:13:17,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:17,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash -89262242, now seen corresponding path program 1 times [2024-06-14 13:13:17,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:17,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863781816] [2024-06-14 13:13:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:17,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863781816] [2024-06-14 13:13:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863781816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:19,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395460422] [2024-06-14 13:13:19,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:19,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:13:19,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 166 transitions, 1774 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:19,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:13:19,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:20,346 INFO L124 PetriNetUnfolderBase]: 1541/2501 cut-off events. [2024-06-14 13:13:20,347 INFO L125 PetriNetUnfolderBase]: For 76297/76313 co-relation queries the response was YES. [2024-06-14 13:13:20,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15995 conditions, 2501 events. 1541/2501 cut-off events. For 76297/76313 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13287 event pairs, 402 based on Foata normal form. 16/2514 useless extension candidates. Maximal degree in co-relation 15929. Up to 2274 conditions per place. [2024-06-14 13:13:20,365 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 152 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2024-06-14 13:13:20,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 2150 flow [2024-06-14 13:13:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:13:20,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:13:20,366 INFO L175 Difference]: Start difference. First operand has 136 places, 166 transitions, 1774 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:13:20,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 2150 flow [2024-06-14 13:13:20,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2057 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:20,433 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1735 flow [2024-06-14 13:13:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1735, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2024-06-14 13:13:20,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 13:13:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1735 flow [2024-06-14 13:13:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:13:20,434 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:20,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -884679063, now seen corresponding path program 1 times [2024-06-14 13:13:20,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:20,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370957926] [2024-06-14 13:13:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:20,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370957926] [2024-06-14 13:13:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370957926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:23,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847048612] [2024-06-14 13:13:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:23,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:23,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1735 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:23,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:23,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:23,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:24,693 INFO L124 PetriNetUnfolderBase]: 1717/2737 cut-off events. [2024-06-14 13:13:24,693 INFO L125 PetriNetUnfolderBase]: For 87712/87720 co-relation queries the response was YES. [2024-06-14 13:13:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17377 conditions, 2737 events. 1717/2737 cut-off events. For 87712/87720 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14217 event pairs, 289 based on Foata normal form. 26/2762 useless extension candidates. Maximal degree in co-relation 17310. Up to 1981 conditions per place. [2024-06-14 13:13:24,713 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 156 selfloop transitions, 61 changer transitions 0/222 dead transitions. [2024-06-14 13:13:24,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 222 transitions, 2481 flow [2024-06-14 13:13:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:13:24,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 13:13:24,714 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1735 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:13:24,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 222 transitions, 2481 flow [2024-06-14 13:13:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 222 transitions, 2449 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:24,783 INFO L231 Difference]: Finished difference. Result has 142 places, 171 transitions, 1867 flow [2024-06-14 13:13:24,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1867, PETRI_PLACES=142, PETRI_TRANSITIONS=171} [2024-06-14 13:13:24,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 13:13:24,784 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 171 transitions, 1867 flow [2024-06-14 13:13:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:24,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:24,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:24,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:13:24,784 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:24,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash -795965433, now seen corresponding path program 2 times [2024-06-14 13:13:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:24,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526518320] [2024-06-14 13:13:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:27,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526518320] [2024-06-14 13:13:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526518320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:27,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:27,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:27,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172582933] [2024-06-14 13:13:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:27,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:27,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:27,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 171 transitions, 1867 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:27,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:29,166 INFO L124 PetriNetUnfolderBase]: 1671/2667 cut-off events. [2024-06-14 13:13:29,166 INFO L125 PetriNetUnfolderBase]: For 85753/85761 co-relation queries the response was YES. [2024-06-14 13:13:29,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16810 conditions, 2667 events. 1671/2667 cut-off events. For 85753/85761 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13783 event pairs, 373 based on Foata normal form. 32/2698 useless extension candidates. Maximal degree in co-relation 16742. Up to 2225 conditions per place. [2024-06-14 13:13:29,186 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 56 changer transitions 0/218 dead transitions. [2024-06-14 13:13:29,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 218 transitions, 2464 flow [2024-06-14 13:13:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:13:29,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 13:13:29,187 INFO L175 Difference]: Start difference. First operand has 142 places, 171 transitions, 1867 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:13:29,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 218 transitions, 2464 flow [2024-06-14 13:13:29,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 2338 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:29,307 INFO L231 Difference]: Finished difference. Result has 145 places, 172 transitions, 1890 flow [2024-06-14 13:13:29,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1890, PETRI_PLACES=145, PETRI_TRANSITIONS=172} [2024-06-14 13:13:29,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 13:13:29,308 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 172 transitions, 1890 flow [2024-06-14 13:13:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:29,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:29,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:13:29,308 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:29,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash -522021577, now seen corresponding path program 3 times [2024-06-14 13:13:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622652953] [2024-06-14 13:13:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:32,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:32,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622652953] [2024-06-14 13:13:32,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622652953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:32,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:32,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507373896] [2024-06-14 13:13:32,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:32,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:32,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 172 transitions, 1890 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:32,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:32,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:32,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:34,664 INFO L124 PetriNetUnfolderBase]: 1739/2789 cut-off events. [2024-06-14 13:13:34,664 INFO L125 PetriNetUnfolderBase]: For 88886/88888 co-relation queries the response was YES. [2024-06-14 13:13:34,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17437 conditions, 2789 events. 1739/2789 cut-off events. For 88886/88888 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14738 event pairs, 407 based on Foata normal form. 16/2800 useless extension candidates. Maximal degree in co-relation 17368. Up to 2283 conditions per place. [2024-06-14 13:13:34,685 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 57 changer transitions 0/214 dead transitions. [2024-06-14 13:13:34,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 214 transitions, 2468 flow [2024-06-14 13:13:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:13:34,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:13:34,686 INFO L175 Difference]: Start difference. First operand has 145 places, 172 transitions, 1890 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:13:34,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 214 transitions, 2468 flow [2024-06-14 13:13:34,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 214 transitions, 2360 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:34,774 INFO L231 Difference]: Finished difference. Result has 147 places, 173 transitions, 1935 flow [2024-06-14 13:13:34,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1935, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2024-06-14 13:13:34,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 13:13:34,775 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1935 flow [2024-06-14 13:13:34,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:34,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:34,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:13:34,775 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:34,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash -522169447, now seen corresponding path program 4 times [2024-06-14 13:13:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052836286] [2024-06-14 13:13:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052836286] [2024-06-14 13:13:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052836286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:38,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465308739] [2024-06-14 13:13:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:38,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:38,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:38,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1935 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:38,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:38,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:38,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:39,832 INFO L124 PetriNetUnfolderBase]: 1787/2873 cut-off events. [2024-06-14 13:13:39,832 INFO L125 PetriNetUnfolderBase]: For 93715/93717 co-relation queries the response was YES. [2024-06-14 13:13:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18076 conditions, 2873 events. 1787/2873 cut-off events. For 93715/93717 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15300 event pairs, 403 based on Foata normal form. 12/2880 useless extension candidates. Maximal degree in co-relation 18006. Up to 2261 conditions per place. [2024-06-14 13:13:39,851 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 60 changer transitions 0/223 dead transitions. [2024-06-14 13:13:39,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 223 transitions, 2563 flow [2024-06-14 13:13:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:13:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:13:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:13:39,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 13:13:39,852 INFO L175 Difference]: Start difference. First operand has 147 places, 173 transitions, 1935 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:13:39,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 223 transitions, 2563 flow [2024-06-14 13:13:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 2430 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:39,924 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1962 flow [2024-06-14 13:13:39,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1962, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-14 13:13:39,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 13:13:39,924 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1962 flow [2024-06-14 13:13:39,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:39,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:39,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:39,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:13:39,925 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:39,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1451332533, now seen corresponding path program 5 times [2024-06-14 13:13:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:39,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025158002] [2024-06-14 13:13:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:42,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025158002] [2024-06-14 13:13:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025158002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232327297] [2024-06-14 13:13:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:42,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:42,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1962 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:42,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:42,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:42,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:44,306 INFO L124 PetriNetUnfolderBase]: 1855/3004 cut-off events. [2024-06-14 13:13:44,306 INFO L125 PetriNetUnfolderBase]: For 101623/101625 co-relation queries the response was YES. [2024-06-14 13:13:44,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18756 conditions, 3004 events. 1855/3004 cut-off events. For 101623/101625 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16435 event pairs, 439 based on Foata normal form. 16/3016 useless extension candidates. Maximal degree in co-relation 18685. Up to 2483 conditions per place. [2024-06-14 13:13:44,328 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 152 selfloop transitions, 54 changer transitions 0/211 dead transitions. [2024-06-14 13:13:44,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 211 transitions, 2524 flow [2024-06-14 13:13:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:13:44,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:13:44,330 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1962 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:13:44,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 211 transitions, 2524 flow [2024-06-14 13:13:44,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 211 transitions, 2380 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:44,412 INFO L231 Difference]: Finished difference. Result has 150 places, 175 transitions, 1969 flow [2024-06-14 13:13:44,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=150, PETRI_TRANSITIONS=175} [2024-06-14 13:13:44,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 13:13:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 175 transitions, 1969 flow [2024-06-14 13:13:44,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:44,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:13:44,413 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:44,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash -516443995, now seen corresponding path program 1 times [2024-06-14 13:13:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:44,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314883365] [2024-06-14 13:13:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:47,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314883365] [2024-06-14 13:13:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314883365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:47,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560221179] [2024-06-14 13:13:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:47,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:47,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 175 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:47,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:47,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:47,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:48,601 INFO L124 PetriNetUnfolderBase]: 1999/3260 cut-off events. [2024-06-14 13:13:48,602 INFO L125 PetriNetUnfolderBase]: For 116815/116817 co-relation queries the response was YES. [2024-06-14 13:13:48,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20609 conditions, 3260 events. 1999/3260 cut-off events. For 116815/116817 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18416 event pairs, 463 based on Foata normal form. 12/3268 useless extension candidates. Maximal degree in co-relation 20537. Up to 2237 conditions per place. [2024-06-14 13:13:48,625 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 59 changer transitions 0/218 dead transitions. [2024-06-14 13:13:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 2729 flow [2024-06-14 13:13:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:13:48,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:13:48,627 INFO L175 Difference]: Start difference. First operand has 150 places, 175 transitions, 1969 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:13:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 2729 flow [2024-06-14 13:13:48,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 218 transitions, 2598 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:48,722 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 2036 flow [2024-06-14 13:13:48,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-14 13:13:48,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 13:13:48,723 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 2036 flow [2024-06-14 13:13:48,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:48,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:48,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:13:48,723 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:48,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1353142777, now seen corresponding path program 6 times [2024-06-14 13:13:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464613264] [2024-06-14 13:13:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:51,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:51,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464613264] [2024-06-14 13:13:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464613264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:51,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:51,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871208001] [2024-06-14 13:13:51,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:51,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 2036 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:51,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:53,128 INFO L124 PetriNetUnfolderBase]: 2067/3389 cut-off events. [2024-06-14 13:13:53,128 INFO L125 PetriNetUnfolderBase]: For 127213/127246 co-relation queries the response was YES. [2024-06-14 13:13:53,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21353 conditions, 3389 events. 2067/3389 cut-off events. For 127213/127246 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19489 event pairs, 537 based on Foata normal form. 29/3406 useless extension candidates. Maximal degree in co-relation 21280. Up to 2843 conditions per place. [2024-06-14 13:13:53,153 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 153 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-14 13:13:53,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 2594 flow [2024-06-14 13:13:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:13:53,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:13:53,155 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 2036 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:13:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 2594 flow [2024-06-14 13:13:53,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2496 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:53,281 INFO L231 Difference]: Finished difference. Result has 156 places, 178 transitions, 2091 flow [2024-06-14 13:13:53,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2091, PETRI_PLACES=156, PETRI_TRANSITIONS=178} [2024-06-14 13:13:53,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 13:13:53,282 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 178 transitions, 2091 flow [2024-06-14 13:13:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:53,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:53,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:53,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:13:53,282 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:53,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash 166493785, now seen corresponding path program 7 times [2024-06-14 13:13:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828308799] [2024-06-14 13:13:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:56,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828308799] [2024-06-14 13:13:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828308799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:56,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169049450] [2024-06-14 13:13:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:56,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:56,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 178 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:56,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:56,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:56,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:58,245 INFO L124 PetriNetUnfolderBase]: 2039/3326 cut-off events. [2024-06-14 13:13:58,245 INFO L125 PetriNetUnfolderBase]: For 121491/121499 co-relation queries the response was YES. [2024-06-14 13:13:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20696 conditions, 3326 events. 2039/3326 cut-off events. For 121491/121499 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18922 event pairs, 526 based on Foata normal form. 18/3327 useless extension candidates. Maximal degree in co-relation 20621. Up to 2799 conditions per place. [2024-06-14 13:13:58,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 59 changer transitions 0/216 dead transitions. [2024-06-14 13:13:58,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 216 transitions, 2635 flow [2024-06-14 13:13:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:13:58,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:13:58,268 INFO L175 Difference]: Start difference. First operand has 156 places, 178 transitions, 2091 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:13:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 216 transitions, 2635 flow [2024-06-14 13:13:58,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 216 transitions, 2486 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:58,391 INFO L231 Difference]: Finished difference. Result has 159 places, 178 transitions, 2067 flow [2024-06-14 13:13:58,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2067, PETRI_PLACES=159, PETRI_TRANSITIONS=178} [2024-06-14 13:13:58,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 13:13:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 178 transitions, 2067 flow [2024-06-14 13:13:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:58,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:58,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:58,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:13:58,392 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:58,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 44809953, now seen corresponding path program 8 times [2024-06-14 13:13:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17125747] [2024-06-14 13:13:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:58,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:01,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:01,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17125747] [2024-06-14 13:14:01,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17125747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:01,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:01,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911542167] [2024-06-14 13:14:01,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:01,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:01,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:01,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 178 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:01,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:01,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:01,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:03,431 INFO L124 PetriNetUnfolderBase]: 2059/3366 cut-off events. [2024-06-14 13:14:03,432 INFO L125 PetriNetUnfolderBase]: For 119360/119368 co-relation queries the response was YES. [2024-06-14 13:14:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20583 conditions, 3366 events. 2059/3366 cut-off events. For 119360/119368 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19228 event pairs, 518 based on Foata normal form. 14/3363 useless extension candidates. Maximal degree in co-relation 20507. Up to 2733 conditions per place. [2024-06-14 13:14:03,457 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 62 changer transitions 0/225 dead transitions. [2024-06-14 13:14:03,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 225 transitions, 2699 flow [2024-06-14 13:14:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 13:14:03,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-14 13:14:03,459 INFO L175 Difference]: Start difference. First operand has 159 places, 178 transitions, 2067 flow. Second operand 10 states and 179 transitions. [2024-06-14 13:14:03,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 225 transitions, 2699 flow [2024-06-14 13:14:03,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 225 transitions, 2576 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:03,583 INFO L231 Difference]: Finished difference. Result has 162 places, 179 transitions, 2116 flow [2024-06-14 13:14:03,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2116, PETRI_PLACES=162, PETRI_TRANSITIONS=179} [2024-06-14 13:14:03,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 13:14:03,584 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 179 transitions, 2116 flow [2024-06-14 13:14:03,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:03,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:03,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:14:03,584 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:03,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1463531731, now seen corresponding path program 2 times [2024-06-14 13:14:03,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:03,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608472574] [2024-06-14 13:14:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:06,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:06,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608472574] [2024-06-14 13:14:06,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608472574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:06,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:06,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:06,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81437582] [2024-06-14 13:14:06,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:06,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:06,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:06,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:06,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:06,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 179 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:06,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:06,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:07,675 INFO L124 PetriNetUnfolderBase]: 2107/3481 cut-off events. [2024-06-14 13:14:07,675 INFO L125 PetriNetUnfolderBase]: For 127822/127855 co-relation queries the response was YES. [2024-06-14 13:14:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21235 conditions, 3481 events. 2107/3481 cut-off events. For 127822/127855 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20365 event pairs, 531 based on Foata normal form. 25/3494 useless extension candidates. Maximal degree in co-relation 21158. Up to 2817 conditions per place. [2024-06-14 13:14:07,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 156 selfloop transitions, 55 changer transitions 0/216 dead transitions. [2024-06-14 13:14:07,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 216 transitions, 2702 flow [2024-06-14 13:14:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:14:07,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:14:07,704 INFO L175 Difference]: Start difference. First operand has 162 places, 179 transitions, 2116 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:14:07,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 216 transitions, 2702 flow [2024-06-14 13:14:07,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 216 transitions, 2546 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:07,823 INFO L231 Difference]: Finished difference. Result has 162 places, 180 transitions, 2120 flow [2024-06-14 13:14:07,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2120, PETRI_PLACES=162, PETRI_TRANSITIONS=180} [2024-06-14 13:14:07,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 13:14:07,823 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 180 transitions, 2120 flow [2024-06-14 13:14:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:07,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:07,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:07,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:14:07,824 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:07,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1087230295, now seen corresponding path program 3 times [2024-06-14 13:14:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188363301] [2024-06-14 13:14:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188363301] [2024-06-14 13:14:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188363301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:10,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888150723] [2024-06-14 13:14:10,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:10,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:10,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:10,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 180 transitions, 2120 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:10,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:10,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:10,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:11,957 INFO L124 PetriNetUnfolderBase]: 2087/3449 cut-off events. [2024-06-14 13:14:11,957 INFO L125 PetriNetUnfolderBase]: For 123162/123195 co-relation queries the response was YES. [2024-06-14 13:14:11,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20522 conditions, 3449 events. 2087/3449 cut-off events. For 123162/123195 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20029 event pairs, 466 based on Foata normal form. 25/3462 useless extension candidates. Maximal degree in co-relation 20444. Up to 2085 conditions per place. [2024-06-14 13:14:11,983 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 64 changer transitions 0/216 dead transitions. [2024-06-14 13:14:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 216 transitions, 2592 flow [2024-06-14 13:14:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:14:11,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:14:11,985 INFO L175 Difference]: Start difference. First operand has 162 places, 180 transitions, 2120 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:14:11,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 216 transitions, 2592 flow [2024-06-14 13:14:12,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 2446 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:12,111 INFO L231 Difference]: Finished difference. Result has 163 places, 179 transitions, 2032 flow [2024-06-14 13:14:12,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2032, PETRI_PLACES=163, PETRI_TRANSITIONS=179} [2024-06-14 13:14:12,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 13:14:12,111 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 179 transitions, 2032 flow [2024-06-14 13:14:12,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:12,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:12,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:14:12,111 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:12,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash 476200566, now seen corresponding path program 1 times [2024-06-14 13:14:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:12,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266358037] [2024-06-14 13:14:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:13,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266358037] [2024-06-14 13:14:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266358037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:13,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594934288] [2024-06-14 13:14:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:13,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:13,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 179 transitions, 2032 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:13,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:13,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:13,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:14,885 INFO L124 PetriNetUnfolderBase]: 2092/3451 cut-off events. [2024-06-14 13:14:14,885 INFO L125 PetriNetUnfolderBase]: For 117669/117671 co-relation queries the response was YES. [2024-06-14 13:14:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20602 conditions, 3451 events. 2092/3451 cut-off events. For 117669/117671 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20149 event pairs, 515 based on Foata normal form. 1/3449 useless extension candidates. Maximal degree in co-relation 20523. Up to 3230 conditions per place. [2024-06-14 13:14:14,913 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 179 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-14 13:14:14,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 2760 flow [2024-06-14 13:14:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:14:14,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:14:14,914 INFO L175 Difference]: Start difference. First operand has 163 places, 179 transitions, 2032 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:14:14,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 2760 flow [2024-06-14 13:14:15,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 205 transitions, 2557 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:15,065 INFO L231 Difference]: Finished difference. Result has 163 places, 188 transitions, 2025 flow [2024-06-14 13:14:15,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2025, PETRI_PLACES=163, PETRI_TRANSITIONS=188} [2024-06-14 13:14:15,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 13:14:15,065 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 188 transitions, 2025 flow [2024-06-14 13:14:15,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:15,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:15,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:15,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:14:15,066 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:15,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1936860170, now seen corresponding path program 2 times [2024-06-14 13:14:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:15,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322477900] [2024-06-14 13:14:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322477900] [2024-06-14 13:14:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322477900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:16,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451039968] [2024-06-14 13:14:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:16,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:16,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:16,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 188 transitions, 2025 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:16,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:16,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:16,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:17,697 INFO L124 PetriNetUnfolderBase]: 2097/3464 cut-off events. [2024-06-14 13:14:17,698 INFO L125 PetriNetUnfolderBase]: For 120266/120268 co-relation queries the response was YES. [2024-06-14 13:14:17,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20463 conditions, 3464 events. 2097/3464 cut-off events. For 120266/120268 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20244 event pairs, 510 based on Foata normal form. 1/3464 useless extension candidates. Maximal degree in co-relation 20383. Up to 3246 conditions per place. [2024-06-14 13:14:17,725 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 187 selfloop transitions, 19 changer transitions 0/211 dead transitions. [2024-06-14 13:14:17,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 211 transitions, 2616 flow [2024-06-14 13:14:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:14:17,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:14:17,726 INFO L175 Difference]: Start difference. First operand has 163 places, 188 transitions, 2025 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:14:17,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 211 transitions, 2616 flow [2024-06-14 13:14:17,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 2518 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-14 13:14:17,857 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2032 flow [2024-06-14 13:14:17,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2032, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-14 13:14:17,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 13:14:17,857 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2032 flow [2024-06-14 13:14:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:17,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:17,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:14:17,858 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:17,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -236295105, now seen corresponding path program 1 times [2024-06-14 13:14:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921103863] [2024-06-14 13:14:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:20,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921103863] [2024-06-14 13:14:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921103863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:20,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644050682] [2024-06-14 13:14:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:20,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:20,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:20,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2032 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:20,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:20,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:22,034 INFO L124 PetriNetUnfolderBase]: 1964/3302 cut-off events. [2024-06-14 13:14:22,034 INFO L125 PetriNetUnfolderBase]: For 126009/126025 co-relation queries the response was YES. [2024-06-14 13:14:22,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19466 conditions, 3302 events. 