./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.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/safe028_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe028_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe028_rmo.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-76401ed-m [2024-06-20 17:27:28,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:27:28,227 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:27:28,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:27:28,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:27:28,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:27:28,257 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:27:28,257 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:27:28,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:27:28,261 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:27:28,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:27:28,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:27:28,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:27:28,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:27:28,263 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:27:28,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:27:28,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:27:28,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:27:28,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:27:28,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:27:28,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:27:28,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:27:28,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:27:28,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:27:28,265 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:27:28,266 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:27:28,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:27:28,266 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:27:28,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:27:28,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:27:28,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:27:28,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:27:28,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:27:28,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:27:28,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:27:28,269 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:27:28,270 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:27:28,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:27:28,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:27:28,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:27:28,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:27:28,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:27:28,523 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:27:28,524 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:27:28,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe028_rmo.yml/witness.yml [2024-06-20 17:27:28,694 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:27:28,695 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:27:28,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-20 17:27:29,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:27:29,989 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:27:29,989 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-20 17:27:30,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed034995/c6193dcaaecb4cbca84a1f3ec32422d6/FLAGfd5d2bd94 [2024-06-20 17:27:30,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed034995/c6193dcaaecb4cbca84a1f3ec32422d6 [2024-06-20 17:27:30,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:27:30,021 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:27:30,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:27:30,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:27:30,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:27:30,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:28" (1/2) ... [2024-06-20 17:27:30,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb0b7d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:30, skipping insertion in model container [2024-06-20 17:27:30,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:28" (1/2) ... [2024-06-20 17:27:30,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30c9d88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:30, skipping insertion in model container [2024-06-20 17:27:30,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:27:30" (2/2) ... [2024-06-20 17:27:30,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb0b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30, skipping insertion in model container [2024-06-20 17:27:30,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:27:30" (2/2) ... [2024-06-20 17:27:30,032 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:27:30,144 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:27:30,145 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-20 17:27:30,145 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-20 17:27:30,146 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-20 17:27:30,146 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:27:30,146 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-20 17:27:30,182 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:27:30,446 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:27:30,452 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:27:30,559 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:27:30,637 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:27:30,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30 WrapperNode [2024-06-20 17:27:30,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:27:30,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:27:30,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:27:30,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:27:30,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,680 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-20 17:27:30,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:27:30,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:27:30,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:27:30,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:27:30,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,700 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,720 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-20 17:27:30,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:27:30,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:27:30,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:27:30,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:27:30,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (1/1) ... [2024-06-20 17:27:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:27:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:27:30,820 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) [2024-06-20 17:27:30,845 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 [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:27:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:27:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:27:30,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:27:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:27:30,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:27:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:27:30,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:27:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:27:30,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:27:30,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:27:30,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:27:30,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:27:30,870 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:27:31,025 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:27:31,026 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:27:31,475 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:27:31,476 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:27:31,722 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:27:31,722 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:27:31,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:27:31 BoogieIcfgContainer [2024-06-20 17:27:31,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:27:31,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:27:31,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:27:31,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:27:31,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:28" (1/4) ... [2024-06-20 17:27:31,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ee61ea and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:27:31, skipping insertion in model container [2024-06-20 17:27:31,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:27:30" (2/4) ... [2024-06-20 17:27:31,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ee61ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:27:31, skipping insertion in model container [2024-06-20 17:27:31,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:30" (3/4) ... [2024-06-20 17:27:31,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ee61ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:27:31, skipping insertion in model container [2024-06-20 17:27:31,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:27:31" (4/4) ... [2024-06-20 17:27:31,729 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-20 17:27:31,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:27:31,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:27:31,744 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:27:31,813 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:27:31,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:27:31,861 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:27:31,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:27:31,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 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. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:27:31,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:27:31,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:27:31,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:27:31,876 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;@406bf38d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:27:31,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:27:31,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:27:31,880 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:27:31,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:27:31,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:31,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:27:31,881 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)] === [2024-06-20 17:27:31,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:31,885 INFO L85 PathProgramCache]: Analyzing trace with hash 759262365, now seen corresponding path program 1 times [2024-06-20 17:27:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717953339] [2024-06-20 17:27:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717953339] [2024-06-20 17:27:33,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717953339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:27:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250599378] [2024-06-20 17:27:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:27:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:27:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:27:33,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 17:27:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 17:27:33,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:34,071 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-20 17:27:34,072 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 17:27:34,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7699 event pairs, 650 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-20 17:27:34,082 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:27:34,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-20 17:27:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:27:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:27:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-20 17:27:34,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-20 17:27:34,092 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-20 17:27:34,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-20 17:27:34,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:34,095 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:27:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 17:27:34,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:27:34,099 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:27:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:34,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:34,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:27:34,100 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)] === [2024-06-20 17:27:34,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -492950362, now seen corresponding path program 1 times [2024-06-20 17:27:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:34,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611222365] [2024-06-20 17:27:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:35,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:35,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611222365] [2024-06-20 17:27:35,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611222365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:35,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:27:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049103824] [2024-06-20 17:27:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:35,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:27:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:27:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:27:35,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:27:35,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:35,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:35,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:27:35,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:35,788 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-20 17:27:35,805 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-20 17:27:35,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8218 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-20 17:27:35,812 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-20 17:27:35,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-20 17:27:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:27:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:27:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-20 17:27:35,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 17:27:35,814 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-20 17:27:35,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-20 17:27:35,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:27:35,816 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 17:27:35,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 17:27:35,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 17:27:35,817 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 17:27:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:35,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:35,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:27:35,818 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)] === [2024-06-20 17:27:35,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -617306588, now seen corresponding path program 1 times [2024-06-20 17:27:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88324795] [2024-06-20 17:27:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:38,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88324795] [2024-06-20 17:27:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88324795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:38,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:38,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:27:38,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836533599] [2024-06-20 17:27:38,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:27:38,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:27:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:27:38,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:27:38,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:38,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:38,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:27:38,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:39,024 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-20 17:27:39,024 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-20 17:27:39,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8141 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-20 17:27:39,033 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 17:27:39,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-20 17:27:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 17:27:39,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-20 17:27:39,037 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-20 17:27:39,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-20 17:27:39,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:27:39,040 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 17:27:39,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 17:27:39,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 17:27:39,041 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 17:27:39,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:39,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:39,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:27:39,041 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)] === [2024-06-20 17:27:39,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1360734269, now seen corresponding path program 1 times [2024-06-20 17:27:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:39,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089566355] [2024-06-20 17:27:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:40,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:40,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089566355] [2024-06-20 17:27:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089566355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:40,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:40,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:27:40,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054811875] [2024-06-20 17:27:40,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:27:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:27:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:27:40,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:27:40,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:40,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:40,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:27:40,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:41,264 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-20 17:27:41,266 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-06-20 17:27:41,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 1558 events. 