1964/3302 cut-off events. For 126009/126025 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19724 event pairs, 453 based on Foata normal form. 22/3305 useless extension candidates. Maximal degree in co-relation 19382. Up to 2925 conditions per place. [2024-06-14 13:14:22,060 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 47 changer transitions 0/222 dead transitions. [2024-06-14 13:14:22,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 222 transitions, 2659 flow [2024-06-14 13:14:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:14:22,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:14:22,062 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2032 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:14:22,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 222 transitions, 2659 flow [2024-06-14 13:14:22,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 222 transitions, 2617 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:22,194 INFO L231 Difference]: Finished difference. Result has 173 places, 199 transitions, 2177 flow [2024-06-14 13:14:22,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2177, PETRI_PLACES=173, PETRI_TRANSITIONS=199} [2024-06-14 13:14:22,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 13:14:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 199 transitions, 2177 flow [2024-06-14 13:14:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:22,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:22,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:14:22,195 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:22,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash 87110139, now seen corresponding path program 2 times [2024-06-14 13:14:22,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:22,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468786650] [2024-06-14 13:14:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:24,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:24,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468786650] [2024-06-14 13:14:24,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468786650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:24,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:24,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:24,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911412452] [2024-06-14 13:14:24,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:24,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:24,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:24,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 199 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:24,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:24,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:25,813 INFO L124 PetriNetUnfolderBase]: 1950/3272 cut-off events. [2024-06-14 13:14:25,813 INFO L125 PetriNetUnfolderBase]: For 125120/125134 co-relation queries the response was YES. [2024-06-14 13:14:25,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 3272 events. 1950/3272 cut-off events. For 125120/125134 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19543 event pairs, 457 based on Foata normal form. 17/3260 useless extension candidates. Maximal degree in co-relation 19347. Up to 2897 conditions per place. [2024-06-14 13:14:25,838 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 149 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2024-06-14 13:14:25,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 216 transitions, 2721 flow [2024-06-14 13:14:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:14:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:14:25,840 INFO L175 Difference]: Start difference. First operand has 173 places, 199 transitions, 2177 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:14:25,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 216 transitions, 2721 flow [2024-06-14 13:14:25,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 216 transitions, 2649 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:25,978 INFO L231 Difference]: Finished difference. Result has 175 places, 202 transitions, 2245 flow [2024-06-14 13:14:25,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2245, PETRI_PLACES=175, PETRI_TRANSITIONS=202} [2024-06-14 13:14:25,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-14 13:14:25,979 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 202 transitions, 2245 flow [2024-06-14 13:14:25,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:25,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:25,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:25,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:14:25,979 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:25,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 86694429, now seen corresponding path program 3 times [2024-06-14 13:14:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:25,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505640409] [2024-06-14 13:14:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:28,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505640409] [2024-06-14 13:14:28,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505640409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:28,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:28,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:28,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745056907] [2024-06-14 13:14:28,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:28,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:28,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:28,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:28,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 202 transitions, 2245 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:28,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:28,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:28,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:29,539 INFO L124 PetriNetUnfolderBase]: 1939/3269 cut-off events. [2024-06-14 13:14:29,540 INFO L125 PetriNetUnfolderBase]: For 122058/122069 co-relation queries the response was YES. [2024-06-14 13:14:29,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19512 conditions, 3269 events. 1939/3269 cut-off events. For 122058/122069 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19593 event pairs, 450 based on Foata normal form. 13/3263 useless extension candidates. Maximal degree in co-relation 19427. Up to 2903 conditions per place. [2024-06-14 13:14:29,566 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 158 selfloop transitions, 45 changer transitions 0/221 dead transitions. [2024-06-14 13:14:29,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 221 transitions, 2703 flow [2024-06-14 13:14:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:14:29,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:14:29,568 INFO L175 Difference]: Start difference. First operand has 175 places, 202 transitions, 2245 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:14:29,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 221 transitions, 2703 flow [2024-06-14 13:14:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 221 transitions, 2579 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:29,692 INFO L231 Difference]: Finished difference. Result has 177 places, 202 transitions, 2232 flow [2024-06-14 13:14:29,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2232, PETRI_PLACES=177, PETRI_TRANSITIONS=202} [2024-06-14 13:14:29,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 13:14:29,692 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 202 transitions, 2232 flow [2024-06-14 13:14:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:29,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:29,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:14:29,693 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:29,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash -59099229, now seen corresponding path program 1 times [2024-06-14 13:14:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148357396] [2024-06-14 13:14:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148357396] [2024-06-14 13:14:31,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148357396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:31,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:31,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:31,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977343970] [2024-06-14 13:14:31,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:31,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:31,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:31,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 202 transitions, 2232 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:31,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:31,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:31,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:32,535 INFO L124 PetriNetUnfolderBase]: 2088/3456 cut-off events. [2024-06-14 13:14:32,535 INFO L125 PetriNetUnfolderBase]: For 125645/125653 co-relation queries the response was YES. [2024-06-14 13:14:32,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20508 conditions, 3456 events. 2088/3456 cut-off events. For 125645/125653 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20268 event pairs, 504 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 20422. Up to 3225 conditions per place. [2024-06-14 13:14:32,560 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 191 selfloop transitions, 25 changer transitions 0/221 dead transitions. [2024-06-14 13:14:32,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 221 transitions, 2835 flow [2024-06-14 13:14:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:14:32,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:14:32,561 INFO L175 Difference]: Start difference. First operand has 177 places, 202 transitions, 2232 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:14:32,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 221 transitions, 2835 flow [2024-06-14 13:14:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 221 transitions, 2727 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:32,699 INFO L231 Difference]: Finished difference. Result has 177 places, 205 transitions, 2223 flow [2024-06-14 13:14:32,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2223, PETRI_PLACES=177, PETRI_TRANSITIONS=205} [2024-06-14 13:14:32,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 13:14:32,700 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 205 transitions, 2223 flow [2024-06-14 13:14:32,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:32,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:32,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:32,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:14:32,700 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:32,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1904100795, now seen corresponding path program 1 times [2024-06-14 13:14:32,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:32,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871385976] [2024-06-14 13:14:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:32,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:34,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:34,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871385976] [2024-06-14 13:14:34,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871385976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:34,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:34,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78866735] [2024-06-14 13:14:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:34,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:34,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:34,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:34,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 205 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:34,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:34,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:34,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:36,152 INFO L124 PetriNetUnfolderBase]: 2098/3464 cut-off events. [2024-06-14 13:14:36,152 INFO L125 PetriNetUnfolderBase]: For 126072/126074 co-relation queries the response was YES. [2024-06-14 13:14:36,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20468 conditions, 3464 events. 2098/3464 cut-off events. For 126072/126074 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20248 event pairs, 501 based on Foata normal form. 2/3463 useless extension candidates. Maximal degree in co-relation 20382. Up to 3189 conditions per place. [2024-06-14 13:14:36,178 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 196 selfloop transitions, 34 changer transitions 0/235 dead transitions. [2024-06-14 13:14:36,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 235 transitions, 3027 flow [2024-06-14 13:14:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:14:36,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:14:36,180 INFO L175 Difference]: Start difference. First operand has 177 places, 205 transitions, 2223 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:14:36,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 235 transitions, 3027 flow [2024-06-14 13:14:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 235 transitions, 2943 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:36,345 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 2363 flow [2024-06-14 13:14:36,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2363, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2024-06-14 13:14:36,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 13:14:36,346 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 2363 flow [2024-06-14 13:14:36,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:36,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:36,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:36,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:14:36,346 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:36,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1626074999, now seen corresponding path program 2 times [2024-06-14 13:14:36,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:36,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950248595] [2024-06-14 13:14:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:36,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950248595] [2024-06-14 13:14:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950248595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:38,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:38,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661759192] [2024-06-14 13:14:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:38,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:38,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:38,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 2363 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:38,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:38,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:39,825 INFO L124 PetriNetUnfolderBase]: 2095/3461 cut-off events. [2024-06-14 13:14:39,826 INFO L125 PetriNetUnfolderBase]: For 131047/131049 co-relation queries the response was YES. [2024-06-14 13:14:39,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 3461 events. 2095/3461 cut-off events. For 131047/131049 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20185 event pairs, 503 based on Foata normal form. 1/3459 useless extension candidates. Maximal degree in co-relation 20869. Up to 3236 conditions per place. [2024-06-14 13:14:39,852 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 199 selfloop transitions, 27 changer transitions 0/231 dead transitions. [2024-06-14 13:14:39,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 231 transitions, 2949 flow [2024-06-14 13:14:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:14:39,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:14:39,853 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 2363 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:14:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 231 transitions, 2949 flow [2024-06-14 13:14:40,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 231 transitions, 2893 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 13:14:40,016 INFO L231 Difference]: Finished difference. Result has 186 places, 214 transitions, 2367 flow [2024-06-14 13:14:40,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2367, PETRI_PLACES=186, PETRI_TRANSITIONS=214} [2024-06-14 13:14:40,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 13:14:40,016 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 214 transitions, 2367 flow [2024-06-14 13:14:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:40,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:40,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:40,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:14:40,017 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:40,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 107434545, now seen corresponding path program 3 times [2024-06-14 13:14:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:40,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016320509] [2024-06-14 13:14:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:40,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:41,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:41,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016320509] [2024-06-14 13:14:41,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016320509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:41,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739117400] [2024-06-14 13:14:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:41,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:41,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 214 transitions, 2367 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:41,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:41,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:42,725 INFO L124 PetriNetUnfolderBase]: 2092/3461 cut-off events. [2024-06-14 13:14:42,725 INFO L125 PetriNetUnfolderBase]: For 133793/133795 co-relation queries the response was YES. [2024-06-14 13:14:42,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20819 conditions, 3461 events. 2092/3461 cut-off events. For 133793/133795 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20234 event pairs, 496 based on Foata normal form. 1/3461 useless extension candidates. Maximal degree in co-relation 20729. Up to 3242 conditions per place. [2024-06-14 13:14:42,755 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 209 selfloop transitions, 19 changer transitions 0/233 dead transitions. [2024-06-14 13:14:42,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 233 transitions, 2877 flow [2024-06-14 13:14:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:14:42,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:14:42,756 INFO L175 Difference]: Start difference. First operand has 186 places, 214 transitions, 2367 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:14:42,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 233 transitions, 2877 flow [2024-06-14 13:14:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 233 transitions, 2773 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:42,909 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 2311 flow [2024-06-14 13:14:42,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2311, PETRI_PLACES=185, PETRI_TRANSITIONS=214} [2024-06-14 13:14:42,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 13:14:42,910 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 2311 flow [2024-06-14 13:14:42,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:42,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:42,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:14:42,910 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:42,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 107434731, now seen corresponding path program 2 times [2024-06-14 13:14:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021788001] [2024-06-14 13:14:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021788001] [2024-06-14 13:14:44,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021788001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:44,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597300695] [2024-06-14 13:14:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:44,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:44,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:44,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 214 transitions, 2311 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:45,971 INFO L124 PetriNetUnfolderBase]: 2118/3503 cut-off events. [2024-06-14 13:14:45,971 INFO L125 PetriNetUnfolderBase]: For 141480/141482 co-relation queries the response was YES. [2024-06-14 13:14:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21192 conditions, 3503 events. 2118/3503 cut-off events. For 141480/141482 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20547 event pairs, 493 based on Foata normal form. 2/3504 useless extension candidates. Maximal degree in co-relation 21102. Up to 3236 conditions per place. [2024-06-14 13:14:46,000 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 212 selfloop transitions, 29 changer transitions 0/246 dead transitions. [2024-06-14 13:14:46,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 246 transitions, 3125 flow [2024-06-14 13:14:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:46,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:14:46,002 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 2311 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:46,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 246 transitions, 3125 flow [2024-06-14 13:14:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 246 transitions, 3077 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:46,182 INFO L231 Difference]: Finished difference. Result has 187 places, 220 transitions, 2429 flow [2024-06-14 13:14:46,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2429, PETRI_PLACES=187, PETRI_TRANSITIONS=220} [2024-06-14 13:14:46,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:14:46,183 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 220 transitions, 2429 flow [2024-06-14 13:14:46,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:46,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:14:46,183 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:46,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1769257055, now seen corresponding path program 3 times [2024-06-14 13:14:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507330489] [2024-06-14 13:14:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:48,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:48,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507330489] [2024-06-14 13:14:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507330489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:48,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893320181] [2024-06-14 13:14:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:48,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 220 transitions, 2429 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:48,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:48,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:48,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:49,422 INFO L124 PetriNetUnfolderBase]: 2112/3493 cut-off events. [2024-06-14 13:14:49,422 INFO L125 PetriNetUnfolderBase]: For 139533/139535 co-relation queries the response was YES. [2024-06-14 13:14:49,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21129 conditions, 3493 events. 2112/3493 cut-off events. For 139533/139535 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20454 event pairs, 494 based on Foata normal form. 2/3494 useless extension candidates. Maximal degree in co-relation 21038. Up to 3233 conditions per place. [2024-06-14 13:14:49,451 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-14 13:14:49,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 241 transitions, 3047 flow [2024-06-14 13:14:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:14:49,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:14:49,452 INFO L175 Difference]: Start difference. First operand has 187 places, 220 transitions, 2429 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:14:49,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 241 transitions, 3047 flow [2024-06-14 13:14:49,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 241 transitions, 2935 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:49,646 INFO L231 Difference]: Finished difference. Result has 191 places, 220 transitions, 2379 flow [2024-06-14 13:14:49,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2379, PETRI_PLACES=191, PETRI_TRANSITIONS=220} [2024-06-14 13:14:49,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 13:14:49,647 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 220 transitions, 2379 flow [2024-06-14 13:14:49,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:49,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:49,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:14:49,648 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:49,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 87125019, now seen corresponding path program 1 times [2024-06-14 13:14:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137149593] [2024-06-14 13:14:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137149593] [2024-06-14 13:14:52,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137149593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:52,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:52,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599822626] [2024-06-14 13:14:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:52,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:52,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 220 transitions, 2379 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:14:52,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:52,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:52,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:53,724 INFO L124 PetriNetUnfolderBase]: 1959/3293 cut-off events. [2024-06-14 13:14:53,724 INFO L125 PetriNetUnfolderBase]: For 145281/145303 co-relation queries the response was YES. [2024-06-14 13:14:53,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20085 conditions, 3293 events. 1959/3293 cut-off events. For 145281/145303 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19853 event pairs, 862 based on Foata normal form. 22/3296 useless extension candidates. Maximal degree in co-relation 19993. Up to 3020 conditions per place. [2024-06-14 13:14:53,752 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 15 changer transitions 0/237 dead transitions. [2024-06-14 13:14:53,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 237 transitions, 2906 flow [2024-06-14 13:14:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:14:53,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:14:53,753 INFO L175 Difference]: Start difference. First operand has 191 places, 220 transitions, 2379 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:14:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 237 transitions, 2906 flow [2024-06-14 13:14:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 237 transitions, 2838 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:53,999 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 2412 flow [2024-06-14 13:14:53,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2412, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-14 13:14:54,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 13:14:54,000 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 2412 flow [2024-06-14 13:14:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:14:54,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:54,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:14:54,000 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:54,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1420031157, now seen corresponding path program 1 times [2024-06-14 13:14:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:54,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973016508] [2024-06-14 13:14:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:56,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:56,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973016508] [2024-06-14 13:14:56,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973016508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:56,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:56,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:56,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380897863] [2024-06-14 13:14:56,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:56,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:56,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:56,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:56,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:56,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:56,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,127 INFO L124 PetriNetUnfolderBase]: 2279/3743 cut-off events. [2024-06-14 13:14:58,127 INFO L125 PetriNetUnfolderBase]: For 169176/169182 co-relation queries the response was YES. [2024-06-14 13:14:58,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23447 conditions, 3743 events. 2279/3743 cut-off events. For 169176/169182 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22122 event pairs, 705 based on Foata normal form. 9/3747 useless extension candidates. Maximal degree in co-relation 23353. Up to 3207 conditions per place. [2024-06-14 13:14:58,162 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 236 selfloop transitions, 78 changer transitions 0/319 dead transitions. [2024-06-14 13:14:58,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 319 transitions, 4473 flow [2024-06-14 13:14:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-14 13:14:58,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2024-06-14 13:14:58,164 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 2412 flow. Second operand 12 states and 211 transitions. [2024-06-14 13:14:58,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 319 transitions, 4473 flow [2024-06-14 13:14:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 319 transitions, 4406 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:58,456 INFO L231 Difference]: Finished difference. Result has 206 places, 264 transitions, 3132 flow [2024-06-14 13:14:58,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3132, PETRI_PLACES=206, PETRI_TRANSITIONS=264} [2024-06-14 13:14:58,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 13:14:58,457 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 264 transitions, 3132 flow [2024-06-14 13:14:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:58,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:58,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:14:58,457 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:58,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 15990177, now seen corresponding path program 2 times [2024-06-14 13:14:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:58,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652559511] [2024-06-14 13:14:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:01,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:01,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652559511] [2024-06-14 13:15:01,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652559511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:01,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:01,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063478672] [2024-06-14 13:15:01,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:01,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:01,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:01,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:01,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:01,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 264 transitions, 3132 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:01,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:01,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:01,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:02,664 INFO L124 PetriNetUnfolderBase]: 2330/3817 cut-off events. [2024-06-14 13:15:02,664 INFO L125 PetriNetUnfolderBase]: For 189943/189943 co-relation queries the response was YES. [2024-06-14 13:15:02,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25506 conditions, 3817 events. 2330/3817 cut-off events. For 189943/189943 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22418 event pairs, 486 based on Foata normal form. 5/3821 useless extension candidates. Maximal degree in co-relation 25407. Up to 3368 conditions per place. [2024-06-14 13:15:02,700 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 226 selfloop transitions, 86 changer transitions 0/317 dead transitions. [2024-06-14 13:15:02,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 317 transitions, 4243 flow [2024-06-14 13:15:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:15:02,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:15:02,704 INFO L175 Difference]: Start difference. First operand has 206 places, 264 transitions, 3132 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:15:02,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 317 transitions, 4243 flow [2024-06-14 13:15:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 317 transitions, 3948 flow, removed 136 selfloop flow, removed 2 redundant places. [2024-06-14 13:15:02,992 INFO L231 Difference]: Finished difference. Result has 217 places, 281 transitions, 3356 flow [2024-06-14 13:15:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3356, PETRI_PLACES=217, PETRI_TRANSITIONS=281} [2024-06-14 13:15:02,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 13:15:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 281 transitions, 3356 flow [2024-06-14 13:15:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:02,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:15:02,993 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:02,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 217842695, now seen corresponding path program 3 times [2024-06-14 13:15:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408011806] [2024-06-14 13:15:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408011806] [2024-06-14 13:15:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408011806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:05,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:05,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:05,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37703891] [2024-06-14 13:15:05,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:05,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:05,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 281 transitions, 3356 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:05,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:05,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:05,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:07,498 INFO L124 PetriNetUnfolderBase]: 2348/3847 cut-off events. [2024-06-14 13:15:07,498 INFO L125 PetriNetUnfolderBase]: For 198534/198540 co-relation queries the response was YES. [2024-06-14 13:15:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26172 conditions, 3847 events. 2348/3847 cut-off events. For 198534/198540 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22784 event pairs, 716 based on Foata normal form. 8/3850 useless extension candidates. Maximal degree in co-relation 26069. Up to 3400 conditions per place. [2024-06-14 13:15:07,534 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 237 selfloop transitions, 73 changer transitions 0/315 dead transitions. [2024-06-14 13:15:07,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 315 transitions, 4470 flow [2024-06-14 13:15:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:15:07,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:15:07,536 INFO L175 Difference]: Start difference. First operand has 217 places, 281 transitions, 3356 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:15:07,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 315 transitions, 4470 flow [2024-06-14 13:15:07,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 315 transitions, 4318 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:07,817 INFO L231 Difference]: Finished difference. Result has 219 places, 289 transitions, 3561 flow [2024-06-14 13:15:07,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3561, PETRI_PLACES=219, PETRI_TRANSITIONS=289} [2024-06-14 13:15:07,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:15:07,817 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 289 transitions, 3561 flow [2024-06-14 13:15:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:07,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:07,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:15:07,823 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:07,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1008865099, now seen corresponding path program 4 times [2024-06-14 13:15:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603353454] [2024-06-14 13:15:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603353454] [2024-06-14 13:15:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603353454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:10,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:10,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100011087] [2024-06-14 13:15:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:10,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:10,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 289 transitions, 3561 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:10,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:10,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:11,984 INFO L124 PetriNetUnfolderBase]: 2371/3883 cut-off events. [2024-06-14 13:15:11,984 INFO L125 PetriNetUnfolderBase]: For 205008/205008 co-relation queries the response was YES. [2024-06-14 13:15:12,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26857 conditions, 3883 events. 2371/3883 cut-off events. For 205008/205008 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22878 event pairs, 500 based on Foata normal form. 1/3883 useless extension candidates. Maximal degree in co-relation 26752. Up to 3536 conditions per place. [2024-06-14 13:15:12,018 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 64 changer transitions 0/323 dead transitions. [2024-06-14 13:15:12,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 323 transitions, 4590 flow [2024-06-14 13:15:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:15:12,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:15:12,020 INFO L175 Difference]: Start difference. First operand has 219 places, 289 transitions, 3561 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:15:12,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 323 transitions, 4590 flow [2024-06-14 13:15:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 323 transitions, 4409 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 13:15:12,306 INFO L231 Difference]: Finished difference. Result has 225 places, 302 transitions, 3794 flow [2024-06-14 13:15:12,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3794, PETRI_PLACES=225, PETRI_TRANSITIONS=302} [2024-06-14 13:15:12,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 13:15:12,306 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 302 transitions, 3794 flow [2024-06-14 13:15:12,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:12,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:12,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:15:12,307 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:12,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1839790893, now seen corresponding path program 5 times [2024-06-14 13:15:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:12,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397617914] [2024-06-14 13:15:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:12,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397617914] [2024-06-14 13:15:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397617914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:14,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:14,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:14,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552053261] [2024-06-14 13:15:14,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:14,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:14,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:14,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:14,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 302 transitions, 3794 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:14,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:14,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:14,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:16,291 INFO L124 PetriNetUnfolderBase]: 2373/3883 cut-off events. [2024-06-14 13:15:16,291 INFO L125 PetriNetUnfolderBase]: For 214795/214809 co-relation queries the response was YES. [2024-06-14 13:15:16,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26936 conditions, 3883 events. 2373/3883 cut-off events. For 214795/214809 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22996 event pairs, 734 based on Foata normal form. 14/3886 useless extension candidates. Maximal degree in co-relation 26829. Up to 3429 conditions per place. [2024-06-14 13:15:16,329 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 242 selfloop transitions, 86 changer transitions 0/333 dead transitions. [2024-06-14 13:15:16,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 333 transitions, 5035 flow [2024-06-14 13:15:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:15:16,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:15:16,331 INFO L175 Difference]: Start difference. First operand has 225 places, 302 transitions, 3794 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:15:16,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 333 transitions, 5035 flow [2024-06-14 13:15:16,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 333 transitions, 4887 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:16,636 INFO L231 Difference]: Finished difference. Result has 227 places, 310 transitions, 4023 flow [2024-06-14 13:15:16,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4023, PETRI_PLACES=227, PETRI_TRANSITIONS=310} [2024-06-14 13:15:16,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 13:15:16,637 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 310 transitions, 4023 flow [2024-06-14 13:15:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:16,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:16,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:15:16,637 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:16,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1828363053, now seen corresponding path program 6 times [2024-06-14 13:15:16,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:16,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374682621] [2024-06-14 13:15:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374682621] [2024-06-14 13:15:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374682621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:19,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245031721] [2024-06-14 13:15:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:19,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:19,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 310 transitions, 4023 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:19,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:19,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:20,546 INFO L124 PetriNetUnfolderBase]: 2378/3886 cut-off events. [2024-06-14 13:15:20,546 INFO L125 PetriNetUnfolderBase]: For 222612/222626 co-relation queries the response was YES. [2024-06-14 13:15:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27304 conditions, 3886 events. 2378/3886 cut-off events. For 222612/222626 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22923 event pairs, 729 based on Foata normal form. 13/3888 useless extension candidates. Maximal degree in co-relation 27196. Up to 3433 conditions per place. [2024-06-14 13:15:20,584 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 236 selfloop transitions, 90 changer transitions 0/331 dead transitions. [2024-06-14 13:15:20,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 331 transitions, 5031 flow [2024-06-14 13:15:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:15:20,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:15:20,585 INFO L175 Difference]: Start difference. First operand has 227 places, 310 transitions, 4023 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:15:20,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 331 transitions, 5031 flow [2024-06-14 13:15:20,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 331 transitions, 4839 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-14 13:15:20,899 INFO L231 Difference]: Finished difference. Result has 231 places, 313 transitions, 4102 flow [2024-06-14 13:15:20,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4102, PETRI_PLACES=231, PETRI_TRANSITIONS=313} [2024-06-14 13:15:20,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 13:15:20,900 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 313 transitions, 4102 flow [2024-06-14 13:15:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:20,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:20,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:20,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:15:20,901 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:20,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1607445835, now seen corresponding path program 7 times [2024-06-14 13:15:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767995624] [2024-06-14 13:15:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:20,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:23,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767995624] [2024-06-14 13:15:23,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767995624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:23,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:23,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328509546] [2024-06-14 13:15:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:23,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:23,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 313 transitions, 4102 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:23,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:23,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:23,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:25,175 INFO L124 PetriNetUnfolderBase]: 2383/3894 cut-off events. [2024-06-14 13:15:25,175 INFO L125 PetriNetUnfolderBase]: For 225263/225263 co-relation queries the response was YES. [2024-06-14 13:15:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27467 conditions, 3894 events. 2383/3894 cut-off events. For 225263/225263 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22946 event pairs, 495 based on Foata normal form. 1/3894 useless extension candidates. Maximal degree in co-relation 27357. Up to 3364 conditions per place. [2024-06-14 13:15:25,209 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 116 changer transitions 0/349 dead transitions. [2024-06-14 13:15:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 349 transitions, 5068 flow [2024-06-14 13:15:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:15:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:15:25,210 INFO L175 Difference]: Start difference. First operand has 231 places, 313 transitions, 4102 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:15:25,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 349 transitions, 5068 flow [2024-06-14 13:15:25,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 349 transitions, 4890 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 13:15:25,528 INFO L231 Difference]: Finished difference. Result has 237 places, 316 transitions, 4326 flow [2024-06-14 13:15:25,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3929, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4326, PETRI_PLACES=237, PETRI_TRANSITIONS=316} [2024-06-14 13:15:25,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 13:15:25,528 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 316 transitions, 4326 flow [2024-06-14 13:15:25,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:25,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:25,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:25,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:15:25,529 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:25,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1601731915, now seen corresponding path program 8 times [2024-06-14 13:15:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986712806] [2024-06-14 13:15:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986712806] [2024-06-14 13:15:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986712806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:27,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844794126] [2024-06-14 13:15:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:28,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:28,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 316 transitions, 4326 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:28,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:28,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:28,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:29,348 INFO L124 PetriNetUnfolderBase]: 2380/3893 cut-off events. [2024-06-14 13:15:29,348 INFO L125 PetriNetUnfolderBase]: For 233578/233582 co-relation queries the response was YES. [2024-06-14 13:15:29,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27860 conditions, 3893 events. 2380/3893 cut-off events. For 233578/233582 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22852 event pairs, 513 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 27747. Up to 3362 conditions per place. [2024-06-14 13:15:29,387 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 115 changer transitions 0/341 dead transitions. [2024-06-14 13:15:29,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 341 transitions, 5192 flow [2024-06-14 13:15:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:15:29,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:15:29,389 INFO L175 Difference]: Start difference. First operand has 237 places, 316 transitions, 4326 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:15:29,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 341 transitions, 5192 flow [2024-06-14 13:15:29,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 341 transitions, 4963 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:29,699 INFO L231 Difference]: Finished difference. Result has 238 places, 316 transitions, 4342 flow [2024-06-14 13:15:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4342, PETRI_PLACES=238, PETRI_TRANSITIONS=316} [2024-06-14 13:15:29,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 13:15:29,700 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 316 transitions, 4342 flow [2024-06-14 13:15:29,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:29,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:29,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:29,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:15:29,700 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:29,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash -831691078, now seen corresponding path program 1 times [2024-06-14 13:15:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898676657] [2024-06-14 13:15:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898676657] [2024-06-14 13:15:31,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898676657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:31,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:31,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:31,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229416535] [2024-06-14 13:15:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:31,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:31,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 316 transitions, 4342 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:31,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:31,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:33,181 INFO L124 PetriNetUnfolderBase]: 2390/3916 cut-off events. [2024-06-14 13:15:33,181 INFO L125 PetriNetUnfolderBase]: For 230920/230923 co-relation queries the response was YES. [2024-06-14 13:15:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27797 conditions, 3916 events. 2390/3916 cut-off events. For 230920/230923 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23325 event pairs, 943 based on Foata normal form. 4/3918 useless extension candidates. Maximal degree in co-relation 27683. Up to 3588 conditions per place. [2024-06-14 13:15:33,223 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 292 selfloop transitions, 41 changer transitions 0/338 dead transitions. [2024-06-14 13:15:33,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 338 transitions, 5207 flow [2024-06-14 13:15:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:15:33,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:15:33,225 INFO L175 Difference]: Start difference. First operand has 238 places, 316 transitions, 4342 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:15:33,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 338 transitions, 5207 flow [2024-06-14 13:15:33,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 338 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:33,663 INFO L231 Difference]: Finished difference. Result has 239 places, 319 transitions, 4253 flow [2024-06-14 13:15:33,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4253, PETRI_PLACES=239, PETRI_TRANSITIONS=319} [2024-06-14 13:15:33,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:15:33,664 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 319 transitions, 4253 flow [2024-06-14 13:15:33,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:33,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:33,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:33,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:15:33,664 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:33,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1102415618, now seen corresponding path program 2 times [2024-06-14 13:15:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:33,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553604703] [2024-06-14 13:15:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:33,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:35,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553604703] [2024-06-14 13:15:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553604703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:35,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471200185] [2024-06-14 13:15:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:35,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:35,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 319 transitions, 4253 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:35,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:35,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:35,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:38,164 INFO L124 PetriNetUnfolderBase]: 2400/3923 cut-off events. [2024-06-14 13:15:38,164 INFO L125 PetriNetUnfolderBase]: For 236149/236149 co-relation queries the response was YES. [2024-06-14 13:15:38,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27789 conditions, 3923 events. 2400/3923 cut-off events. For 236149/236149 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23277 event pairs, 942 based on Foata normal form. 2/3922 useless extension candidates. Maximal degree in co-relation 27674. Up to 3598 conditions per place. [2024-06-14 13:15:38,198 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 294 selfloop transitions, 48 changer transitions 0/347 dead transitions. [2024-06-14 13:15:38,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 347 transitions, 5268 flow [2024-06-14 13:15:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:15:38,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:15:38,199 INFO L175 Difference]: Start difference. First operand has 239 places, 319 transitions, 4253 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:15:38,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 347 transitions, 5268 flow [2024-06-14 13:15:38,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 347 transitions, 5145 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:38,584 INFO L231 Difference]: Finished difference. Result has 244 places, 322 transitions, 4275 flow [2024-06-14 13:15:38,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4275, PETRI_PLACES=244, PETRI_TRANSITIONS=322} [2024-06-14 13:15:38,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 13:15:38,585 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 322 transitions, 4275 flow [2024-06-14 13:15:38,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:38,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:38,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:15:38,586 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:38,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1828354962, now seen corresponding path program 3 times [2024-06-14 13:15:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:38,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381494575] [2024-06-14 13:15:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:40,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381494575] [2024-06-14 13:15:40,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381494575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:40,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:40,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464332825] [2024-06-14 13:15:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:40,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:40,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:40,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:40,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 322 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:40,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:40,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:40,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:42,667 INFO L124 PetriNetUnfolderBase]: 2394/3915 cut-off events. [2024-06-14 13:15:42,667 INFO L125 PetriNetUnfolderBase]: For 240175/240175 co-relation queries the response was YES. [2024-06-14 13:15:42,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27739 conditions, 3915 events. 2394/3915 cut-off events. For 240175/240175 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23213 event pairs, 941 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 27624. Up to 3593 conditions per place. [2024-06-14 13:15:42,705 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 292 selfloop transitions, 47 changer transitions 0/344 dead transitions. [2024-06-14 13:15:42,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 344 transitions, 5125 flow [2024-06-14 13:15:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:15:42,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:15:42,706 INFO L175 Difference]: Start difference. First operand has 244 places, 322 transitions, 4275 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:15:42,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 344 transitions, 5125 flow [2024-06-14 13:15:43,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 344 transitions, 4942 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 13:15:43,123 INFO L231 Difference]: Finished difference. Result has 242 places, 322 transitions, 4192 flow [2024-06-14 13:15:43,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4092, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4192, PETRI_PLACES=242, PETRI_TRANSITIONS=322} [2024-06-14 13:15:43,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 13:15:43,124 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 322 transitions, 4192 flow [2024-06-14 13:15:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:43,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:43,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:15:43,125 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:43,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1594366594, now seen corresponding path program 4 times [2024-06-14 13:15:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587783716] [2024-06-14 13:15:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:43,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:45,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587783716] [2024-06-14 13:15:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587783716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:45,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756977153] [2024-06-14 13:15:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:45,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:45,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 322 transitions, 4192 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:45,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:45,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:46,538 INFO L124 PetriNetUnfolderBase]: 2404/3933 cut-off events. [2024-06-14 13:15:46,538 INFO L125 PetriNetUnfolderBase]: For 246750/246750 co-relation queries the response was YES. [2024-06-14 13:15:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27780 conditions, 3933 events. 2404/3933 cut-off events. For 246750/246750 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23352 event pairs, 933 based on Foata normal form. 2/3934 useless extension candidates. Maximal degree in co-relation 27666. Up to 3638 conditions per place. [2024-06-14 13:15:46,578 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 33 changer transitions 0/345 dead transitions. [2024-06-14 13:15:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 345 transitions, 5076 flow [2024-06-14 13:15:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:15:46,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:15:46,579 INFO L175 Difference]: Start difference. First operand has 242 places, 322 transitions, 4192 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:15:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 345 transitions, 5076 flow [2024-06-14 13:15:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 345 transitions, 4976 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:46,986 INFO L231 Difference]: Finished difference. Result has 243 places, 325 transitions, 4199 flow [2024-06-14 13:15:46,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4199, PETRI_PLACES=243, PETRI_TRANSITIONS=325} [2024-06-14 13:15:46,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 13:15:46,987 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 325 transitions, 4199 flow [2024-06-14 13:15:46,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:46,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:46,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:15:46,987 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:46,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1601723824, now seen corresponding path program 5 times [2024-06-14 13:15:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082654291] [2024-06-14 13:15:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082654291] [2024-06-14 13:15:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082654291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411906237] [2024-06-14 13:15:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:48,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 325 transitions, 4199 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:50,240 INFO L124 PetriNetUnfolderBase]: 2398/3925 cut-off events. [2024-06-14 13:15:50,240 INFO L125 PetriNetUnfolderBase]: For 250640/250640 co-relation queries the response was YES. [2024-06-14 13:15:50,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27705 conditions, 3925 events. 2398/3925 cut-off events. For 250640/250640 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23276 event pairs, 934 based on Foata normal form. 2/3926 useless extension candidates. Maximal degree in co-relation 27590. Up to 3633 conditions per place. [2024-06-14 13:15:50,279 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 310 selfloop transitions, 33 changer transitions 0/348 dead transitions. [2024-06-14 13:15:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 348 transitions, 4951 flow [2024-06-14 13:15:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:15:50,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:15:50,285 INFO L175 Difference]: Start difference. First operand has 243 places, 325 transitions, 4199 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:15:50,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 348 transitions, 4951 flow [2024-06-14 13:15:50,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 4882 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:50,683 INFO L231 Difference]: Finished difference. Result has 245 places, 325 transitions, 4202 flow [2024-06-14 13:15:50,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4202, PETRI_PLACES=245, PETRI_TRANSITIONS=325} [2024-06-14 13:15:50,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:15:50,684 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 325 transitions, 4202 flow [2024-06-14 13:15:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:50,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:50,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:15:50,685 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:50,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1027055112, now seen corresponding path program 1 times [2024-06-14 13:15:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005712419] [2024-06-14 13:15:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005712419] [2024-06-14 13:15:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005712419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99901452] [2024-06-14 13:15:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:52,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:52,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 325 transitions, 4202 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:52,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:52,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:52,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:54,392 INFO L124 PetriNetUnfolderBase]: 2584/4205 cut-off events. [2024-06-14 13:15:54,392 INFO L125 PetriNetUnfolderBase]: For 264312/264318 co-relation queries the response was YES. [2024-06-14 13:15:54,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30111 conditions, 4205 events. 2584/4205 cut-off events. For 264312/264318 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24994 event pairs, 507 based on Foata normal form. 7/4205 useless extension candidates. Maximal degree in co-relation 29995. Up to 3312 conditions per place. [2024-06-14 13:15:54,439 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 260 selfloop transitions, 165 changer transitions 0/430 dead transitions. [2024-06-14 13:15:54,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 430 transitions, 6694 flow [2024-06-14 13:15:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:15:54,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 13:15:54,441 INFO L175 Difference]: Start difference. First operand has 245 places, 325 transitions, 4202 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:15:54,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 430 transitions, 6694 flow [2024-06-14 13:15:54,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 6594 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:54,904 INFO L231 Difference]: Finished difference. Result has 248 places, 374 transitions, 5446 flow [2024-06-14 13:15:54,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=248, PETRI_TRANSITIONS=374} [2024-06-14 13:15:54,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-14 13:15:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 374 transitions, 5446 flow [2024-06-14 13:15:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:54,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:54,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:54,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:15:54,905 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1427569346, now seen corresponding path program 2 times [2024-06-14 13:15:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194142264] [2024-06-14 13:15:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194142264] [2024-06-14 13:15:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194142264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:57,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:57,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554334075] [2024-06-14 13:15:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:57,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:58,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:58,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 374 transitions, 5446 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:58,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:58,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:58,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:59,858 INFO L124 PetriNetUnfolderBase]: 2641/4306 cut-off events. [2024-06-14 13:15:59,858 INFO L125 PetriNetUnfolderBase]: For 293350/293358 co-relation queries the response was YES. [2024-06-14 13:15:59,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32906 conditions, 4306 events. 2641/4306 cut-off events. For 293350/293358 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25666 event pairs, 490 based on Foata normal form. 12/4317 useless extension candidates. Maximal degree in co-relation 32786. Up to 3759 conditions per place. [2024-06-14 13:15:59,904 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 343 selfloop transitions, 101 changer transitions 0/449 dead transitions. [2024-06-14 13:15:59,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 449 transitions, 7066 flow [2024-06-14 13:15:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:15:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:15:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 228 transitions. [2024-06-14 13:15:59,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407871198568873 [2024-06-14 13:15:59,906 INFO L175 Difference]: Start difference. First operand has 248 places, 374 transitions, 5446 flow. Second operand 13 states and 228 transitions. [2024-06-14 13:15:59,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 449 transitions, 7066 flow [2024-06-14 13:16:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 449 transitions, 6907 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-14 13:16:00,418 INFO L231 Difference]: Finished difference. Result has 260 places, 388 transitions, 5840 flow [2024-06-14 13:16:00,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5353, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5840, PETRI_PLACES=260, PETRI_TRANSITIONS=388} [2024-06-14 13:16:00,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 13:16:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 388 transitions, 5840 flow [2024-06-14 13:16:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:00,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:00,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:16:00,419 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:00,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1260476432, now seen corresponding path program 1 times [2024-06-14 13:16:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:00,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80718670] [2024-06-14 13:16:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80718670] [2024-06-14 13:16:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80718670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:03,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405493916] [2024-06-14 13:16:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:03,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 388 transitions, 5840 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:04,909 INFO L124 PetriNetUnfolderBase]: 2663/4349 cut-off events. [2024-06-14 13:16:04,909 INFO L125 PetriNetUnfolderBase]: For 306578/306599 co-relation queries the response was YES. [2024-06-14 13:16:04,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33924 conditions, 4349 events. 2663/4349 cut-off events. For 306578/306599 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 26207 event pairs, 736 based on Foata normal form. 21/4366 useless extension candidates. Maximal degree in co-relation 33801. Up to 3833 conditions per place. [2024-06-14 13:16:04,957 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 335 selfloop transitions, 96 changer transitions 0/436 dead transitions. [2024-06-14 13:16:04,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 436 transitions, 7493 flow [2024-06-14 13:16:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:16:04,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:16:04,958 INFO L175 Difference]: Start difference. First operand has 260 places, 388 transitions, 5840 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:16:04,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 436 transitions, 7493 flow [2024-06-14 13:16:05,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 436 transitions, 7327 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:05,586 INFO L231 Difference]: Finished difference. Result has 262 places, 401 transitions, 6189 flow [2024-06-14 13:16:05,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6189, PETRI_PLACES=262, PETRI_TRANSITIONS=401} [2024-06-14 13:16:05,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:16:05,587 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 401 transitions, 6189 flow [2024-06-14 13:16:05,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:05,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:05,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:05,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:16:05,587 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:05,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1071291026, now seen corresponding path program 2 times [2024-06-14 13:16:05,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:05,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038031860] [2024-06-14 13:16:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038031860] [2024-06-14 13:16:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038031860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473199272] [2024-06-14 13:16:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:08,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:08,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 401 transitions, 6189 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:08,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:08,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:08,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:10,938 INFO L124 PetriNetUnfolderBase]: 2678/4367 cut-off events. [2024-06-14 13:16:10,938 INFO L125 PetriNetUnfolderBase]: For 317826/317834 co-relation queries the response was YES. [2024-06-14 13:16:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34408 conditions, 4367 events. 2678/4367 cut-off events. For 317826/317834 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 26261 event pairs, 732 based on Foata normal form. 11/4373 useless extension candidates. Maximal degree in co-relation 34281. Up to 3714 conditions per place. [2024-06-14 13:16:10,989 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 333 selfloop transitions, 120 changer transitions 0/458 dead transitions. [2024-06-14 13:16:10,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 458 transitions, 7999 flow [2024-06-14 13:16:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:16:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:16:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 234 transitions. [2024-06-14 13:16:10,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 13:16:10,991 INFO L175 Difference]: Start difference. First operand has 262 places, 401 transitions, 6189 flow. Second operand 14 states and 234 transitions. [2024-06-14 13:16:10,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 458 transitions, 7999 flow [2024-06-14 13:16:11,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 458 transitions, 7801 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:11,676 INFO L231 Difference]: Finished difference. Result has 273 places, 407 transitions, 6355 flow [2024-06-14 13:16:11,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6355, PETRI_PLACES=273, PETRI_TRANSITIONS=407} [2024-06-14 13:16:11,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 13:16:11,677 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 407 transitions, 6355 flow [2024-06-14 13:16:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:11,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:11,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:11,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:16:11,677 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:11,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1166118632, now seen corresponding path program 3 times [2024-06-14 13:16:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:11,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819967982] [2024-06-14 13:16:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:11,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819967982] [2024-06-14 13:16:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819967982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:14,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433712611] [2024-06-14 13:16:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:14,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:14,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 407 transitions, 6355 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:14,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:14,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:14,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:16,606 INFO L124 PetriNetUnfolderBase]: 2717/4425 cut-off events. [2024-06-14 13:16:16,606 INFO L125 PetriNetUnfolderBase]: For 340127/340127 co-relation queries the response was YES. [2024-06-14 13:16:16,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35437 conditions, 4425 events. 