959/1558 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7517 event pairs, 367 based on Foata normal form. 4/1561 useless extension candidates. Maximal degree in co-relation 4303. Up to 1434 conditions per place. [2024-06-20 17:27:41,273 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-20 17:27:41,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 341 flow [2024-06-20 17:27:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:27:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:27:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-20 17:27:41,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-20 17:27:41,276 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 94 transitions. [2024-06-20 17:27:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 341 flow [2024-06-20 17:27:41,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:41,281 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 17:27:41,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 17:27:41,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 17:27:41,283 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 17:27:41,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:41,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:41,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:27:41,284 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)] === [2024-06-20 17:27:41,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1900309014, now seen corresponding path program 1 times [2024-06-20 17:27:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550643802] [2024-06-20 17:27:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550643802] [2024-06-20 17:27:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550643802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:43,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:43,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:43,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642336230] [2024-06-20 17:27:43,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:43,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:43,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:43,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:43,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:43,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:43,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:43,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:43,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:43,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:44,180 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-20 17:27:44,180 INFO L125 PetriNetUnfolderBase]: For 2717/2719 co-relation queries the response was YES. [2024-06-20 17:27:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2717/2719 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8340 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-20 17:27:44,192 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-20 17:27:44,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-20 17:27:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 17:27:44,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 17:27:44,197 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-20 17:27:44,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-20 17:27:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:44,204 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-20 17:27:44,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-20 17:27:44,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 17:27:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-20 17:27:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:44,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:27:44,207 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)] === [2024-06-20 17:27:44,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1918968534, now seen corresponding path program 2 times [2024-06-20 17:27:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734107560] [2024-06-20 17:27:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:45,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734107560] [2024-06-20 17:27:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734107560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:45,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131253358] [2024-06-20 17:27:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:45,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:45,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:45,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:45,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:45,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:46,756 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-20 17:27:46,757 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-20 17:27:46,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8237 event pairs, 419 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-20 17:27:46,767 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-20 17:27:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-20 17:27:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:27:46,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:27:46,769 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:27:46,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-20 17:27:46,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:27:46,775 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-20 17:27:46,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-20 17:27:46,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 17:27:46,778 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-20 17:27:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:46,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:46,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:27:46,779 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)] === [2024-06-20 17:27:46,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1995614876, now seen corresponding path program 1 times [2024-06-20 17:27:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:46,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477331069] [2024-06-20 17:27:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:46,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:49,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477331069] [2024-06-20 17:27:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477331069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:49,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83692507] [2024-06-20 17:27:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:49,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:27:49,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:49,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:49,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:27:49,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:50,300 INFO L124 PetriNetUnfolderBase]: 967/1578 cut-off events. [2024-06-20 17:27:50,300 INFO L125 PetriNetUnfolderBase]: For 3797/3797 co-relation queries the response was YES. [2024-06-20 17:27:50,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5179 conditions, 1578 events. 967/1578 cut-off events. For 3797/3797 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7633 event pairs, 333 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 5157. Up to 1424 conditions per place. [2024-06-20 17:27:50,310 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-20 17:27:50,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 476 flow [2024-06-20 17:27:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 17:27:50,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:27:50,312 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 111 transitions. [2024-06-20 17:27:50,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 476 flow [2024-06-20 17:27:50,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 432 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:50,316 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-20 17:27:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-20 17:27:50,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 17:27:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-20 17:27:50,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:50,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:50,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:50,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:27:50,318 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)] === [2024-06-20 17:27:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash 831133461, now seen corresponding path program 1 times [2024-06-20 17:27:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243932536] [2024-06-20 17:27:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:52,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243932536] [2024-06-20 17:27:52,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243932536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:52,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:52,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856315903] [2024-06-20 17:27:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:52,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:52,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:52,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:52,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:52,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:53,653 INFO L124 PetriNetUnfolderBase]: 1163/1803 cut-off events. [2024-06-20 17:27:53,653 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-20 17:27:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1803 events. 