2717/4425 cut-off events. For 340127/340127 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26488 event pairs, 500 based on Foata normal form. 3/4427 useless extension candidates. Maximal degree in co-relation 35308. Up to 3853 conditions per place. [2024-06-14 13:16:16,661 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 347 selfloop transitions, 105 changer transitions 0/457 dead transitions. [2024-06-14 13:16:16,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 457 transitions, 7765 flow [2024-06-14 13:16:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:16:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:16:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-14 13:16:16,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:16:16,662 INFO L175 Difference]: Start difference. First operand has 273 places, 407 transitions, 6355 flow. Second operand 12 states and 200 transitions. [2024-06-14 13:16:16,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 457 transitions, 7765 flow [2024-06-14 13:16:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 457 transitions, 7457 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-14 13:16:17,397 INFO L231 Difference]: Finished difference. Result has 276 places, 417 transitions, 6515 flow [2024-06-14 13:16:17,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6049, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6515, PETRI_PLACES=276, PETRI_TRANSITIONS=417} [2024-06-14 13:16:17,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:16:17,398 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 417 transitions, 6515 flow [2024-06-14 13:16:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:17,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:17,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:16:17,398 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:17,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1437727922, now seen corresponding path program 3 times [2024-06-14 13:16:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015352304] [2024-06-14 13:16:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015352304] [2024-06-14 13:16:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015352304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:19,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:19,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913817731] [2024-06-14 13:16:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:19,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:19,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:19,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 417 transitions, 6515 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:19,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:19,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:21,328 INFO L124 PetriNetUnfolderBase]: 2696/4381 cut-off events. [2024-06-14 13:16:21,328 INFO L125 PetriNetUnfolderBase]: For 346748/346748 co-relation queries the response was YES. [2024-06-14 13:16:21,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35310 conditions, 4381 events. 2696/4381 cut-off events. For 346748/346748 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26143 event pairs, 496 based on Foata normal form. 7/4387 useless extension candidates. Maximal degree in co-relation 35179. Up to 3881 conditions per place. [2024-06-14 13:16:21,373 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 352 selfloop transitions, 95 changer transitions 0/452 dead transitions. [2024-06-14 13:16:21,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 452 transitions, 7539 flow [2024-06-14 13:16:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:16:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:16:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:16:21,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-14 13:16:21,374 INFO L175 Difference]: Start difference. First operand has 276 places, 417 transitions, 6515 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:16:21,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 452 transitions, 7539 flow [2024-06-14 13:16:22,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 452 transitions, 7334 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:22,036 INFO L231 Difference]: Finished difference. Result has 280 places, 417 transitions, 6526 flow [2024-06-14 13:16:22,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6526, PETRI_PLACES=280, PETRI_TRANSITIONS=417} [2024-06-14 13:16:22,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 13:16:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 417 transitions, 6526 flow [2024-06-14 13:16:22,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:22,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:22,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:22,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:16:22,037 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:22,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1437974186, now seen corresponding path program 1 times [2024-06-14 13:16:22,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:22,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103667465] [2024-06-14 13:16:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:22,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103667465] [2024-06-14 13:16:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103667465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:25,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879885547] [2024-06-14 13:16:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:16:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 417 transitions, 6526 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:16:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:27,362 INFO L124 PetriNetUnfolderBase]: 2589/4267 cut-off events. [2024-06-14 13:16:27,363 INFO L125 PetriNetUnfolderBase]: For 365794/365812 co-relation queries the response was YES. [2024-06-14 13:16:27,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34867 conditions, 4267 events. 2589/4267 cut-off events. For 365794/365812 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26018 event pairs, 478 based on Foata normal form. 30/4278 useless extension candidates. Maximal degree in co-relation 34734. Up to 3677 conditions per place. [2024-06-14 13:16:27,412 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 349 selfloop transitions, 59 changer transitions 0/456 dead transitions. [2024-06-14 13:16:27,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 456 transitions, 7532 flow [2024-06-14 13:16:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:16:27,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:16:27,413 INFO L175 Difference]: Start difference. First operand has 280 places, 417 transitions, 6526 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:16:27,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 456 transitions, 7532 flow [2024-06-14 13:16:28,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 456 transitions, 7358 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:28,097 INFO L231 Difference]: Finished difference. Result has 282 places, 423 transitions, 6561 flow [2024-06-14 13:16:28,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6360, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6561, PETRI_PLACES=282, PETRI_TRANSITIONS=423} [2024-06-14 13:16:28,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 13:16:28,098 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 423 transitions, 6561 flow [2024-06-14 13:16:28,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:28,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:28,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:28,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:16:28,098 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:28,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash -657328536, now seen corresponding path program 4 times [2024-06-14 13:16:28,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:28,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688424081] [2024-06-14 13:16:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:28,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688424081] [2024-06-14 13:16:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688424081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:31,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557797432] [2024-06-14 13:16:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:31,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:31,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:31,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 423 transitions, 6561 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:31,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:31,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:32,916 INFO L124 PetriNetUnfolderBase]: 2771/4521 cut-off events. [2024-06-14 13:16:32,916 INFO L125 PetriNetUnfolderBase]: For 360417/360425 co-relation queries the response was YES. [2024-06-14 13:16:32,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36822 conditions, 4521 events. 2771/4521 cut-off events. For 360417/360425 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27361 event pairs, 685 based on Foata normal form. 10/4530 useless extension candidates. Maximal degree in co-relation 36687. Up to 3966 conditions per place. [2024-06-14 13:16:32,973 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 114 changer transitions 0/477 dead transitions. [2024-06-14 13:16:32,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 477 transitions, 8059 flow [2024-06-14 13:16:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:16:32,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:16:32,975 INFO L175 Difference]: Start difference. First operand has 282 places, 423 transitions, 6561 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:16:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 477 transitions, 8059 flow [2024-06-14 13:16:33,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 477 transitions, 7963 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:33,697 INFO L231 Difference]: Finished difference. Result has 286 places, 438 transitions, 7058 flow [2024-06-14 13:16:33,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6465, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7058, PETRI_PLACES=286, PETRI_TRANSITIONS=438} [2024-06-14 13:16:33,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:16:33,698 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 438 transitions, 7058 flow [2024-06-14 13:16:33,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:33,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:33,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:16:33,699 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:33,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash 376240196, now seen corresponding path program 4 times [2024-06-14 13:16:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:33,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593937165] [2024-06-14 13:16:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:33,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:36,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593937165] [2024-06-14 13:16:36,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593937165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:36,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:36,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:36,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649965240] [2024-06-14 13:16:36,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:36,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:36,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 438 transitions, 7058 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:38,129 INFO L124 PetriNetUnfolderBase]: 2797/4547 cut-off events. [2024-06-14 13:16:38,130 INFO L125 PetriNetUnfolderBase]: For 381018/381042 co-relation queries the response was YES. [2024-06-14 13:16:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37870 conditions, 4547 events. 2797/4547 cut-off events. For 381018/381042 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27478 event pairs, 750 based on Foata normal form. 25/4568 useless extension candidates. Maximal degree in co-relation 37733. Up to 4021 conditions per place. [2024-06-14 13:16:38,185 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 353 selfloop transitions, 117 changer transitions 0/475 dead transitions. [2024-06-14 13:16:38,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 475 transitions, 8633 flow [2024-06-14 13:16:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:16:38,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:16:38,187 INFO L175 Difference]: Start difference. First operand has 286 places, 438 transitions, 7058 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:16:38,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 475 transitions, 8633 flow [2024-06-14 13:16:39,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 475 transitions, 8418 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:39,090 INFO L231 Difference]: Finished difference. Result has 288 places, 450 transitions, 7366 flow [2024-06-14 13:16:39,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6843, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7366, PETRI_PLACES=288, PETRI_TRANSITIONS=450} [2024-06-14 13:16:39,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 13:16:39,091 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 450 transitions, 7366 flow [2024-06-14 13:16:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:39,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:39,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:39,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:16:39,091 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:39,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash 376061450, now seen corresponding path program 5 times [2024-06-14 13:16:39,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:39,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249620870] [2024-06-14 13:16:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:39,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249620870] [2024-06-14 13:16:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249620870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237328215] [2024-06-14 13:16:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:42,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 450 transitions, 7366 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:42,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:42,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:42,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:44,577 INFO L124 PetriNetUnfolderBase]: 2820/4565 cut-off events. [2024-06-14 13:16:44,577 INFO L125 PetriNetUnfolderBase]: For 392986/392986 co-relation queries the response was YES. [2024-06-14 13:16:44,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38540 conditions, 4565 events. 2820/4565 cut-off events. For 392986/392986 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27304 event pairs, 562 based on Foata normal form. 2/4559 useless extension candidates. Maximal degree in co-relation 38401. Up to 3572 conditions per place. [2024-06-14 13:16:44,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 229 changer transitions 0/494 dead transitions. [2024-06-14 13:16:44,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 494 transitions, 9051 flow [2024-06-14 13:16:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:16:44,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:16:44,635 INFO L175 Difference]: Start difference. First operand has 288 places, 450 transitions, 7366 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:16:44,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 494 transitions, 9051 flow [2024-06-14 13:16:45,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 494 transitions, 8831 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:45,441 INFO L231 Difference]: Finished difference. Result has 293 places, 461 transitions, 7909 flow [2024-06-14 13:16:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7150, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7909, PETRI_PLACES=293, PETRI_TRANSITIONS=461} [2024-06-14 13:16:45,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:16:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 461 transitions, 7909 flow [2024-06-14 13:16:45,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:45,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:45,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:45,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:16:45,441 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:45,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 376360166, now seen corresponding path program 5 times [2024-06-14 13:16:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:45,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933166164] [2024-06-14 13:16:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:48,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933166164] [2024-06-14 13:16:48,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933166164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:48,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:48,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808083575] [2024-06-14 13:16:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:48,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:48,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 461 transitions, 7909 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:48,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:48,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:48,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:50,732 INFO L124 PetriNetUnfolderBase]: 2830/4608 cut-off events. [2024-06-14 13:16:50,732 INFO L125 PetriNetUnfolderBase]: For 400728/400736 co-relation queries the response was YES. [2024-06-14 13:16:50,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39339 conditions, 4608 events. 2830/4608 cut-off events. For 400728/400736 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27976 event pairs, 760 based on Foata normal form. 10/4613 useless extension candidates. Maximal degree in co-relation 39199. Up to 4065 conditions per place. [2024-06-14 13:16:50,783 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 365 selfloop transitions, 122 changer transitions 0/492 dead transitions. [2024-06-14 13:16:50,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 492 transitions, 9249 flow [2024-06-14 13:16:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:16:50,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:16:50,785 INFO L175 Difference]: Start difference. First operand has 293 places, 461 transitions, 7909 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:16:50,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 492 transitions, 9249 flow [2024-06-14 13:16:51,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 492 transitions, 8814 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:51,650 INFO L231 Difference]: Finished difference. Result has 297 places, 467 transitions, 7875 flow [2024-06-14 13:16:51,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7478, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7875, PETRI_PLACES=297, PETRI_TRANSITIONS=467} [2024-06-14 13:16:51,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 13:16:51,651 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 467 transitions, 7875 flow [2024-06-14 13:16:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:51,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:51,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:16:51,651 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:51,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1500219408, now seen corresponding path program 6 times [2024-06-14 13:16:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:51,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660448511] [2024-06-14 13:16:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:54,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660448511] [2024-06-14 13:16:54,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660448511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:54,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:54,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:54,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098580651] [2024-06-14 13:16:54,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:54,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:54,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 467 transitions, 7875 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:54,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:54,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:54,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:56,731 INFO L124 PetriNetUnfolderBase]: 2835/4588 cut-off events. [2024-06-14 13:16:56,732 INFO L125 PetriNetUnfolderBase]: For 407887/407887 co-relation queries the response was YES. [2024-06-14 13:16:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39063 conditions, 4588 events. 2835/4588 cut-off events. For 407887/407887 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27507 event pairs, 558 based on Foata normal form. 1/4581 useless extension candidates. Maximal degree in co-relation 38922. Up to 3584 conditions per place. [2024-06-14 13:16:56,795 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 236 changer transitions 0/498 dead transitions. [2024-06-14 13:16:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 498 transitions, 9361 flow [2024-06-14 13:16:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:16:56,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:16:56,796 INFO L175 Difference]: Start difference. First operand has 297 places, 467 transitions, 7875 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:16:56,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 498 transitions, 9361 flow [2024-06-14 13:16:57,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 498 transitions, 9049 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:57,621 INFO L231 Difference]: Finished difference. Result has 298 places, 470 transitions, 8119 flow [2024-06-14 13:16:57,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7567, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8119, PETRI_PLACES=298, PETRI_TRANSITIONS=470} [2024-06-14 13:16:57,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 13:16:57,622 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 470 transitions, 8119 flow [2024-06-14 13:16:57,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:57,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:57,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:16:57,623 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:57,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 376360352, now seen corresponding path program 1 times [2024-06-14 13:16:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043702309] [2024-06-14 13:16:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:00,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043702309] [2024-06-14 13:17:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043702309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:00,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289632373] [2024-06-14 13:17:00,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:00,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:00,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 470 transitions, 8119 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:00,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:02,589 INFO L124 PetriNetUnfolderBase]: 2871/4667 cut-off events. [2024-06-14 13:17:02,589 INFO L125 PetriNetUnfolderBase]: For 426693/426701 co-relation queries the response was YES. [2024-06-14 13:17:02,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40189 conditions, 4667 events. 2871/4667 cut-off events. For 426693/426701 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28305 event pairs, 761 based on Foata normal form. 12/4674 useless extension candidates. Maximal degree in co-relation 40048. Up to 3944 conditions per place. [2024-06-14 13:17:02,652 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 354 selfloop transitions, 157 changer transitions 0/516 dead transitions. [2024-06-14 13:17:02,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 516 transitions, 9952 flow [2024-06-14 13:17:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:17:02,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:17:02,654 INFO L175 Difference]: Start difference. First operand has 298 places, 470 transitions, 8119 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:17:02,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 516 transitions, 9952 flow [2024-06-14 13:17:03,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 516 transitions, 9494 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:03,740 INFO L231 Difference]: Finished difference. Result has 305 places, 482 transitions, 8286 flow [2024-06-14 13:17:03,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8286, PETRI_PLACES=305, PETRI_TRANSITIONS=482} [2024-06-14 13:17:03,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 13:17:03,741 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 482 transitions, 8286 flow [2024-06-14 13:17:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:03,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:03,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:17:03,741 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:03,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1506886020, now seen corresponding path program 2 times [2024-06-14 13:17:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868531737] [2024-06-14 13:17:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:06,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868531737] [2024-06-14 13:17:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868531737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703599977] [2024-06-14 13:17:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:06,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:06,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 482 transitions, 8286 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:06,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:06,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:08,907 INFO L124 PetriNetUnfolderBase]: 2985/4818 cut-off events. [2024-06-14 13:17:08,907 INFO L125 PetriNetUnfolderBase]: For 458629/458629 co-relation queries the response was YES. [2024-06-14 13:17:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42461 conditions, 4818 events. 2985/4818 cut-off events. For 458629/458629 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29050 event pairs, 522 based on Foata normal form. 4/4821 useless extension candidates. Maximal degree in co-relation 42317. Up to 4179 conditions per place. [2024-06-14 13:17:08,968 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 131 changer transitions 0/539 dead transitions. [2024-06-14 13:17:08,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 539 transitions, 10320 flow [2024-06-14 13:17:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:17:08,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-14 13:17:08,969 INFO L175 Difference]: Start difference. First operand has 305 places, 482 transitions, 8286 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:17:08,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 539 transitions, 10320 flow [2024-06-14 13:17:10,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 539 transitions, 9934 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:10,241 INFO L231 Difference]: Finished difference. Result has 311 places, 505 transitions, 8695 flow [2024-06-14 13:17:10,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7945, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8695, PETRI_PLACES=311, PETRI_TRANSITIONS=505} [2024-06-14 13:17:10,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:17:10,242 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 505 transitions, 8695 flow [2024-06-14 13:17:10,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:10,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:10,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:10,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:17:10,242 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:10,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1832167722, now seen corresponding path program 7 times [2024-06-14 13:17:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196082515] [2024-06-14 13:17:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196082515] [2024-06-14 13:17:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196082515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380802500] [2024-06-14 13:17:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:13,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:13,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 505 transitions, 8695 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:13,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:13,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:13,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:15,065 INFO L124 PetriNetUnfolderBase]: 2998/4847 cut-off events. [2024-06-14 13:17:15,065 INFO L125 PetriNetUnfolderBase]: For 465433/465433 co-relation queries the response was YES. [2024-06-14 13:17:15,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43167 conditions, 4847 events. 2998/4847 cut-off events. For 465433/465433 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29288 event pairs, 536 based on Foata normal form. 1/4847 useless extension candidates. Maximal degree in co-relation 43021. Up to 4393 conditions per place. [2024-06-14 13:17:15,132 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 443 selfloop transitions, 87 changer transitions 0/535 dead transitions. [2024-06-14 13:17:15,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 535 transitions, 10146 flow [2024-06-14 13:17:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:17:15,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:17:15,133 INFO L175 Difference]: Start difference. First operand has 311 places, 505 transitions, 8695 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:17:15,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 535 transitions, 10146 flow [2024-06-14 13:17:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 535 transitions, 9891 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:16,395 INFO L231 Difference]: Finished difference. Result has 314 places, 512 transitions, 8830 flow [2024-06-14 13:17:16,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8440, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8830, PETRI_PLACES=314, PETRI_TRANSITIONS=512} [2024-06-14 13:17:16,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:17:16,395 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 512 transitions, 8830 flow [2024-06-14 13:17:16,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:16,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:16,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:17:16,396 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:16,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1659677460, now seen corresponding path program 3 times [2024-06-14 13:17:16,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:16,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844341952] [2024-06-14 13:17:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:19,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:19,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844341952] [2024-06-14 13:17:19,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844341952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:19,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:19,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:19,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163700251] [2024-06-14 13:17:19,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:19,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:19,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:19,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:19,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 512 transitions, 8830 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:19,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:19,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:19,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:21,308 INFO L124 PetriNetUnfolderBase]: 2986/4830 cut-off events. [2024-06-14 13:17:21,308 INFO L125 PetriNetUnfolderBase]: For 472266/472266 co-relation queries the response was YES. [2024-06-14 13:17:21,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42833 conditions, 4830 events. 2986/4830 cut-off events. For 472266/472266 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29196 event pairs, 509 based on Foata normal form. 4/4833 useless extension candidates. Maximal degree in co-relation 42684. Up to 4191 conditions per place. [2024-06-14 13:17:21,376 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 140 changer transitions 0/548 dead transitions. [2024-06-14 13:17:21,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 548 transitions, 10343 flow [2024-06-14 13:17:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:17:21,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-14 13:17:21,378 INFO L175 Difference]: Start difference. First operand has 314 places, 512 transitions, 8830 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:17:21,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 548 transitions, 10343 flow [2024-06-14 13:17:22,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 548 transitions, 10145 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:22,723 INFO L231 Difference]: Finished difference. Result has 318 places, 516 transitions, 9079 flow [2024-06-14 13:17:22,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8632, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9079, PETRI_PLACES=318, PETRI_TRANSITIONS=516} [2024-06-14 13:17:22,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 13:17:22,723 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 516 transitions, 9079 flow [2024-06-14 13:17:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:22,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:22,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:17:22,724 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:22,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1659677646, now seen corresponding path program 6 times [2024-06-14 13:17:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834460878] [2024-06-14 13:17:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:25,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834460878] [2024-06-14 13:17:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834460878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:25,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:25,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:25,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033883616] [2024-06-14 13:17:25,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:25,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:25,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 516 transitions, 9079 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:25,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:25,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:25,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:27,215 INFO L124 PetriNetUnfolderBase]: 2983/4823 cut-off events. [2024-06-14 13:17:27,216 INFO L125 PetriNetUnfolderBase]: For 475715/475715 co-relation queries the response was YES. [2024-06-14 13:17:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43110 conditions, 4823 events. 2983/4823 cut-off events. For 475715/475715 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29170 event pairs, 529 based on Foata normal form. 1/4823 useless extension candidates. Maximal degree in co-relation 42960. Up to 4395 conditions per place. [2024-06-14 13:17:27,282 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 457 selfloop transitions, 75 changer transitions 0/537 dead transitions. [2024-06-14 13:17:27,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 537 transitions, 10222 flow [2024-06-14 13:17:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:17:27,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 13:17:27,283 INFO L175 Difference]: Start difference. First operand has 318 places, 516 transitions, 9079 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:17:27,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 537 transitions, 10222 flow [2024-06-14 13:17:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 537 transitions, 9862 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:28,501 INFO L231 Difference]: Finished difference. Result has 318 places, 516 transitions, 8893 flow [2024-06-14 13:17:28,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8719, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8893, PETRI_PLACES=318, PETRI_TRANSITIONS=516} [2024-06-14 13:17:28,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 13:17:28,501 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 516 transitions, 8893 flow [2024-06-14 13:17:28,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:28,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:17:28,502 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:28,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 553737950, now seen corresponding path program 2 times [2024-06-14 13:17:28,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:28,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344474147] [2024-06-14 13:17:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:32,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344474147] [2024-06-14 13:17:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344474147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:32,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:32,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542092779] [2024-06-14 13:17:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:32,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:32,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:32,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:17:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 516 transitions, 8893 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:32,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:32,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:17:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:34,338 INFO L124 PetriNetUnfolderBase]: 2859/4688 cut-off events. [2024-06-14 13:17:34,338 INFO L125 PetriNetUnfolderBase]: For 519348/519374 co-relation queries the response was YES. [2024-06-14 13:17:34,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42233 conditions, 4688 events. 2859/4688 cut-off events. For 519348/519374 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28923 event pairs, 498 based on Foata normal form. 30/4695 useless extension candidates. Maximal degree in co-relation 42082. Up to 3972 conditions per place. [2024-06-14 13:17:34,398 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 415 selfloop transitions, 69 changer transitions 0/545 dead transitions. [2024-06-14 13:17:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 545 transitions, 10003 flow [2024-06-14 13:17:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:17:34,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:17:34,399 INFO L175 Difference]: Start difference. First operand has 318 places, 516 transitions, 8893 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:17:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 545 transitions, 10003 flow [2024-06-14 13:17:35,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 545 transitions, 9871 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:35,575 INFO L231 Difference]: Finished difference. Result has 321 places, 517 transitions, 8932 flow [2024-06-14 13:17:35,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8761, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8932, PETRI_PLACES=321, PETRI_TRANSITIONS=517} [2024-06-14 13:17:35,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 13:17:35,575 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 517 transitions, 8932 flow [2024-06-14 13:17:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:35,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:35,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:17:35,576 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:35,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1199239670, now seen corresponding path program 8 times [2024-06-14 13:17:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669280838] [2024-06-14 13:17:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669280838] [2024-06-14 13:17:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669280838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521980462] [2024-06-14 13:17:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:38,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:38,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 517 transitions, 8932 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:38,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:38,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:38,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:40,593 INFO L124 PetriNetUnfolderBase]: 3029/4860 cut-off events. [2024-06-14 13:17:40,593 INFO L125 PetriNetUnfolderBase]: For 499957/499963 co-relation queries the response was YES. [2024-06-14 13:17:40,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43455 conditions, 4860 events. 3029/4860 cut-off events. For 499957/499963 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29041 event pairs, 619 based on Foata normal form. 4/4833 useless extension candidates. Maximal degree in co-relation 43303. Up to 3857 conditions per place. [2024-06-14 13:17:40,661 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 297 selfloop transitions, 252 changer transitions 0/554 dead transitions. [2024-06-14 13:17:40,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 554 transitions, 10870 flow [2024-06-14 13:17:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:17:40,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:17:40,663 INFO L175 Difference]: Start difference. First operand has 321 places, 517 transitions, 8932 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:17:40,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 554 transitions, 10870 flow [2024-06-14 13:17:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 554 transitions, 10727 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:42,066 INFO L231 Difference]: Finished difference. Result has 322 places, 525 transitions, 9573 flow [2024-06-14 13:17:42,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8795, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9573, PETRI_PLACES=322, PETRI_TRANSITIONS=525} [2024-06-14 13:17:42,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 13:17:42,066 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 525 transitions, 9573 flow [2024-06-14 13:17:42,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:42,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:42,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:17:42,066 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1185933430, now seen corresponding path program 7 times [2024-06-14 13:17:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769724884] [2024-06-14 13:17:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769724884] [2024-06-14 13:17:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769724884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:45,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:45,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233394958] [2024-06-14 13:17:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:45,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:45,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 525 transitions, 9573 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:45,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:45,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:45,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:47,175 INFO L124 PetriNetUnfolderBase]: 3031/4906 cut-off events. [2024-06-14 13:17:47,175 INFO L125 PetriNetUnfolderBase]: For 501802/501818 co-relation queries the response was YES. [2024-06-14 13:17:47,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44041 conditions, 4906 events. 3031/4906 cut-off events. For 501802/501818 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29895 event pairs, 797 based on Foata normal form. 16/4910 useless extension candidates. Maximal degree in co-relation 43888. Up to 4353 conditions per place. [2024-06-14 13:17:47,247 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 128 changer transitions 0/550 dead transitions. [2024-06-14 13:17:47,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 550 transitions, 10974 flow [2024-06-14 13:17:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:17:47,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:17:47,249 INFO L175 Difference]: Start difference. First operand has 322 places, 525 transitions, 9573 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:17:47,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 550 transitions, 10974 flow [2024-06-14 13:17:48,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 550 transitions, 10537 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:48,851 INFO L231 Difference]: Finished difference. Result has 325 places, 528 transitions, 9477 flow [2024-06-14 13:17:48,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9139, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9477, PETRI_PLACES=325, PETRI_TRANSITIONS=528} [2024-06-14 13:17:48,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 13:17:48,851 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 528 transitions, 9477 flow [2024-06-14 13:17:48,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:48,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:48,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:48,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:17:48,852 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:48,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash -108062382, now seen corresponding path program 4 times [2024-06-14 13:17:48,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409110951] [2024-06-14 13:17:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:48,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409110951] [2024-06-14 13:17:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409110951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:51,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641682687] [2024-06-14 13:17:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:51,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:51,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 528 transitions, 9477 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:51,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:51,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:51,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:53,653 INFO L124 PetriNetUnfolderBase]: 3035/4906 cut-off events. [2024-06-14 13:17:53,654 INFO L125 PetriNetUnfolderBase]: For 510182/510198 co-relation queries the response was YES. [2024-06-14 13:17:53,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43673 conditions, 4906 events. 3035/4906 cut-off events. For 510182/510198 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29780 event pairs, 799 based on Foata normal form. 18/4912 useless extension candidates. Maximal degree in co-relation 43519. Up to 4336 conditions per place. [2024-06-14 13:17:53,720 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 136 changer transitions 0/562 dead transitions. [2024-06-14 13:17:53,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 562 transitions, 11207 flow [2024-06-14 13:17:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:17:53,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:17:53,721 INFO L175 Difference]: Start difference. First operand has 325 places, 528 transitions, 9477 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:17:53,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 562 transitions, 11207 flow [2024-06-14 13:17:55,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 562 transitions, 10809 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:55,067 INFO L231 Difference]: Finished difference. Result has 327 places, 536 transitions, 9580 flow [2024-06-14 13:17:55,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9079, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9580, PETRI_PLACES=327, PETRI_TRANSITIONS=536} [2024-06-14 13:17:55,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 13:17:55,068 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 536 transitions, 9580 flow [2024-06-14 13:17:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:55,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:55,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:17:55,068 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -9517826, now seen corresponding path program 9 times [2024-06-14 13:17:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986992536] [2024-06-14 13:17:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:58,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986992536] [2024-06-14 13:17:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986992536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:58,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:58,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:58,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558265389] [2024-06-14 13:17:58,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:58,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:58,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:58,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:58,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 536 transitions, 9580 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:58,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:58,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:58,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:59,993 INFO L124 PetriNetUnfolderBase]: 3040/4874 cut-off events. [2024-06-14 13:17:59,993 INFO L125 PetriNetUnfolderBase]: For 510863/510869 co-relation queries the response was YES. [2024-06-14 13:18:00,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43889 conditions, 4874 events. 3040/4874 cut-off events. For 510863/510869 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29192 event pairs, 616 based on Foata normal form. 3/4845 useless extension candidates. Maximal degree in co-relation 43735. Up to 3869 conditions per place. [2024-06-14 13:18:00,060 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 254 changer transitions 0/565 dead transitions. [2024-06-14 13:18:00,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 565 transitions, 11356 flow [2024-06-14 13:18:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:18:00,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:18:00,062 INFO L175 Difference]: Start difference. First operand has 327 places, 536 transitions, 9580 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:18:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 565 transitions, 11356 flow [2024-06-14 13:18:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 565 transitions, 11082 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:01,498 INFO L231 Difference]: Finished difference. Result has 330 places, 539 transitions, 9897 flow [2024-06-14 13:18:01,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9306, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9897, PETRI_PLACES=330, PETRI_TRANSITIONS=539} [2024-06-14 13:18:01,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 13:18:01,498 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 539 transitions, 9897 flow [2024-06-14 13:18:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:01,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:01,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:01,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:18:01,499 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:01,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash -969479016, now seen corresponding path program 8 times [2024-06-14 13:18:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475352352] [2024-06-14 13:18:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475352352] [2024-06-14 13:18:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475352352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:04,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808340610] [2024-06-14 13:18:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:04,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:04,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 539 transitions, 9897 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:04,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:04,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:04,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:06,083 INFO L124 PetriNetUnfolderBase]: 3042/4946 cut-off events. [2024-06-14 13:18:06,083 INFO L125 PetriNetUnfolderBase]: For 521116/521170 co-relation queries the response was YES. [2024-06-14 13:18:06,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44465 conditions, 4946 events. 3042/4946 cut-off events. For 521116/521170 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30380 event pairs, 799 based on Foata normal form. 41/4978 useless extension candidates. Maximal degree in co-relation 44309. Up to 4369 conditions per place. [2024-06-14 13:18:06,148 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 434 selfloop transitions, 125 changer transitions 0/564 dead transitions. [2024-06-14 13:18:06,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 564 transitions, 11493 flow [2024-06-14 13:18:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:18:06,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:18:06,149 INFO L175 Difference]: Start difference. First operand has 330 places, 539 transitions, 9897 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:18:06,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 564 transitions, 11493 flow [2024-06-14 13:18:07,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 564 transitions, 10933 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:07,558 INFO L231 Difference]: Finished difference. Result has 332 places, 542 transitions, 9672 flow [2024-06-14 13:18:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9341, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9672, PETRI_PLACES=332, PETRI_TRANSITIONS=542} [2024-06-14 13:18:07,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:18:07,559 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 542 transitions, 9672 flow [2024-06-14 13:18:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:07,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:18:07,559 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash 100651776, now seen corresponding path program 9 times [2024-06-14 13:18:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596508842] [2024-06-14 13:18:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:09,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596508842] [2024-06-14 13:18:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596508842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:09,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:09,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:09,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318547474] [2024-06-14 13:18:09,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:09,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:09,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:09,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 542 transitions, 9672 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:09,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:09,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:09,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:11,760 INFO L124 PetriNetUnfolderBase]: 3047/4945 cut-off events. [2024-06-14 13:18:11,760 INFO L125 PetriNetUnfolderBase]: For 524331/524385 co-relation queries the response was YES. [2024-06-14 13:18:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44150 conditions, 4945 events. 3047/4945 cut-off events. For 524331/524385 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30338 event pairs, 788 based on Foata normal form. 40/4976 useless extension candidates. Maximal degree in co-relation 43993. Up to 4375 conditions per place. [2024-06-14 13:18:11,829 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 429 selfloop transitions, 128 changer transitions 0/562 dead transitions. [2024-06-14 13:18:11,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 562 transitions, 11085 flow [2024-06-14 13:18:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:18:11,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:18:11,830 INFO L175 Difference]: Start difference. First operand has 332 places, 542 transitions, 9672 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:18:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 562 transitions, 11085 flow [2024-06-14 13:18:13,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 562 transitions, 10703 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:13,547 INFO L231 Difference]: Finished difference. Result has 333 places, 545 transitions, 9630 flow [2024-06-14 13:18:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9630, PETRI_PLACES=333, PETRI_TRANSITIONS=545} [2024-06-14 13:18:13,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:18:13,548 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 545 transitions, 9630 flow [2024-06-14 13:18:13,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:13,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:13,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:18:13,548 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 184669440, now seen corresponding path program 10 times [2024-06-14 13:18:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630131101] [2024-06-14 13:18:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630131101] [2024-06-14 13:18:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630131101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145629210] [2024-06-14 13:18:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:16,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:16,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 545 transitions, 9630 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:16,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:16,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:18,288 INFO L124 PetriNetUnfolderBase]: 3044/4932 cut-off events. [2024-06-14 13:18:18,288 INFO L125 PetriNetUnfolderBase]: For 529916/529932 co-relation queries the response was YES. [2024-06-14 13:18:18,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 4932 events. 3044/4932 cut-off events. For 529916/529932 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30106 event pairs, 796 based on Foata normal form. 15/4935 useless extension candidates. Maximal degree in co-relation 43869. Up to 4372 conditions per place. [2024-06-14 13:18:18,351 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 135 changer transitions 0/564 dead transitions. [2024-06-14 13:18:18,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 564 transitions, 11139 flow [2024-06-14 13:18:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:18:18,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:18:18,353 INFO L175 Difference]: Start difference. First operand has 333 places, 545 transitions, 9630 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:18:18,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 564 transitions, 11139 flow [2024-06-14 13:18:19,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 564 transitions, 10933 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:20,005 INFO L231 Difference]: Finished difference. Result has 337 places, 545 transitions, 9700 flow [2024-06-14 13:18:20,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9424, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9700, PETRI_PLACES=337, PETRI_TRANSITIONS=545} [2024-06-14 13:18:20,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 13:18:20,006 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 545 transitions, 9700 flow [2024-06-14 13:18:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:20,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:20,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:18:20,006 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:20,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash -97885392, now seen corresponding path program 5 times [2024-06-14 13:18:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:20,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307815416] [2024-06-14 13:18:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307815416] [2024-06-14 13:18:23,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307815416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:23,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:23,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:23,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293417264] [2024-06-14 13:18:23,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:23,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:23,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:23,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:23,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:23,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:23,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 545 transitions, 9700 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:23,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:25,133 INFO L124 PetriNetUnfolderBase]: 3054/4943 cut-off events. [2024-06-14 13:18:25,133 INFO L125 PetriNetUnfolderBase]: For 547125/547141 co-relation queries the response was YES. [2024-06-14 13:18:25,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44384 conditions, 4943 events. 3054/4943 cut-off events. For 547125/547141 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30119 event pairs, 804 based on Foata normal form. 16/4947 useless extension candidates. Maximal degree in co-relation 44226. Up to 4380 conditions per place. [2024-06-14 13:18:25,199 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 138 changer transitions 0/567 dead transitions. [2024-06-14 13:18:25,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 567 transitions, 11131 flow [2024-06-14 13:18:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:18:25,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:18:25,200 INFO L175 Difference]: Start difference. First operand has 337 places, 545 transitions, 9700 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:18:25,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 567 transitions, 11131 flow [2024-06-14 13:18:26,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 567 transitions, 10857 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:26,970 INFO L231 Difference]: Finished difference. Result has 340 places, 548 transitions, 9790 flow [2024-06-14 13:18:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9790, PETRI_PLACES=340, PETRI_TRANSITIONS=548} [2024-06-14 13:18:26,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 13:18:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 548 transitions, 9790 flow [2024-06-14 13:18:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:18:26,971 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -716814218, now seen corresponding path program 11 times [2024-06-14 13:18:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964146803] [2024-06-14 13:18:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:30,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964146803] [2024-06-14 13:18:30,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964146803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:30,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:30,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:30,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077541861] [2024-06-14 13:18:30,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:30,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:30,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:30,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:30,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 548 transitions, 9790 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:30,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:30,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:30,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:32,525 INFO L124 PetriNetUnfolderBase]: 3051/4946 cut-off events. [2024-06-14 13:18:32,525 INFO L125 PetriNetUnfolderBase]: For 552101/552117 co-relation queries the response was YES. [2024-06-14 13:18:32,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44266 conditions, 4946 events. 3051/4946 cut-off events. For 552101/552117 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30213 event pairs, 798 based on Foata normal form. 15/4949 useless extension candidates. Maximal degree in co-relation 44107. Up to 4383 conditions per place. [2024-06-14 13:18:32,594 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 427 selfloop transitions, 136 changer transitions 0/568 dead transitions. [2024-06-14 13:18:32,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 568 transitions, 11149 flow [2024-06-14 13:18:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:18:32,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-14 13:18:32,596 INFO L175 Difference]: Start difference. First operand has 340 places, 548 transitions, 9790 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:18:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 568 transitions, 11149 flow [2024-06-14 13:18:34,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 568 transitions, 10811 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:34,536 INFO L231 Difference]: Finished difference. Result has 344 places, 548 transitions, 9730 flow [2024-06-14 13:18:34,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9452, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9730, PETRI_PLACES=344, PETRI_TRANSITIONS=548} [2024-06-14 13:18:34,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 13:18:34,536 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 548 transitions, 9730 flow [2024-06-14 13:18:34,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:34,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:34,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:18:34,537 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:34,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash 246200286, now seen corresponding path program 10 times [2024-06-14 13:18:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067742739] [2024-06-14 13:18:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:34,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067742739] [2024-06-14 13:18:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067742739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:37,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:37,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874656959] [2024-06-14 13:18:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:37,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:37,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 548 transitions, 9730 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:37,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:37,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:37,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:39,634 INFO L124 PetriNetUnfolderBase]: 3056/4907 cut-off events. [2024-06-14 13:18:39,634 INFO L125 PetriNetUnfolderBase]: For 563354/563360 co-relation queries the response was YES. [2024-06-14 13:18:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 4907 events. 3056/4907 cut-off events. For 563354/563360 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29461 event pairs, 621 based on Foata normal form. 3/4878 useless extension candidates. Maximal degree in co-relation 44160. Up to 3889 conditions per place. [2024-06-14 13:18:39,699 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 267 changer transitions 0/571 dead transitions. [2024-06-14 13:18:39,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 571 transitions, 11354 flow [2024-06-14 13:18:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:18:39,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:18:39,701 INFO L175 Difference]: Start difference. First operand has 344 places, 548 transitions, 9730 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:18:39,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 571 transitions, 11354 flow [2024-06-14 13:18:41,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 571 transitions, 10964 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:18:41,300 INFO L231 Difference]: Finished difference. Result has 342 places, 551 transitions, 9959 flow [2024-06-14 13:18:41,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9959, PETRI_PLACES=342, PETRI_TRANSITIONS=551} [2024-06-14 13:18:41,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 13:18:41,301 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 551 transitions, 9959 flow [2024-06-14 13:18:41,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:41,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:41,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:41,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:18:41,301 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:41,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash -844665638, now seen corresponding path program 6 times [2024-06-14 13:18:41,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:41,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026304675] [2024-06-14 13:18:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:41,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:43,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026304675] [2024-06-14 13:18:43,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026304675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:43,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:43,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:43,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972872185] [2024-06-14 13:18:43,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:43,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:43,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:43,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:43,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 551 transitions, 9959 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:43,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:43,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:43,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:45,959 INFO L124 PetriNetUnfolderBase]: 3066/4956 cut-off events. [2024-06-14 13:18:45,959 INFO L125 PetriNetUnfolderBase]: For 581039/581055 co-relation queries the response was YES. [2024-06-14 13:18:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45085 conditions, 4956 events. 3066/4956 cut-off events. For 581039/581055 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30186 event pairs, 811 based on Foata normal form. 16/4960 useless extension candidates. Maximal degree in co-relation 44925. Up to 4047 conditions per place. [2024-06-14 13:18:46,029 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 388 selfloop transitions, 193 changer transitions 0/586 dead transitions. [2024-06-14 13:18:46,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 586 transitions, 11794 flow [2024-06-14 13:18:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:18:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:18:46,030 INFO L175 Difference]: Start difference. First operand has 342 places, 551 transitions, 9959 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:18:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 586 transitions, 11794 flow [2024-06-14 13:18:47,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 586 transitions, 11294 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:47,840 INFO L231 Difference]: Finished difference. Result has 346 places, 562 transitions, 10243 flow [2024-06-14 13:18:47,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10243, PETRI_PLACES=346, PETRI_TRANSITIONS=562} [2024-06-14 13:18:47,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 13:18:47,840 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 562 transitions, 10243 flow [2024-06-14 13:18:47,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:47,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:47,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:47,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:18:47,841 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:47,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -557626804, now seen corresponding path program 7 times [2024-06-14 13:18:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:47,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248868103] [2024-06-14 13:18:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248868103] [2024-06-14 13:18:50,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248868103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:50,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:50,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605770661] [2024-06-14 13:18:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:50,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:50,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 562 transitions, 10243 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:50,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:50,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:50,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:52,650 INFO L124 PetriNetUnfolderBase]: 3172/5104 cut-off events. [2024-06-14 13:18:52,650 INFO L125 PetriNetUnfolderBase]: For 640258/640264 co-relation queries the response was YES. [2024-06-14 13:18:52,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48392 conditions, 5104 events. 3172/5104 cut-off events. For 640258/640264 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30775 event pairs, 533 based on Foata normal form. 4/5100 useless extension candidates. Maximal degree in co-relation 48230. Up to 4016 conditions per place. [2024-06-14 13:18:52,721 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 370 selfloop transitions, 242 changer transitions 0/617 dead transitions. [2024-06-14 13:18:52,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 617 transitions, 12726 flow [2024-06-14 13:18:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:18:52,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:18:52,723 INFO L175 Difference]: Start difference. First operand has 346 places, 562 transitions, 10243 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:18:52,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 617 transitions, 12726 flow [2024-06-14 13:18:54,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 617 transitions, 12554 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:54,748 INFO L231 Difference]: Finished difference. Result has 352 places, 583 transitions, 11263 flow [2024-06-14 13:18:54,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10089, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11263, PETRI_PLACES=352, PETRI_TRANSITIONS=583} [2024-06-14 13:18:54,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 13:18:54,748 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 583 transitions, 11263 flow [2024-06-14 13:18:54,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:54,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:18:54,749 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:54,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1886157218, now seen corresponding path program 12 times [2024-06-14 13:18:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:54,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230471448] [2024-06-14 13:18:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:57,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:57,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230471448] [2024-06-14 13:18:57,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230471448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:57,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:57,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876598171] [2024-06-14 13:18:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:57,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 583 transitions, 11263 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:57,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:59,289 INFO L124 PetriNetUnfolderBase]: 3169/5096 cut-off events. [2024-06-14 13:18:59,289 INFO L125 PetriNetUnfolderBase]: For 648513/648519 co-relation queries the response was YES. [2024-06-14 13:18:59,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49590 conditions, 5096 events. 3169/5096 cut-off events. For 648513/648519 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30789 event pairs, 554 based on Foata normal form. 3/5091 useless extension candidates. Maximal degree in co-relation 49424. Up to 4426 conditions per place. [2024-06-14 13:18:59,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 146 changer transitions 0/611 dead transitions. [2024-06-14 13:18:59,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 611 transitions, 12775 flow [2024-06-14 13:18:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:18:59,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:18:59,358 INFO L175 Difference]: Start difference. First operand has 352 places, 583 transitions, 11263 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:18:59,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 611 transitions, 12775 flow [2024-06-14 13:19:01,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 611 transitions, 12608 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:01,163 INFO L231 Difference]: Finished difference. Result has 357 places, 583 transitions, 11400 flow [2024-06-14 13:19:01,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11096, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11400, PETRI_PLACES=357, PETRI_TRANSITIONS=583} [2024-06-14 13:19:01,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-14 13:19:01,163 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 583 transitions, 11400 flow [2024-06-14 13:19:01,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:01,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:01,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:19:01,164 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:01,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash -550967074, now seen corresponding path program 8 times [2024-06-14 13:19:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127509658] [2024-06-14 13:19:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127509658] [2024-06-14 13:19:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127509658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:03,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:03,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:03,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802609588] [2024-06-14 13:19:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:04,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:04,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 583 transitions, 11400 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:04,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:04,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:04,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:06,038 INFO L124 PetriNetUnfolderBase]: 3179/5123 cut-off events. [2024-06-14 13:19:06,038 INFO L125 PetriNetUnfolderBase]: For 664143/664149 co-relation queries the response was YES. [2024-06-14 13:19:06,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5123 events. 3179/5123 cut-off events. For 664143/664149 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31027 event pairs, 514 based on Foata normal form. 4/5119 useless extension candidates. Maximal degree in co-relation 50058. Up to 4020 conditions per place. [2024-06-14 13:19:06,115 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 377 selfloop transitions, 232 changer transitions 0/614 dead transitions. [2024-06-14 13:19:06,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 614 transitions, 13383 flow [2024-06-14 13:19:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:19:06,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:19:06,116 INFO L175 Difference]: Start difference. First operand has 357 places, 583 transitions, 11400 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:19:06,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 614 transitions, 13383 flow [2024-06-14 13:19:08,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 614 transitions, 12993 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:08,068 INFO L231 Difference]: Finished difference. Result has 358 places, 586 transitions, 11586 flow [2024-06-14 13:19:08,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11016, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11586, PETRI_PLACES=358, PETRI_TRANSITIONS=586} [2024-06-14 13:19:08,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:19:08,069 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 586 transitions, 11586 flow [2024-06-14 13:19:08,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:08,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:08,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:08,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:19:08,069 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:08,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1427147708, now seen corresponding path program 9 times [2024-06-14 13:19:08,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:08,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343668421] [2024-06-14 13:19:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:08,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343668421] [2024-06-14 13:19:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343668421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89230260] [2024-06-14 13:19:10,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:10,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:11,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:11,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 586 transitions, 11586 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:11,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:11,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:11,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:13,445 INFO L124 PetriNetUnfolderBase]: 3199/5159 cut-off events. [2024-06-14 13:19:13,446 INFO L125 PetriNetUnfolderBase]: For 670607/670613 co-relation queries the response was YES. [2024-06-14 13:19:13,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50800 conditions, 5159 events. 