1163/1803 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8464 event pairs, 436 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-20 17:27:53,664 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-20 17:27:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-20 17:27:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:27:53,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:27:53,666 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:27:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-20 17:27:53,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:53,670 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-20 17:27:53,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-20 17:27:53,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 17:27:53,671 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-20 17:27:53,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:53,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:27:53,672 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)] === [2024-06-20 17:27:53,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 200765167, now seen corresponding path program 2 times [2024-06-20 17:27:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285280811] [2024-06-20 17:27:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:56,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:56,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285280811] [2024-06-20 17:27:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285280811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:56,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:56,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:56,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782901320] [2024-06-20 17:27:56,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:56,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:56,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:56,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:56,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:56,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:57,281 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-20 17:27:57,282 INFO L125 PetriNetUnfolderBase]: For 7661/7665 co-relation queries the response was YES. [2024-06-20 17:27:57,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7661/7665 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8868 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-20 17:27:57,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-20 17:27:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-20 17:27:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:27:57,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 17:27:57,295 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:27:57,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-20 17:27:57,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:27:57,300 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-20 17:27:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-20 17:27:57,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 17:27:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-20 17:27:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:57,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:27:57,302 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)] === [2024-06-20 17:27:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 835902005, now seen corresponding path program 1 times [2024-06-20 17:27:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529127349] [2024-06-20 17:27:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529127349] [2024-06-20 17:28:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529127349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:00,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872932010] [2024-06-20 17:28:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:00,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:00,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:00,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:00,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:00,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:01,392 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-20 17:28:01,393 INFO L125 PetriNetUnfolderBase]: For 9936/9940 co-relation queries the response was YES. [2024-06-20 17:28:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9936/9940 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9075 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-20 17:28:01,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-20 17:28:01,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-20 17:28:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:28:01,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:28:01,404 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:28:01,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-20 17:28:01,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:01,411 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-20 17:28:01,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-20 17:28:01,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 17:28:01,412 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-20 17:28:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:01,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:01,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:28:01,413 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)] === [2024-06-20 17:28:01,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1290272035, now seen corresponding path program 3 times [2024-06-20 17:28:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898554916] [2024-06-20 17:28:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898554916] [2024-06-20 17:28:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898554916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:03,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988345653] [2024-06-20 17:28:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:03,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:03,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:03,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:03,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:03,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:03,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:03,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:03,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:04,839 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-20 17:28:04,839 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-20 17:28:04,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8863 event pairs, 392 based on Foata normal form. 4/1862 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-20 17:28:04,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-20 17:28:04,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-20 17:28:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:28:04,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:28:04,851 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:28:04,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-20 17:28:04,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:04,859 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-20 17:28:04,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-20 17:28:04,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-20 17:28:04,860 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-20 17:28:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:04,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:04,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:28:04,861 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)] === [2024-06-20 17:28:04,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2064750723, now seen corresponding path program 2 times [2024-06-20 17:28:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24519329] [2024-06-20 17:28:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:07,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24519329] [2024-06-20 17:28:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24519329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:07,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:07,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273348700] [2024-06-20 17:28:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:07,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:07,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:07,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:07,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:07,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:08,712 INFO L124 PetriNetUnfolderBase]: 1219/1908 cut-off events. [2024-06-20 17:28:08,712 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-20 17:28:08,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 1908 events. 1219/1908 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9106 event pairs, 398 based on Foata normal form. 4/1909 useless extension candidates. Maximal degree in co-relation 7814. Up to 1726 conditions per place. [2024-06-20 17:28:08,721 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-20 17:28:08,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 684 flow [2024-06-20 17:28:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:28:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:28:08,723 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:28:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 684 flow [2024-06-20 17:28:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 616 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:08,731 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 421 flow [2024-06-20 17:28:08,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-20 17:28:08,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-20 17:28:08,731 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 421 flow [2024-06-20 17:28:08,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:08,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:08,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:08,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:28:08,732 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)] === [2024-06-20 17:28:08,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2064454053, now seen corresponding path program 3 times [2024-06-20 17:28:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:08,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130692819] [2024-06-20 17:28:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:11,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:11,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130692819] [2024-06-20 17:28:11,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130692819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:11,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:11,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177619823] [2024-06-20 17:28:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:11,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:11,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 421 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:11,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:11,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:12,144 INFO L124 PetriNetUnfolderBase]: 1211/1896 cut-off events. [2024-06-20 17:28:12,145 INFO L125 PetriNetUnfolderBase]: For 14763/14763 co-relation queries the response was YES. [2024-06-20 17:28:12,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1896 events. 