3199/5159 cut-off events. For 670607/670613 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31326 event pairs, 510 based on Foata normal form. 6/5157 useless extension candidates. Maximal degree in co-relation 50632. Up to 4038 conditions per place. [2024-06-14 13:19:13,533 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 384 selfloop transitions, 233 changer transitions 0/622 dead transitions. [2024-06-14 13:19:13,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 622 transitions, 13685 flow [2024-06-14 13:19:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:19:13,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:19:13,535 INFO L175 Difference]: Start difference. First operand has 358 places, 586 transitions, 11586 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:19:13,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 622 transitions, 13685 flow [2024-06-14 13:19:15,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 622 transitions, 13078 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:15,457 INFO L231 Difference]: Finished difference. Result has 362 places, 592 transitions, 11651 flow [2024-06-14 13:19:15,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11009, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11651, PETRI_PLACES=362, PETRI_TRANSITIONS=592} [2024-06-14 13:19:15,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 13:19:15,458 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 592 transitions, 11651 flow [2024-06-14 13:19:15,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:15,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:15,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:19:15,458 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:15,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1885920254, now seen corresponding path program 10 times [2024-06-14 13:19:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:15,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988855013] [2024-06-14 13:19:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:18,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988855013] [2024-06-14 13:19:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988855013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931244540] [2024-06-14 13:19:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:18,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:18,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 592 transitions, 11651 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:18,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:18,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:18,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:20,263 INFO L124 PetriNetUnfolderBase]: 3193/5140 cut-off events. [2024-06-14 13:19:20,263 INFO L125 PetriNetUnfolderBase]: For 672647/672653 co-relation queries the response was YES. [2024-06-14 13:19:20,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50390 conditions, 5140 events. 3193/5140 cut-off events. For 672647/672653 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31143 event pairs, 561 based on Foata normal form. 4/5136 useless extension candidates. Maximal degree in co-relation 50221. Up to 4454 conditions per place. [2024-06-14 13:19:20,346 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 149 changer transitions 0/622 dead transitions. [2024-06-14 13:19:20,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 622 transitions, 13195 flow [2024-06-14 13:19:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:19:20,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:19:20,347 INFO L175 Difference]: Start difference. First operand has 362 places, 592 transitions, 11651 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:19:20,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 622 transitions, 13195 flow [2024-06-14 13:19:22,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 622 transitions, 12576 flow, removed 133 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:22,546 INFO L231 Difference]: Finished difference. Result has 364 places, 592 transitions, 11336 flow [2024-06-14 13:19:22,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11032, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11336, PETRI_PLACES=364, PETRI_TRANSITIONS=592} [2024-06-14 13:19:22,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 13:19:22,547 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 592 transitions, 11336 flow [2024-06-14 13:19:22,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:22,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:22,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:22,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:19:22,548 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:22,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash -865572182, now seen corresponding path program 11 times [2024-06-14 13:19:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299301823] [2024-06-14 13:19:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299301823] [2024-06-14 13:19:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299301823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:25,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464745472] [2024-06-14 13:19:25,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:25,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:25,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 592 transitions, 11336 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:27,701 INFO L124 PetriNetUnfolderBase]: 3198/5160 cut-off events. [2024-06-14 13:19:27,701 INFO L125 PetriNetUnfolderBase]: For 675179/675185 co-relation queries the response was YES. [2024-06-14 13:19:27,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49960 conditions, 5160 events. 3198/5160 cut-off events. For 675179/675185 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31410 event pairs, 562 based on Foata normal form. 3/5155 useless extension candidates. Maximal degree in co-relation 49790. Up to 4295 conditions per place. [2024-06-14 13:19:27,774 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 438 selfloop transitions, 185 changer transitions 0/628 dead transitions. [2024-06-14 13:19:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 628 transitions, 13160 flow [2024-06-14 13:19:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:19:27,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:19:27,776 INFO L175 Difference]: Start difference. First operand has 364 places, 592 transitions, 11336 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:19:27,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 628 transitions, 13160 flow [2024-06-14 13:19:29,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 628 transitions, 12800 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:29,666 INFO L231 Difference]: Finished difference. Result has 366 places, 595 transitions, 11543 flow [2024-06-14 13:19:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10976, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11543, PETRI_PLACES=366, PETRI_TRANSITIONS=595} [2024-06-14 13:19:29,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:19:29,667 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 595 transitions, 11543 flow [2024-06-14 13:19:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:29,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:29,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:19:29,667 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 165197778, now seen corresponding path program 13 times [2024-06-14 13:19:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522717316] [2024-06-14 13:19:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522717316] [2024-06-14 13:19:32,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522717316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:32,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:32,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:32,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506235606] [2024-06-14 13:19:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 595 transitions, 11543 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:32,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:34,798 INFO L124 PetriNetUnfolderBase]: 3195/5157 cut-off events. [2024-06-14 13:19:34,799 INFO L125 PetriNetUnfolderBase]: For 684386/684386 co-relation queries the response was YES. [2024-06-14 13:19:34,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50378 conditions, 5157 events. 3195/5157 cut-off events. For 684386/684386 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31474 event pairs, 551 based on Foata normal form. 1/5157 useless extension candidates. Maximal degree in co-relation 50206. Up to 4464 conditions per place. [2024-06-14 13:19:34,875 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 149 changer transitions 0/630 dead transitions. [2024-06-14 13:19:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 630 transitions, 12932 flow [2024-06-14 13:19:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:19:34,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:19:34,877 INFO L175 Difference]: Start difference. First operand has 366 places, 595 transitions, 11543 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:19:34,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 630 transitions, 12932 flow [2024-06-14 13:19:36,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 630 transitions, 12536 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:36,888 INFO L231 Difference]: Finished difference. Result has 366 places, 595 transitions, 11505 flow [2024-06-14 13:19:36,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11147, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11505, PETRI_PLACES=366, PETRI_TRANSITIONS=595} [2024-06-14 13:19:36,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:19:36,889 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 595 transitions, 11505 flow [2024-06-14 13:19:36,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:36,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:36,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:19:36,889 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1879491164, now seen corresponding path program 11 times [2024-06-14 13:19:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:36,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765574932] [2024-06-14 13:19:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:40,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:40,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765574932] [2024-06-14 13:19:40,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765574932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:40,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:40,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596428905] [2024-06-14 13:19:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:40,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:40,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:40,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 595 transitions, 11505 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:40,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:40,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:40,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:42,443 INFO L124 PetriNetUnfolderBase]: 3291/5301 cut-off events. [2024-06-14 13:19:42,443 INFO L125 PetriNetUnfolderBase]: For 718717/718717 co-relation queries the response was YES. [2024-06-14 13:19:42,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51966 conditions, 5301 events. 3291/5301 cut-off events. For 718717/718717 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32496 event pairs, 535 based on Foata normal form. 4/5304 useless extension candidates. Maximal degree in co-relation 51793. Up to 4320 conditions per place. [2024-06-14 13:19:42,521 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 429 selfloop transitions, 237 changer transitions 0/671 dead transitions. [2024-06-14 13:19:42,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 671 transitions, 14012 flow [2024-06-14 13:19:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 13:19:42,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-14 13:19:42,523 INFO L175 Difference]: Start difference. First operand has 366 places, 595 transitions, 11505 flow. Second operand 11 states and 196 transitions. [2024-06-14 13:19:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 671 transitions, 14012 flow [2024-06-14 13:19:44,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 671 transitions, 13457 flow, removed 55 selfloop flow, removed 11 redundant places. [2024-06-14 13:19:44,504 INFO L231 Difference]: Finished difference. Result has 368 places, 627 transitions, 12278 flow [2024-06-14 13:19:44,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10962, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12278, PETRI_PLACES=368, PETRI_TRANSITIONS=627} [2024-06-14 13:19:44,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 13:19:44,506 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 627 transitions, 12278 flow [2024-06-14 13:19:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:44,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:44,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:44,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:19:44,507 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:44,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1709025884, now seen corresponding path program 12 times [2024-06-14 13:19:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:44,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966192557] [2024-06-14 13:19:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:47,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966192557] [2024-06-14 13:19:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966192557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:47,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:47,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110257372] [2024-06-14 13:19:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:47,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:47,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:47,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 627 transitions, 12278 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:49,921 INFO L124 PetriNetUnfolderBase]: 3279/5286 cut-off events. [2024-06-14 13:19:49,921 INFO L125 PetriNetUnfolderBase]: For 673085/673085 co-relation queries the response was YES. [2024-06-14 13:19:49,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51419 conditions, 5286 events. 3279/5286 cut-off events. For 673085/673085 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32423 event pairs, 546 based on Foata normal form. 4/5289 useless extension candidates. Maximal degree in co-relation 51246. Up to 4314 conditions per place. [2024-06-14 13:19:49,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 441 selfloop transitions, 215 changer transitions 0/661 dead transitions. [2024-06-14 13:19:49,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 661 transitions, 13890 flow [2024-06-14 13:19:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:19:50,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:19:50,002 INFO L175 Difference]: Start difference. First operand has 368 places, 627 transitions, 12278 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:19:50,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 661 transitions, 13890 flow [2024-06-14 13:19:51,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 661 transitions, 13395 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-14 13:19:51,926 INFO L231 Difference]: Finished difference. Result has 368 places, 627 transitions, 12247 flow [2024-06-14 13:19:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12247, PETRI_PLACES=368, PETRI_TRANSITIONS=627} [2024-06-14 13:19:51,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 13:19:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 627 transitions, 12247 flow [2024-06-14 13:19:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:51,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:51,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:19:51,927 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:51,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1708788362, now seen corresponding path program 12 times [2024-06-14 13:19:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510542939] [2024-06-14 13:19:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510542939] [2024-06-14 13:19:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510542939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205108389] [2024-06-14 13:19:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:55,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:55,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 627 transitions, 12247 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:55,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:55,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:55,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:57,470 INFO L124 PetriNetUnfolderBase]: 3276/5293 cut-off events. [2024-06-14 13:19:57,470 INFO L125 PetriNetUnfolderBase]: For 670160/670160 co-relation queries the response was YES. [2024-06-14 13:19:57,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51306 conditions, 5293 events. 3276/5293 cut-off events. For 670160/670160 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32524 event pairs, 561 based on Foata normal form. 1/5293 useless extension candidates. Maximal degree in co-relation 51132. Up to 4409 conditions per place. [2024-06-14 13:19:57,551 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 477 selfloop transitions, 186 changer transitions 0/668 dead transitions. [2024-06-14 13:19:57,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 668 transitions, 13914 flow [2024-06-14 13:19:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:19:57,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:19:57,553 INFO L175 Difference]: Start difference. First operand has 368 places, 627 transitions, 12247 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:19:57,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 668 transitions, 13914 flow [2024-06-14 13:19:59,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 668 transitions, 13474 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:59,788 INFO L231 Difference]: Finished difference. Result has 370 places, 627 transitions, 12203 flow [2024-06-14 13:19:59,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12203, PETRI_PLACES=370, PETRI_TRANSITIONS=627} [2024-06-14 13:19:59,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 13:19:59,788 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 627 transitions, 12203 flow [2024-06-14 13:19:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:59,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:59,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:59,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:19:59,788 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:59,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2108532122, now seen corresponding path program 3 times [2024-06-14 13:19:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:59,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793165885] [2024-06-14 13:19:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:03,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:03,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793165885] [2024-06-14 13:20:03,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793165885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:03,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:03,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:03,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357312318] [2024-06-14 13:20:03,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:03,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:03,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:03,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:03,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 627 transitions, 12203 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:03,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:03,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:05,209 INFO L124 PetriNetUnfolderBase]: 3136/5113 cut-off events. [2024-06-14 13:20:05,209 INFO L125 PetriNetUnfolderBase]: For 727371/727411 co-relation queries the response was YES. [2024-06-14 13:20:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50322 conditions, 5113 events. 3136/5113 cut-off events. For 727371/727411 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 31791 event pairs, 501 based on Foata normal form. 41/5121 useless extension candidates. Maximal degree in co-relation 50147. Up to 4377 conditions per place. [2024-06-14 13:20:05,291 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 488 selfloop transitions, 82 changer transitions 0/647 dead transitions. [2024-06-14 13:20:05,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 647 transitions, 13465 flow [2024-06-14 13:20:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:20:05,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:20:05,293 INFO L175 Difference]: Start difference. First operand has 370 places, 627 transitions, 12203 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:20:05,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 647 transitions, 13465 flow [2024-06-14 13:20:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 647 transitions, 13109 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:07,429 INFO L231 Difference]: Finished difference. Result has 369 places, 628 transitions, 12037 flow [2024-06-14 13:20:07,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11847, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12037, PETRI_PLACES=369, PETRI_TRANSITIONS=628} [2024-06-14 13:20:07,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-14 13:20:07,429 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 628 transitions, 12037 flow [2024-06-14 13:20:07,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:07,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:07,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:20:07,430 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:07,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1709034812, now seen corresponding path program 4 times [2024-06-14 13:20:07,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:07,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931811285] [2024-06-14 13:20:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:07,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:11,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931811285] [2024-06-14 13:20:11,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931811285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:11,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:11,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:11,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451333916] [2024-06-14 13:20:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:11,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:11,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:11,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:11,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 628 transitions, 12037 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:11,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:11,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:11,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:12,901 INFO L124 PetriNetUnfolderBase]: 3175/5185 cut-off events. [2024-06-14 13:20:12,901 INFO L125 PetriNetUnfolderBase]: For 720741/720787 co-relation queries the response was YES. [2024-06-14 13:20:12,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50341 conditions, 5185 events. 3175/5185 cut-off events. For 720741/720787 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32510 event pairs, 540 based on Foata normal form. 46/5198 useless extension candidates. Maximal degree in co-relation 50165. Up to 4337 conditions per place. [2024-06-14 13:20:12,984 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 498 selfloop transitions, 79 changer transitions 0/654 dead transitions. [2024-06-14 13:20:12,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 654 transitions, 13333 flow [2024-06-14 13:20:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:20:12,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:20:12,986 INFO L175 Difference]: Start difference. First operand has 369 places, 628 transitions, 12037 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:20:12,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 654 transitions, 13333 flow [2024-06-14 13:20:15,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 654 transitions, 13165 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:15,247 INFO L231 Difference]: Finished difference. Result has 371 places, 629 transitions, 12075 flow [2024-06-14 13:20:15,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11869, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12075, PETRI_PLACES=371, PETRI_TRANSITIONS=629} [2024-06-14 13:20:15,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 13:20:15,248 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 629 transitions, 12075 flow [2024-06-14 13:20:15,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:15,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:15,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:15,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:20:15,249 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:15,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1426721210, now seen corresponding path program 5 times [2024-06-14 13:20:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:15,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257969891] [2024-06-14 13:20:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257969891] [2024-06-14 13:20:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257969891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:18,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026912785] [2024-06-14 13:20:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:18,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:18,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 629 transitions, 12075 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 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) [2024-06-14 13:20:18,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:18,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:18,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:20,394 INFO L124 PetriNetUnfolderBase]: 3179/5194 cut-off events. [2024-06-14 13:20:20,394 INFO L125 PetriNetUnfolderBase]: For 691874/691916 co-relation queries the response was YES. [2024-06-14 13:20:20,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50106 conditions, 5194 events. 3179/5194 cut-off events. For 691874/691916 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32479 event pairs, 499 based on Foata normal form. 37/5194 useless extension candidates. Maximal degree in co-relation 49929. Up to 4246 conditions per place. [2024-06-14 13:20:20,479 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 487 selfloop transitions, 87 changer transitions 0/651 dead transitions. [2024-06-14 13:20:20,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 651 transitions, 13373 flow [2024-06-14 13:20:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:20:20,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:20:20,480 INFO L175 Difference]: Start difference. First operand has 371 places, 629 transitions, 12075 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:20:20,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 651 transitions, 13373 flow [2024-06-14 13:20:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 651 transitions, 13225 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:22,423 INFO L231 Difference]: Finished difference. Result has 373 places, 630 transitions, 12129 flow [2024-06-14 13:20:22,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11929, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12129, PETRI_PLACES=373, PETRI_TRANSITIONS=630} [2024-06-14 13:20:22,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:20:22,424 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 630 transitions, 12129 flow [2024-06-14 13:20:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 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) [2024-06-14 13:20:22,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:22,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:22,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:20:22,424 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 128298420, now seen corresponding path program 1 times [2024-06-14 13:20:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:22,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103802614] [2024-06-14 13:20:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:22,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103802614] [2024-06-14 13:20:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103802614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989727238] [2024-06-14 13:20:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:24,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:24,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 630 transitions, 12129 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:24,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:24,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:24,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:26,309 INFO L124 PetriNetUnfolderBase]: 3374/5455 cut-off events. [2024-06-14 13:20:26,309 INFO L125 PetriNetUnfolderBase]: For 678026/678029 co-relation queries the response was YES. [2024-06-14 13:20:26,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51782 conditions, 5455 events. 3374/5455 cut-off events. For 678026/678029 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33830 event pairs, 1049 based on Foata normal form. 4/5457 useless extension candidates. Maximal degree in co-relation 51604. Up to 5020 conditions per place. [2024-06-14 13:20:26,399 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 620 selfloop transitions, 31 changer transitions 0/656 dead transitions. [2024-06-14 13:20:26,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 656 transitions, 13745 flow [2024-06-14 13:20:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:20:26,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:20:26,400 INFO L175 Difference]: Start difference. First operand has 373 places, 630 transitions, 12129 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:20:26,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 656 transitions, 13745 flow [2024-06-14 13:20:28,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 656 transitions, 13561 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:28,475 INFO L231 Difference]: Finished difference. Result has 375 places, 634 transitions, 12080 flow [2024-06-14 13:20:28,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11945, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12080, PETRI_PLACES=375, PETRI_TRANSITIONS=634} [2024-06-14 13:20:28,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 13:20:28,475 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 634 transitions, 12080 flow [2024-06-14 13:20:28,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:28,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:28,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:28,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:20:28,476 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:28,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash 100660704, now seen corresponding path program 2 times [2024-06-14 13:20:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509923797] [2024-06-14 13:20:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:30,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509923797] [2024-06-14 13:20:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509923797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191599366] [2024-06-14 13:20:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:30,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:30,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:30,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:30,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 634 transitions, 12080 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:30,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:30,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:30,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:32,536 INFO L124 PetriNetUnfolderBase]: 3382/5467 cut-off events. [2024-06-14 13:20:32,537 INFO L125 PetriNetUnfolderBase]: For 687610/687613 co-relation queries the response was YES. [2024-06-14 13:20:32,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51749 conditions, 5467 events. 3382/5467 cut-off events. For 687610/687613 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33973 event pairs, 1089 based on Foata normal form. 4/5469 useless extension candidates. Maximal degree in co-relation 51570. Up to 5069 conditions per place. [2024-06-14 13:20:32,620 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 619 selfloop transitions, 28 changer transitions 0/652 dead transitions. [2024-06-14 13:20:32,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 652 transitions, 13456 flow [2024-06-14 13:20:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:20:32,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 13:20:32,621 INFO L175 Difference]: Start difference. First operand has 375 places, 634 transitions, 12080 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:20:32,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 652 transitions, 13456 flow [2024-06-14 13:20:34,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 652 transitions, 13371 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:34,963 INFO L231 Difference]: Finished difference. Result has 379 places, 636 transitions, 12096 flow [2024-06-14 13:20:34,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12009, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12096, PETRI_PLACES=379, PETRI_TRANSITIONS=636} [2024-06-14 13:20:34,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 13:20:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 636 transitions, 12096 flow [2024-06-14 13:20:34,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:34,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:34,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:20:34,964 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:34,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 184678368, now seen corresponding path program 3 times [2024-06-14 13:20:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842175432] [2024-06-14 13:20:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:34,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842175432] [2024-06-14 13:20:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842175432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:37,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:37,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:37,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490893524] [2024-06-14 13:20:37,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:37,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:37,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:37,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 636 transitions, 12096 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:37,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:37,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:37,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,607 INFO L124 PetriNetUnfolderBase]: 3390/5474 cut-off events. [2024-06-14 13:20:39,607 INFO L125 PetriNetUnfolderBase]: For 700185/700185 co-relation queries the response was YES. [2024-06-14 13:20:39,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51908 conditions, 5474 events. 3390/5474 cut-off events. For 700185/700185 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33930 event pairs, 1089 based on Foata normal form. 2/5473 useless extension candidates. Maximal degree in co-relation 51727. Up to 5081 conditions per place. [2024-06-14 13:20:39,695 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 620 selfloop transitions, 30 changer transitions 0/655 dead transitions. [2024-06-14 13:20:39,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 655 transitions, 13470 flow [2024-06-14 13:20:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:20:39,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:20:39,696 INFO L175 Difference]: Start difference. First operand has 379 places, 636 transitions, 12096 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:20:39,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 655 transitions, 13470 flow [2024-06-14 13:20:42,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 655 transitions, 13403 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:42,577 INFO L231 Difference]: Finished difference. Result has 382 places, 638 transitions, 12124 flow [2024-06-14 13:20:42,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12029, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12124, PETRI_PLACES=382, PETRI_TRANSITIONS=638} [2024-06-14 13:20:42,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-14 13:20:42,578 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 638 transitions, 12124 flow [2024-06-14 13:20:42,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:42,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:42,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:20:42,578 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:42,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 246631248, now seen corresponding path program 1 times [2024-06-14 13:20:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925551804] [2024-06-14 13:20:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925551804] [2024-06-14 13:20:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925551804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:45,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:45,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022356648] [2024-06-14 13:20:45,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:45,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:45,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:45,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 638 transitions, 12124 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:20:45,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:45,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:45,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:47,775 INFO L124 PetriNetUnfolderBase]: 3398/5474 cut-off events. [2024-06-14 13:20:47,775 INFO L125 PetriNetUnfolderBase]: For 715767/715767 co-relation queries the response was YES. [2024-06-14 13:20:47,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52191 conditions, 5474 events. 3398/5474 cut-off events. For 715767/715767 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33826 event pairs, 1067 based on Foata normal form. 2/5473 useless extension candidates. Maximal degree in co-relation 52009. Up to 5029 conditions per place. [2024-06-14 13:20:47,862 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 603 selfloop transitions, 52 changer transitions 0/660 dead transitions. [2024-06-14 13:20:47,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 660 transitions, 13566 flow [2024-06-14 13:20:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:20:47,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:20:47,863 INFO L175 Difference]: Start difference. First operand has 382 places, 638 transitions, 12124 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:20:47,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 660 transitions, 13566 flow [2024-06-14 13:20:50,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 660 transitions, 13491 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:50,697 INFO L231 Difference]: Finished difference. Result has 384 places, 640 transitions, 12234 flow [2024-06-14 13:20:50,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12049, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12234, PETRI_PLACES=384, PETRI_TRANSITIONS=640} [2024-06-14 13:20:50,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 13:20:50,697 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 640 transitions, 12234 flow [2024-06-14 13:20:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:20:50,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:50,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:20:50,698 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:50,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash -557393002, now seen corresponding path program 4 times [2024-06-14 13:20:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:50,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864577181] [2024-06-14 13:20:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:52,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:52,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864577181] [2024-06-14 13:20:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864577181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:52,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:52,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:52,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710247270] [2024-06-14 13:20:52,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:52,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:52,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:52,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:52,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:52,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:52,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 640 transitions, 12234 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:52,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:52,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:54,708 INFO L124 PetriNetUnfolderBase]: 3393/5487 cut-off events. [2024-06-14 13:20:54,709 INFO L125 PetriNetUnfolderBase]: For 719199/719199 co-relation queries the response was YES. [2024-06-14 13:20:54,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52254 conditions, 5487 events. 3393/5487 cut-off events. For 719199/719199 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34018 event pairs, 1043 based on Foata normal form. 2/5488 useless extension candidates. Maximal degree in co-relation 52071. Up to 5073 conditions per place. [2024-06-14 13:20:54,787 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 635 selfloop transitions, 24 changer transitions 0/664 dead transitions. [2024-06-14 13:20:54,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 664 transitions, 13626 flow [2024-06-14 13:20:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:20:54,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:20:54,788 INFO L175 Difference]: Start difference. First operand has 384 places, 640 transitions, 12234 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:20:54,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 664 transitions, 13626 flow [2024-06-14 13:20:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 664 transitions, 13445 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:57,563 INFO L231 Difference]: Finished difference. Result has 385 places, 640 transitions, 12109 flow [2024-06-14 13:20:57,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12053, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12109, PETRI_PLACES=385, PETRI_TRANSITIONS=640} [2024-06-14 13:20:57,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 13:20:57,564 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 640 transitions, 12109 flow [2024-06-14 13:20:57,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:57,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:57,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:20:57,565 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:57,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2114251994, now seen corresponding path program 2 times [2024-06-14 13:20:57,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:57,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225743569] [2024-06-14 13:20:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225743569] [2024-06-14 13:21:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225743569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:00,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:00,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:00,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292603273] [2024-06-14 13:21:00,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:00,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:00,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:00,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:00,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 640 transitions, 12109 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:00,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:00,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:02,652 INFO L124 PetriNetUnfolderBase]: 3401/5497 cut-off events. [2024-06-14 13:21:02,652 INFO L125 PetriNetUnfolderBase]: For 732205/732205 co-relation queries the response was YES. [2024-06-14 13:21:02,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52337 conditions, 5497 events. 3401/5497 cut-off events. For 732205/732205 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34167 event pairs, 1057 based on Foata normal form. 2/5498 useless extension candidates. Maximal degree in co-relation 52153. Up to 5069 conditions per place. [2024-06-14 13:21:02,742 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 624 selfloop transitions, 34 changer transitions 0/663 dead transitions. [2024-06-14 13:21:02,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 663 transitions, 13563 flow [2024-06-14 13:21:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:21:02,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 13:21:02,743 INFO L175 Difference]: Start difference. First operand has 385 places, 640 transitions, 12109 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:21:02,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 663 transitions, 13563 flow [2024-06-14 13:21:05,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 663 transitions, 13501 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:05,976 INFO L231 Difference]: Finished difference. Result has 388 places, 642 transitions, 12200 flow [2024-06-14 13:21:05,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12047, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12200, PETRI_PLACES=388, PETRI_TRANSITIONS=642} [2024-06-14 13:21:05,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-14 13:21:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 642 transitions, 12200 flow [2024-06-14 13:21:05,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:05,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:05,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:21:05,977 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:05,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -550713184, now seen corresponding path program 3 times [2024-06-14 13:21:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:05,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807969148] [2024-06-14 13:21:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:09,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:09,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807969148] [2024-06-14 13:21:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807969148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670180032] [2024-06-14 13:21:09,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:09,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:09,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:09,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 642 transitions, 12200 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:09,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:09,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:09,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:11,431 INFO L124 PetriNetUnfolderBase]: 3468/5588 cut-off events. [2024-06-14 13:21:11,431 INFO L125 PetriNetUnfolderBase]: For 797983/797983 co-relation queries the response was YES. [2024-06-14 13:21:11,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54304 conditions, 5588 events. 3468/5588 cut-off events. For 797983/797983 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34580 event pairs, 1061 based on Foata normal form. 2/5589 useless extension candidates. Maximal degree in co-relation 54119. Up to 5062 conditions per place. [2024-06-14 13:21:11,525 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 630 selfloop transitions, 37 changer transitions 0/672 dead transitions. [2024-06-14 13:21:11,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 672 transitions, 14006 flow [2024-06-14 13:21:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:21:11,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:21:11,526 INFO L175 Difference]: Start difference. First operand has 388 places, 642 transitions, 12200 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:21:11,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 672 transitions, 14006 flow [2024-06-14 13:21:14,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 672 transitions, 13869 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:14,916 INFO L231 Difference]: Finished difference. Result has 390 places, 645 transitions, 12246 flow [2024-06-14 13:21:14,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12063, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12246, PETRI_PLACES=390, PETRI_TRANSITIONS=645} [2024-06-14 13:21:14,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:21:14,917 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 645 transitions, 12246 flow [2024-06-14 13:21:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:14,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:14,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:21:14,917 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:14,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1886350844, now seen corresponding path program 4 times [2024-06-14 13:21:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:14,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013630147] [2024-06-14 13:21:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013630147] [2024-06-14 13:21:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013630147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:17,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013046049] [2024-06-14 13:21:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:17,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:18,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:18,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 645 transitions, 12246 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:18,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:18,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:18,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:20,090 INFO L124 PetriNetUnfolderBase]: 3463/5587 cut-off events. [2024-06-14 13:21:20,090 INFO L125 PetriNetUnfolderBase]: For 801297/801297 co-relation queries the response was YES. [2024-06-14 13:21:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 5587 events. 3463/5587 cut-off events. For 801297/801297 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34666 event pairs, 1071 based on Foata normal form. 2/5588 useless extension candidates. Maximal degree in co-relation 53965. Up to 5163 conditions per place. [2024-06-14 13:21:20,175 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 632 selfloop transitions, 35 changer transitions 0/672 dead transitions. [2024-06-14 13:21:20,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 672 transitions, 13742 flow [2024-06-14 13:21:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:21:20,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:21:20,176 INFO L175 Difference]: Start difference. First operand has 390 places, 645 transitions, 12246 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:21:20,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 672 transitions, 13742 flow [2024-06-14 13:21:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 672 transitions, 13624 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:23,497 INFO L231 Difference]: Finished difference. Result has 393 places, 647 transitions, 12291 flow [2024-06-14 13:21:23,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12291, PETRI_PLACES=393, PETRI_TRANSITIONS=647} [2024-06-14 13:21:23,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 13:21:23,498 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 647 transitions, 12291 flow [2024-06-14 13:21:23,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:21:23,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:23,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:23,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:21:23,498 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:23,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:23,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1807816045, now seen corresponding path program 1 times [2024-06-14 13:21:23,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:23,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126294458] [2024-06-14 13:21:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:25,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:25,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126294458] [2024-06-14 13:21:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126294458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:25,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781362237] [2024-06-14 13:21:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:25,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:25,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:21:25,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 647 transitions, 12291 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:25,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:25,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:21:25,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:28,039 INFO L124 PetriNetUnfolderBase]: 3382/5517 cut-off events. [2024-06-14 13:21:28,040 INFO L125 PetriNetUnfolderBase]: For 882103/882149 co-relation queries the response was YES. [2024-06-14 13:21:28,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54505 conditions, 5517 events. 3382/5517 cut-off events. For 882103/882149 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34899 event pairs, 591 based on Foata normal form. 42/5528 useless extension candidates. Maximal degree in co-relation 54317. Up to 4624 conditions per place. [2024-06-14 13:21:28,133 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 87 changer transitions 0/700 dead transitions. [2024-06-14 13:21:28,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 700 transitions, 14027 flow [2024-06-14 13:21:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:21:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:21:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-14 13:21:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-14 13:21:28,134 INFO L175 Difference]: Start difference. First operand has 393 places, 647 transitions, 12291 flow. Second operand 11 states and 199 transitions. [2024-06-14 13:21:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 700 transitions, 14027 flow [2024-06-14 13:21:31,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 700 transitions, 13884 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:31,479 INFO L231 Difference]: Finished difference. Result has 400 places, 653 transitions, 12436 flow [2024-06-14 13:21:31,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12148, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12436, PETRI_PLACES=400, PETRI_TRANSITIONS=653} [2024-06-14 13:21:31,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 13:21:31,480 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 653 transitions, 12436 flow [2024-06-14 13:21:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:21:31,480 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 703717853, now seen corresponding path program 2 times [2024-06-14 13:21:31,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:31,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52107884] [2024-06-14 13:21:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52107884] [2024-06-14 13:21:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52107884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:33,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:33,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564058355] [2024-06-14 13:21:33,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:33,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:33,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:33,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:33,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:21:33,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 653 transitions, 12436 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:33,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:33,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:21:33,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:36,240 INFO L124 PetriNetUnfolderBase]: 3364/5487 cut-off events. [2024-06-14 13:21:36,240 INFO L125 PetriNetUnfolderBase]: For 854501/854547 co-relation queries the response was YES. [2024-06-14 13:21:36,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53849 conditions, 5487 events. 3364/5487 cut-off events. For 854501/854547 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34568 event pairs, 585 based on Foata normal form. 42/5498 useless extension candidates. Maximal degree in co-relation 53658. Up to 4697 conditions per place. [2024-06-14 13:21:36,332 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 530 selfloop transitions, 86 changer transitions 0/693 dead transitions. [2024-06-14 13:21:36,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 693 transitions, 13863 flow [2024-06-14 13:21:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:21:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:21:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-14 13:21:36,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-14 13:21:36,333 INFO L175 Difference]: Start difference. First operand has 400 places, 653 transitions, 12436 flow. Second operand 11 states and 190 transitions. [2024-06-14 13:21:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 693 transitions, 13863 flow [2024-06-14 13:21:39,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 693 transitions, 13731 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:39,933 INFO L231 Difference]: Finished difference. Result has 406 places, 655 transitions, 12516 flow [2024-06-14 13:21:39,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12304, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12516, PETRI_PLACES=406, PETRI_TRANSITIONS=655} [2024-06-14 13:21:39,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:21:39,934 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 655 transitions, 12516 flow [2024-06-14 13:21:39,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:39,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:39,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:39,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:21:39,934 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:39,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash 397094825, now seen corresponding path program 3 times [2024-06-14 13:21:39,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:39,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505186753] [2024-06-14 13:21:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:42,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:42,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505186753] [2024-06-14 13:21:42,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505186753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:42,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:42,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:42,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570224279] [2024-06-14 13:21:42,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:21:42,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 655 transitions, 12516 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:42,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:42,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:21:42,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:44,412 INFO L124 PetriNetUnfolderBase]: 3477/5658 cut-off events. [2024-06-14 13:21:44,412 INFO L125 PetriNetUnfolderBase]: For 878563/878609 co-relation queries the response was YES. [2024-06-14 13:21:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55092 conditions, 5658 events. 3477/5658 cut-off events. For 878563/878609 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 35596 event pairs, 481 based on Foata normal form. 42/5668 useless extension candidates. Maximal degree in co-relation 54898. Up to 4471 conditions per place. [2024-06-14 13:21:44,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 534 selfloop transitions, 99 changer transitions 0/710 dead transitions. [2024-06-14 13:21:44,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 710 transitions, 14307 flow [2024-06-14 13:21:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 13:21:44,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:21:44,504 INFO L175 Difference]: Start difference. First operand has 406 places, 655 transitions, 12516 flow. Second operand 10 states and 182 transitions. [2024-06-14 13:21:44,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 710 transitions, 14307 flow [2024-06-14 13:21:47,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 710 transitions, 14144 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:47,781 INFO L231 Difference]: Finished difference. Result has 411 places, 666 transitions, 12747 flow [2024-06-14 13:21:47,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12353, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12747, PETRI_PLACES=411, PETRI_TRANSITIONS=666} [2024-06-14 13:21:47,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 13:21:47,781 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 666 transitions, 12747 flow [2024-06-14 13:21:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-14 13:21:47,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:47,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:47,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:21:47,781 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:47,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 557831939, now seen corresponding path program 1 times [2024-06-14 13:21:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106720956] [2024-06-14 13:21:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:50,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:50,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106720956] [2024-06-14 13:21:50,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106720956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:50,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:50,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582242531] [2024-06-14 13:21:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:50,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:50,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:50,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:50,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 666 transitions, 12747 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-14 13:21:50,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:50,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:50,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:53,014 INFO L124 PetriNetUnfolderBase]: 3806/6138 cut-off events. [2024-06-14 13:21:53,014 INFO L125 PetriNetUnfolderBase]: For 901445/901469 co-relation queries the response was YES. [2024-06-14 13:21:53,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59924 conditions, 6138 events. 3806/6138 cut-off events. For 901445/901469 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38528 event pairs, 695 based on Foata normal form. 27/6161 useless extension candidates. Maximal degree in co-relation 59726. Up to 4950 conditions per place. [2024-06-14 13:21:53,106 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 470 selfloop transitions, 298 changer transitions 0/773 dead transitions. [2024-06-14 13:21:53,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 773 transitions, 16574 flow [2024-06-14 13:21:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:21:53,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 13:21:53,107 INFO L175 Difference]: Start difference. First operand has 411 places, 666 transitions, 12747 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:21:53,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 773 transitions, 16574 flow [2024-06-14 13:21:56,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 773 transitions, 16392 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:56,324 INFO L231 Difference]: Finished difference. Result has 416 places, 726 transitions, 14829 flow [2024-06-14 13:21:56,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12565, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14829, PETRI_PLACES=416, PETRI_TRANSITIONS=726} [2024-06-14 13:21:56,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:21:56,325 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 726 transitions, 14829 flow [2024-06-14 13:21:56,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-14 13:21:56,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:56,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:56,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:21:56,326 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:56,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1773935519, now seen corresponding path program 2 times [2024-06-14 13:21:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344833255] [2024-06-14 13:21:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344833255] [2024-06-14 13:21:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344833255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:58,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843781170] [2024-06-14 13:21:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:58,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:58,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 726 transitions, 14829 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:58,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:58,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:58,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:02,491 INFO L124 PetriNetUnfolderBase]: 4017/6433 cut-off events. [2024-06-14 13:22:02,491 INFO L125 PetriNetUnfolderBase]: For 1037978/1037986 co-relation queries the response was YES. [2024-06-14 13:22:02,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65831 conditions, 6433 events. 4017/6433 cut-off events. For 1037978/1037986 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40280 event pairs, 685 based on Foata normal form. 19/6445 useless extension candidates. Maximal degree in co-relation 65630. Up to 4452 conditions per place. [2024-06-14 13:22:02,605 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 378 selfloop transitions, 460 changer transitions 0/843 dead transitions. [2024-06-14 13:22:02,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 843 transitions, 19113 flow [2024-06-14 13:22:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:22:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:22:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 245 transitions. [2024-06-14 13:22:02,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:22:02,606 INFO L175 Difference]: Start difference. First operand has 416 places, 726 transitions, 14829 flow. Second operand 14 states and 245 transitions. [2024-06-14 13:22:02,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 843 transitions, 19113 flow [2024-06-14 13:22:07,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 843 transitions, 18666 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:07,430 INFO L231 Difference]: Finished difference. Result has 431 places, 778 transitions, 16657 flow [2024-06-14 13:22:07,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14406, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16657, PETRI_PLACES=431, PETRI_TRANSITIONS=778} [2024-06-14 13:22:07,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:22:07,430 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 778 transitions, 16657 flow [2024-06-14 13:22:07,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:07,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:07,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:22:07,430 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:07,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1135345539, now seen corresponding path program 3 times [2024-06-14 13:22:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:07,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610292758] [2024-06-14 13:22:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:10,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:10,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610292758] [2024-06-14 13:22:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610292758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:10,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340540894] [2024-06-14 13:22:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:10,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:11,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:11,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 778 transitions, 16657 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:22:11,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:11,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:11,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:14,123 INFO L124 PetriNetUnfolderBase]: 4039/6500 cut-off events. [2024-06-14 13:22:14,124 INFO L125 PetriNetUnfolderBase]: For 1071147/1071155 co-relation queries the response was YES. [2024-06-14 13:22:14,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67757 conditions, 6500 events. 4039/6500 cut-off events. For 1071147/1071155 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 41102 event pairs, 676 based on Foata normal form. 14/6513 useless extension candidates. Maximal degree in co-relation 67551. Up to 5682 conditions per place. [2024-06-14 13:22:14,224 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 671 selfloop transitions, 173 changer transitions 0/849 dead transitions. [2024-06-14 13:22:14,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 849 transitions, 19230 flow [2024-06-14 13:22:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:22:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:22:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 228 transitions. [2024-06-14 13:22:14,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407871198568873 [2024-06-14 13:22:14,225 INFO L175 Difference]: Start difference. First operand has 431 places, 778 transitions, 16657 flow. Second operand 13 states and 228 transitions. [2024-06-14 13:22:14,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 849 transitions, 19230 flow [2024-06-14 13:22:19,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 849 transitions, 18717 flow, removed 225 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:19,564 INFO L231 Difference]: Finished difference. Result has 439 places, 786 transitions, 16681 flow [2024-06-14 13:22:19,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16178, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16681, PETRI_PLACES=439, PETRI_TRANSITIONS=786} [2024-06-14 13:22:19,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 13:22:19,564 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 786 transitions, 16681 flow [2024-06-14 13:22:19,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:22:19,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:19,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:19,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:22:19,565 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:19,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1942111375, now seen corresponding path program 4 times [2024-06-14 13:22:19,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:19,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6631765] [2024-06-14 13:22:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:19,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6631765] [2024-06-14 13:22:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6631765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:22,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635179100] [2024-06-14 13:22:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:22,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:22,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 786 transitions, 16681 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:22:22,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:22,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:22,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:25,775 INFO L124 PetriNetUnfolderBase]: 4021/6476 cut-off events. [2024-06-14 13:22:25,775 INFO L125 PetriNetUnfolderBase]: For 1031463/1031471 co-relation queries the response was YES. [2024-06-14 13:22:25,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66513 conditions, 6476 events. 4021/6476 cut-off events. For 1031463/1031471 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40946 event pairs, 680 based on Foata normal form. 14/6489 useless extension candidates. Maximal degree in co-relation 66306. Up to 5668 conditions per place. [2024-06-14 13:22:25,894 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 672 selfloop transitions, 173 changer transitions 0/850 dead transitions. [2024-06-14 13:22:25,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 850 transitions, 18871 flow [2024-06-14 13:22:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:22:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:22:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 241 transitions. [2024-06-14 13:22:25,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003322259136213 [2024-06-14 13:22:25,895 INFO L175 Difference]: Start difference. First operand has 439 places, 786 transitions, 16681 flow. Second operand 14 states and 241 transitions. [2024-06-14 13:22:25,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 850 transitions, 18871 flow [2024-06-14 13:22:30,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 850 transitions, 18445 flow, removed 42 selfloop flow, removed 11 redundant places. [2024-06-14 13:22:30,803 INFO L231 Difference]: Finished difference. Result has 442 places, 786 transitions, 16623 flow [2024-06-14 13:22:30,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16255, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16623, PETRI_PLACES=442, PETRI_TRANSITIONS=786} [2024-06-14 13:22:30,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 13:22:30,803 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 786 transitions, 16623 flow [2024-06-14 13:22:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:22:30,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:30,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:22:30,804 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:30,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1935246085, now seen corresponding path program 5 times [2024-06-14 13:22:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:30,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624755067] [2024-06-14 13:22:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624755067] [2024-06-14 13:22:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624755067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:34,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:34,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:22:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520826338] [2024-06-14 13:22:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:34,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:22:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:22:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:22:34,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:34,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 786 transitions, 16623 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:34,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:34,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:34,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:38,579 INFO L124 PetriNetUnfolderBase]: 4190/6718 cut-off events. [2024-06-14 13:22:38,580 INFO L125 PetriNetUnfolderBase]: For 1069025/1069025 co-relation queries the response was YES. [2024-06-14 13:22:38,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69182 conditions, 6718 events. 4190/6718 cut-off events. For 1069025/1069025 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 42425 event pairs, 728 based on Foata normal form. 4/6715 useless extension candidates. Maximal degree in co-relation 68974. Up to 4586 conditions per place. [2024-06-14 13:22:38,691 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 398 selfloop transitions, 512 changer transitions 0/915 dead transitions. [2024-06-14 13:22:38,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 915 transitions, 21360 flow [2024-06-14 13:22:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 13:22:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 13:22:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 277 transitions. [2024-06-14 13:22:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40261627906976744 [2024-06-14 13:22:38,693 INFO L175 Difference]: Start difference. First operand has 442 places, 786 transitions, 16623 flow. Second operand 16 states and 277 transitions. [2024-06-14 13:22:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 915 transitions, 21360 flow [2024-06-14 13:22:43,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 915 transitions, 20931 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-06-14 13:22:43,582 INFO L231 Difference]: Finished difference. Result has 448 places, 837 transitions, 18379 flow [2024-06-14 13:22:43,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16194, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18379, PETRI_PLACES=448, PETRI_TRANSITIONS=837} [2024-06-14 13:22:43,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-14 13:22:43,582 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 837 transitions, 18379 flow [2024-06-14 13:22:43,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:43,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:43,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:43,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:22:43,582 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:43,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1088054413, now seen corresponding path program 1 times [2024-06-14 13:22:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:43,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137483135] [2024-06-14 13:22:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137483135] [2024-06-14 13:22:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137483135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:45,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:45,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760654496] [2024-06-14 13:22:45,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:45,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:45,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 837 transitions, 18379 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:45,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:45,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:45,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:49,086 INFO L124 PetriNetUnfolderBase]: 4216/6800 cut-off events. [2024-06-14 13:22:49,086 INFO L125 PetriNetUnfolderBase]: For 1114652/1114676 co-relation queries the response was YES. [2024-06-14 13:22:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71491 conditions, 6800 events. 4216/6800 cut-off events. For 1114652/1114676 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 43508 event pairs, 976 based on Foata normal form. 25/6821 useless extension candidates. Maximal degree in co-relation 71279. Up to 5850 conditions per place. [2024-06-14 13:22:49,207 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 698 selfloop transitions, 186 changer transitions 0/889 dead transitions. [2024-06-14 13:22:49,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 889 transitions, 21175 flow [2024-06-14 13:22:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:22:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:22:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-14 13:22:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:22:49,208 INFO L175 Difference]: Start difference. First operand has 448 places, 837 transitions, 18379 flow. Second operand 12 states and 207 transitions. [2024-06-14 13:22:49,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 889 transitions, 21175 flow [2024-06-14 13:22:54,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 889 transitions, 20446 flow, removed 176 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:54,467 INFO L231 Difference]: Finished difference. Result has 458 places, 845 transitions, 18210 flow [2024-06-14 13:22:54,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17654, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18210, PETRI_PLACES=458, PETRI_TRANSITIONS=845} [2024-06-14 13:22:54,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 13:22:54,467 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 845 transitions, 18210 flow [2024-06-14 13:22:54,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:54,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:54,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:54,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:22:54,468 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:54,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash 650415631, now seen corresponding path program 6 times [2024-06-14 13:22:54,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:54,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855368535] [2024-06-14 13:22:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:54,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855368535] [2024-06-14 13:22:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855368535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:57,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449664913] [2024-06-14 13:22:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:57,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:57,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 845 transitions, 18210 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:57,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:57,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:57,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:59,791 INFO L124 PetriNetUnfolderBase]: 4213/6784 cut-off events. [2024-06-14 13:22:59,792 INFO L125 PetriNetUnfolderBase]: For 1112479/1112479 co-relation queries the response was YES. [2024-06-14 13:22:59,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70380 conditions, 6784 events. 4213/6784 cut-off events. For 1112479/1112479 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43159 event pairs, 756 based on Foata normal form. 1/6784 useless extension candidates. Maximal degree in co-relation 70166. Up to 6196 conditions per place. [2024-06-14 13:22:59,920 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 793 selfloop transitions, 75 changer transitions 0/873 dead transitions. [2024-06-14 13:22:59,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 873 transitions, 20262 flow [2024-06-14 13:22:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:22:59,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:22:59,921 INFO L175 Difference]: Start difference. First operand has 458 places, 845 transitions, 18210 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:22:59,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 873 transitions, 20262 flow [2024-06-14 13:23:04,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 873 transitions, 20022 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:04,745 INFO L231 Difference]: Finished difference. Result has 463 places, 845 transitions, 18126 flow [2024-06-14 13:23:04,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17970, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18126, PETRI_PLACES=463, PETRI_TRANSITIONS=845} [2024-06-14 13:23:04,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 419 predicate places. [2024-06-14 13:23:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 845 transitions, 18126 flow [2024-06-14 13:23:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:04,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:04,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:23:04,746 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:04,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1619888737, now seen corresponding path program 7 times [2024-06-14 13:23:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953487697] [2024-06-14 13:23:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:07,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953487697] [2024-06-14 13:23:07,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953487697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:07,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:07,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438336141] [2024-06-14 13:23:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:07,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:07,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:07,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:07,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 845 transitions, 18126 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:07,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:07,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:10,854 INFO L124 PetriNetUnfolderBase]: 4204/6774 cut-off events. [2024-06-14 13:23:10,855 INFO L125 PetriNetUnfolderBase]: For 1122727/1122727 co-relation queries the response was YES. [2024-06-14 13:23:10,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69801 conditions, 6774 events. 4204/6774 cut-off events. For 1122727/1122727 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43177 event pairs, 728 based on Foata normal form. 3/6776 useless extension candidates. Maximal degree in co-relation 69586. Up to 5948 conditions per place. [2024-06-14 13:23:10,995 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 720 selfloop transitions, 156 changer transitions 0/881 dead transitions. [2024-06-14 13:23:10,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 881 transitions, 20222 flow [2024-06-14 13:23:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:23:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:23:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-14 13:23:10,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828264758497317 [2024-06-14 13:23:10,996 INFO L175 Difference]: Start difference. First operand has 463 places, 845 transitions, 18126 flow. Second operand 13 states and 214 transitions. [2024-06-14 13:23:10,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 881 transitions, 20222 flow [2024-06-14 13:23:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 881 transitions, 20058 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:16,659 INFO L231 Difference]: Finished difference. Result has 470 places, 845 transitions, 18283 flow [2024-06-14 13:23:16,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17962, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18283, PETRI_PLACES=470, PETRI_TRANSITIONS=845} [2024-06-14 13:23:16,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-14 13:23:16,660 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 845 transitions, 18283 flow [2024-06-14 13:23:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:16,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:16,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:23:16,660 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:16,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash -594711861, now seen corresponding path program 4 times [2024-06-14 13:23:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519279810] [2024-06-14 13:23:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:20,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519279810] [2024-06-14 13:23:20,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519279810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:20,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:20,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562632594] [2024-06-14 13:23:20,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:20,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:20,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:20,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:20,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:20,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:20,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 845 transitions, 18283 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:20,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:20,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:20,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:23,195 INFO L124 PetriNetUnfolderBase]: 4292/6933 cut-off events. [2024-06-14 13:23:23,195 INFO L125 PetriNetUnfolderBase]: For 1186261/1186269 co-relation queries the response was YES. [2024-06-14 13:23:23,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71174 conditions, 6933 events. 4292/6933 cut-off events. For 1186261/1186269 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 44499 event pairs, 786 based on Foata normal form. 16/6948 useless extension candidates. Maximal degree in co-relation 70958. Up to 5758 conditions per place. [2024-06-14 13:23:23,324 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 781 selfloop transitions, 111 changer transitions 0/897 dead transitions. [2024-06-14 13:23:23,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 897 transitions, 20606 flow [2024-06-14 13:23:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:23:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:23:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:23:23,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:23:23,325 INFO L175 Difference]: Start difference. First operand has 470 places, 845 transitions, 18283 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:23:23,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 897 transitions, 20606 flow [2024-06-14 13:23:28,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 897 transitions, 20294 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:23:28,471 INFO L231 Difference]: Finished difference. Result has 471 places, 849 transitions, 18335 flow [2024-06-14 13:23:28,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17971, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18335, PETRI_PLACES=471, PETRI_TRANSITIONS=849} [2024-06-14 13:23:28,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-14 13:23:28,472 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 849 transitions, 18335 flow [2024-06-14 13:23:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:23:28,472 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:28,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash -329014581, now seen corresponding path program 5 times [2024-06-14 13:23:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813865368] [2024-06-14 13:23:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:32,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:32,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813865368] [2024-06-14 13:23:32,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813865368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:32,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122365606] [2024-06-14 13:23:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:32,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:32,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:32,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 849 transitions, 18335 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:32,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:32,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:32,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:34,992 INFO L124 PetriNetUnfolderBase]: 4466/7206 cut-off events. [2024-06-14 13:23:34,992 INFO L125 PetriNetUnfolderBase]: For 1210981/1210989 co-relation queries the response was YES. [2024-06-14 13:23:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73952 conditions, 7206 events. 4466/7206 cut-off events. For 1210981/1210989 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 46716 event pairs, 965 based on Foata normal form. 16/7221 useless extension candidates. Maximal degree in co-relation 73734. Up to 6362 conditions per place. [2024-06-14 13:23:35,125 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 802 selfloop transitions, 109 changer transitions 0/916 dead transitions. [2024-06-14 13:23:35,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 916 transitions, 20941 flow [2024-06-14 13:23:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:23:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:23:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-14 13:23:35,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:23:35,126 INFO L175 Difference]: Start difference. First operand has 471 places, 849 transitions, 18335 flow. Second operand 12 states and 196 transitions. [2024-06-14 13:23:35,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 916 transitions, 20941 flow [2024-06-14 13:23:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 916 transitions, 20515 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-06-14 13:23:41,140 INFO L231 Difference]: Finished difference. Result has 473 places, 871 transitions, 18734 flow [2024-06-14 13:23:41,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17938, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18734, PETRI_PLACES=473, PETRI_TRANSITIONS=871} [2024-06-14 13:23:41,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-14 13:23:41,141 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 871 transitions, 18734 flow [2024-06-14 13:23:41,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:41,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:41,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:23:41,142 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:41,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1365643177, now seen corresponding path program 8 times [2024-06-14 13:23:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811463071] [2024-06-14 13:23:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:44,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:44,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811463071] [2024-06-14 13:23:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811463071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:44,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466938144] [2024-06-14 13:23:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:44,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:44,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:44,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 871 transitions, 18734 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:44,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:44,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:44,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:47,023 INFO L124 PetriNetUnfolderBase]: 4468/7204 cut-off events. [2024-06-14 13:23:47,023 INFO L125 PetriNetUnfolderBase]: For 1140140/1140148 co-relation queries the response was YES. [2024-06-14 13:23:47,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73065 conditions, 7204 events. 4468/7204 cut-off events. For 1140140/1140148 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 46584 event pairs, 979 based on Foata normal form. 10/7213 useless extension candidates. Maximal degree in co-relation 72851. Up to 6435 conditions per place. [2024-06-14 13:23:47,154 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 756 selfloop transitions, 154 changer transitions 0/915 dead transitions. [2024-06-14 13:23:47,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 915 transitions, 21075 flow [2024-06-14 13:23:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:23:47,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:23:47,155 INFO L175 Difference]: Start difference. First operand has 473 places, 871 transitions, 18734 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:23:47,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 915 transitions, 21075 flow [2024-06-14 13:23:52,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 915 transitions, 20864 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:52,605 INFO L231 Difference]: Finished difference. Result has 475 places, 875 transitions, 18962 flow [2024-06-14 13:23:52,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18523, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18962, PETRI_PLACES=475, PETRI_TRANSITIONS=875} [2024-06-14 13:23:52,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-14 13:23:52,606 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 875 transitions, 18962 flow [2024-06-14 13:23:52,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:52,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:52,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:52,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:23:52,606 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:52,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1365523021, now seen corresponding path program 1 times [2024-06-14 13:23:52,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:52,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009455296] [2024-06-14 13:23:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:56,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:56,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009455296] [2024-06-14 13:23:56,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009455296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:56,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:56,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829887638] [2024-06-14 13:23:56,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:56,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:56,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:56,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:56,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 875 transitions, 18962 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:23:56,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:56,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:56,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:59,797 INFO L124 PetriNetUnfolderBase]: 4530/7278 cut-off events. [2024-06-14 13:23:59,797 INFO L125 PetriNetUnfolderBase]: For 1204037/1204045 co-relation queries the response was YES. [2024-06-14 13:23:59,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74582 conditions, 7278 events. 4530/7278 cut-off events. For 1204037/1204045 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 46879 event pairs, 912 based on Foata normal form. 12/7289 useless extension candidates. Maximal degree in co-relation 74367. Up to 6100 conditions per place. [2024-06-14 13:23:59,922 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 643 selfloop transitions, 291 changer transitions 0/939 dead transitions. [2024-06-14 13:23:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 939 transitions, 21833 flow [2024-06-14 13:23:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:23:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:23:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:23:59,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:23:59,925 INFO L175 Difference]: Start difference. First operand has 475 places, 875 transitions, 18962 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:23:59,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 939 transitions, 21833 flow [2024-06-14 13:24:05,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 939 transitions, 21455 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:05,247 INFO L231 Difference]: Finished difference. Result has 481 places, 889 transitions, 19664 flow [2024-06-14 13:24:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18584, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19664, PETRI_PLACES=481, PETRI_TRANSITIONS=889} [2024-06-14 13:24:05,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-14 13:24:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 889 transitions, 19664 flow [2024-06-14 13:24:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:05,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:05,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:24:05,248 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:05,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1097653745, now seen corresponding path program 9 times [2024-06-14 13:24:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16432697] [2024-06-14 13:24:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16432697] [2024-06-14 13:24:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16432697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:08,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:08,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587788333] [2024-06-14 13:24:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 889 transitions, 19664 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:12,041 INFO L124 PetriNetUnfolderBase]: 4524/7274 cut-off events. [2024-06-14 13:24:12,041 INFO L125 PetriNetUnfolderBase]: For 1200134/1200142 co-relation queries the response was YES. [2024-06-14 13:24:12,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75235 conditions, 7274 events. 4524/7274 cut-off events. For 1200134/1200142 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46899 event pairs, 984 based on Foata normal form. 10/7283 useless extension candidates. Maximal degree in co-relation 75018. Up to 6515 conditions per place. [2024-06-14 13:24:12,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 770 selfloop transitions, 154 changer transitions 0/929 dead transitions. [2024-06-14 13:24:12,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 929 transitions, 21696 flow [2024-06-14 13:24:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:24:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:24:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:24:12,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:24:12,168 INFO L175 Difference]: Start difference. First operand has 481 places, 889 transitions, 19664 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:24:12,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 929 transitions, 21696 flow [2024-06-14 13:24:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 929 transitions, 21282 flow, removed 137 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:17,971 INFO L231 Difference]: Finished difference. Result has 484 places, 889 transitions, 19582 flow [2024-06-14 13:24:17,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19250, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19582, PETRI_PLACES=484, PETRI_TRANSITIONS=889} [2024-06-14 13:24:17,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-14 13:24:17,972 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 889 transitions, 19582 flow [2024-06-14 13:24:17,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:17,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:17,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:24:17,973 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:17,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -25441943, now seen corresponding path program 6 times [2024-06-14 13:24:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514965626] [2024-06-14 13:24:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514965626] [2024-06-14 13:24:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514965626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:21,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:21,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650803826] [2024-06-14 13:24:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:21,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:21,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 889 transitions, 19582 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:21,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:21,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:21,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:24,671 INFO L124 PetriNetUnfolderBase]: 4560/7335 cut-off events. [2024-06-14 13:24:24,672 INFO L125 PetriNetUnfolderBase]: For 1254619/1254619 co-relation queries the response was YES. [2024-06-14 13:24:24,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75595 conditions, 7335 events. 4560/7335 cut-off events. For 1254619/1254619 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 47254 event pairs, 789 based on Foata normal form. 8/7342 useless extension candidates. Maximal degree in co-relation 75378. Up to 6503 conditions per place. [2024-06-14 13:24:24,795 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 817 selfloop transitions, 109 changer transitions 0/931 dead transitions. [2024-06-14 13:24:24,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 931 transitions, 21711 flow [2024-06-14 13:24:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:24:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:24:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-14 13:24:24,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701550387596899 [2024-06-14 13:24:24,796 INFO L175 Difference]: Start difference. First operand has 484 places, 889 transitions, 19582 flow. Second operand 12 states and 191 transitions. [2024-06-14 13:24:24,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 931 transitions, 21711 flow [2024-06-14 13:24:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 931 transitions, 21306 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 13:24:30,562 INFO L231 Difference]: Finished difference. Result has 490 places, 894 transitions, 19565 flow [2024-06-14 13:24:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19179, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19565, PETRI_PLACES=490, PETRI_TRANSITIONS=894} [2024-06-14 13:24:30,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-14 13:24:30,563 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 894 transitions, 19565 flow [2024-06-14 13:24:30,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:30,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:24:30,564 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1227115027, now seen corresponding path program 10 times [2024-06-14 13:24:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:30,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218032029] [2024-06-14 13:24:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:34,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218032029] [2024-06-14 13:24:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218032029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:34,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004146880] [2024-06-14 13:24:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:34,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:34,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 894 transitions, 19565 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:34,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:34,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:34,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:37,793 INFO L124 PetriNetUnfolderBase]: 4620/7412 cut-off events. [2024-06-14 13:24:37,793 INFO L125 PetriNetUnfolderBase]: For 1280296/1280296 co-relation queries the response was YES. [2024-06-14 13:24:37,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77500 conditions, 7412 events. 4620/7412 cut-off events. For 1280296/1280296 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 47717 event pairs, 839 based on Foata normal form. 3/7408 useless extension candidates. Maximal degree in co-relation 77279. Up to 6053 conditions per place. [2024-06-14 13:24:37,933 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 550 selfloop transitions, 404 changer transitions 0/959 dead transitions. [2024-06-14 13:24:37,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 959 transitions, 22955 flow [2024-06-14 13:24:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:24:37,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:24:37,934 INFO L175 Difference]: Start difference. First operand has 490 places, 894 transitions, 19565 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:24:37,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 959 transitions, 22955 flow [2024-06-14 13:24:44,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 959 transitions, 22727 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:44,132 INFO L231 Difference]: Finished difference. Result has 492 places, 921 transitions, 20983 flow [2024-06-14 13:24:44,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19337, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20983, PETRI_PLACES=492, PETRI_TRANSITIONS=921} [2024-06-14 13:24:44,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-14 13:24:44,133 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 921 transitions, 20983 flow [2024-06-14 13:24:44,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:44,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:44,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:24:44,133 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:44,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1226994871, now seen corresponding path program 2 times [2024-06-14 13:24:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:44,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959428797] [2024-06-14 13:24:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:47,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959428797] [2024-06-14 13:24:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959428797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:47,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:47,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:47,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851993394] [2024-06-14 13:24:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:47,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:47,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:47,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:47,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 921 transitions, 20983 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:47,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:47,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:47,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:50,965 INFO L124 PetriNetUnfolderBase]: 4692/7471 cut-off events. [2024-06-14 13:24:50,965 INFO L125 PetriNetUnfolderBase]: For 1373158/1373158 co-relation queries the response was YES. [2024-06-14 13:24:51,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80167 conditions, 7471 events. 4692/7471 cut-off events. For 1373158/1373158 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 47605 event pairs, 797 based on Foata normal form. 6/7469 useless extension candidates. Maximal degree in co-relation 79945. Up to 5166 conditions per place. [2024-06-14 13:24:51,108 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 330 selfloop transitions, 645 changer transitions 0/980 dead transitions. [2024-06-14 13:24:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 980 transitions, 24555 flow [2024-06-14 13:24:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:24:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:24:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:24:51,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:24:51,110 INFO L175 Difference]: Start difference. First operand has 492 places, 921 transitions, 20983 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:24:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 980 transitions, 24555 flow [2024-06-14 13:24:56,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 980 transitions, 23428 flow, removed 158 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:56,099 INFO L231 Difference]: Finished difference. Result has 498 places, 936 transitions, 21607 flow [2024-06-14 13:24:56,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19864, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21607, PETRI_PLACES=498, PETRI_TRANSITIONS=936} [2024-06-14 13:24:56,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 454 predicate places. [2024-06-14 13:24:56,100 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 936 transitions, 21607 flow [2024-06-14 13:24:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:56,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:56,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:56,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:24:56,100 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:56,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1605752493, now seen corresponding path program 11 times [2024-06-14 13:24:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565193323] [2024-06-14 13:24:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565193323] [2024-06-14 13:24:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565193323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762040907] [2024-06-14 13:24:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:59,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 936 transitions, 21607 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:24:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:03,089 INFO L124 PetriNetUnfolderBase]: 4704/7522 cut-off events. [2024-06-14 13:25:03,089 INFO L125 PetriNetUnfolderBase]: For 1346844/1346844 co-relation queries the response was YES. [2024-06-14 13:25:03,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80996 conditions, 7522 events. 4704/7522 cut-off events. For 1346844/1346844 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48298 event pairs, 851 based on Foata normal form. 3/7517 useless extension candidates. Maximal degree in co-relation 80773. Up to 6168 conditions per place. [2024-06-14 13:25:03,233 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 562 selfloop transitions, 411 changer transitions 0/978 dead transitions. [2024-06-14 13:25:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 978 transitions, 24165 flow [2024-06-14 13:25:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:25:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:25:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:25:03,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:25:03,234 INFO L175 Difference]: Start difference. First operand has 498 places, 936 transitions, 21607 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:25:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 978 transitions, 24165 flow [2024-06-14 13:25:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 978 transitions, 23015 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:08,706 INFO L231 Difference]: Finished difference. Result has 500 places, 945 transitions, 21504 flow [2024-06-14 13:25:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20472, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21504, PETRI_PLACES=500, PETRI_TRANSITIONS=945} [2024-06-14 13:25:08,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 456 predicate places. [2024-06-14 13:25:08,707 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 945 transitions, 21504 flow [2024-06-14 13:25:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:25:08,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:08,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:25:08,707 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:08,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1609447383, now seen corresponding path program 12 times [2024-06-14 13:25:08,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:08,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229904040] [2024-06-14 13:25:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:08,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229904040] [2024-06-14 13:25:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229904040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:11,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:11,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314883298] [2024-06-14 13:25:11,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:11,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:11,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:11,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:11,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 945 transitions, 21504 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:11,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:11,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:11,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:15,086 INFO L124 PetriNetUnfolderBase]: 4785/7678 cut-off events. [2024-06-14 13:25:15,086 INFO L125 PetriNetUnfolderBase]: For 1414570/1414576 co-relation queries the response was YES. [2024-06-14 13:25:15,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82562 conditions, 7678 events. 4785/7678 cut-off events. For 1414570/1414576 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 49772 event pairs, 831 based on Foata normal form. 9/7683 useless extension candidates. Maximal degree in co-relation 82338. Up to 6261 conditions per place. [2024-06-14 13:25:15,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 560 selfloop transitions, 450 changer transitions 0/1015 dead transitions. [2024-06-14 13:25:15,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1015 transitions, 25556 flow [2024-06-14 13:25:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:25:15,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:25:15,230 INFO L175 Difference]: Start difference. First operand has 500 places, 945 transitions, 21504 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:25:15,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1015 transitions, 25556 flow [2024-06-14 13:25:21,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1015 transitions, 24866 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 13:25:21,337 INFO L231 Difference]: Finished difference. Result has 500 places, 981 transitions, 22873 flow [2024-06-14 13:25:21,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20850, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22873, PETRI_PLACES=500, PETRI_TRANSITIONS=981} [2024-06-14 13:25:21,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 456 predicate places. [2024-06-14 13:25:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 981 transitions, 22873 flow [2024-06-14 13:25:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:21,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:25:21,337 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:21,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1066640451, now seen corresponding path program 13 times [2024-06-14 13:25:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366453817] [2024-06-14 13:25:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:24,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:24,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366453817] [2024-06-14 13:25:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366453817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:24,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:24,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065677681] [2024-06-14 13:25:24,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:24,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:24,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 981 transitions, 22873 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:24,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:24,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:24,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15