1211/1896 cut-off events. For 14763/14763 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9093 event pairs, 366 based on Foata normal form. 4/1897 useless extension candidates. Maximal degree in co-relation 7920. Up to 1642 conditions per place. [2024-06-20 17:28:12,154 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-20 17:28:12,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 697 flow [2024-06-20 17:28:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:28:12,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:28:12,156 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 421 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:28:12,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 697 flow [2024-06-20 17:28:12,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 642 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:12,165 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 453 flow [2024-06-20 17:28:12,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-20 17:28:12,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:28:12,167 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 453 flow [2024-06-20 17:28:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:12,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:12,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:12,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:28:12,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:12,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1506579402, now seen corresponding path program 1 times [2024-06-20 17:28:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:12,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49902126] [2024-06-20 17:28:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49902126] [2024-06-20 17:28:14,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49902126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:14,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:14,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:14,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545251968] [2024-06-20 17:28:14,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:14,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:14,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:28:14,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2024-06-20 17:28:14,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:14,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:28:14,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:14,767 INFO L124 PetriNetUnfolderBase]: 1035/1704 cut-off events. [2024-06-20 17:28:14,767 INFO L125 PetriNetUnfolderBase]: For 13501/13501 co-relation queries the response was YES. [2024-06-20 17:28:14,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 1704 events. 1035/1704 cut-off events. For 13501/13501 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8396 event pairs, 357 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 7105. Up to 1568 conditions per place. [2024-06-20 17:28:14,789 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 69 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-20 17:28:14,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 651 flow [2024-06-20 17:28:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 17:28:14,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 17:28:14,791 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 453 flow. Second operand 5 states and 89 transitions. [2024-06-20 17:28:14,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 651 flow [2024-06-20 17:28:14,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:14,801 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 430 flow [2024-06-20 17:28:14,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-20 17:28:14,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:28:14,802 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 430 flow [2024-06-20 17:28:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2024-06-20 17:28:14,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:14,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:28:14,803 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)] === [2024-06-20 17:28:14,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash -508987982, now seen corresponding path program 1 times [2024-06-20 17:28:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:14,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204097913] [2024-06-20 17:28:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204097913] [2024-06-20 17:28:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204097913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:17,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256118257] [2024-06-20 17:28:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:17,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:17,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:17,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:17,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:17,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:18,843 INFO L124 PetriNetUnfolderBase]: 1394/2205 cut-off events. [2024-06-20 17:28:18,843 INFO L125 PetriNetUnfolderBase]: For 23094/23094 co-relation queries the response was YES. [2024-06-20 17:28:18,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9904 conditions, 2205 events. 1394/2205 cut-off events. For 23094/23094 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11105 event pairs, 374 based on Foata normal form. 16/2220 useless extension candidates. Maximal degree in co-relation 9874. Up to 1733 conditions per place. [2024-06-20 17:28:18,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-20 17:28:18,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 926 flow [2024-06-20 17:28:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:28:18,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 17:28:18,861 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 430 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:28:18,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 926 flow [2024-06-20 17:28:18,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 128 transitions, 902 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:18,872 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 498 flow [2024-06-20 17:28:18,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-06-20 17:28:18,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 17:28:18,874 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 498 flow [2024-06-20 17:28:18,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:18,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:18,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:28:18,875 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)] === [2024-06-20 17:28:18,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1326995748, now seen corresponding path program 2 times [2024-06-20 17:28:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36845671] [2024-06-20 17:28:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:21,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:21,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36845671] [2024-06-20 17:28:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36845671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:21,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:21,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190800197] [2024-06-20 17:28:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:21,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:21,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 498 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:22,935 INFO L124 PetriNetUnfolderBase]: 1358/2149 cut-off events. [2024-06-20 17:28:22,936 INFO L125 PetriNetUnfolderBase]: For 24002/24002 co-relation queries the response was YES. [2024-06-20 17:28:22,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9635 conditions, 2149 events. 1358/2149 cut-off events. For 24002/24002 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10721 event pairs, 467 based on Foata normal form. 20/2168 useless extension candidates. Maximal degree in co-relation 9604. Up to 1873 conditions per place. [2024-06-20 17:28:22,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-06-20 17:28:22,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 838 flow [2024-06-20 17:28:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:28:22,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:28:22,947 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 498 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:28:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 838 flow [2024-06-20 17:28:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 796 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:22,965 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 493 flow [2024-06-20 17:28:22,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2024-06-20 17:28:22,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 17:28:22,965 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 493 flow [2024-06-20 17:28:22,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:22,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:22,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:28:22,966 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)] === [2024-06-20 17:28:22,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1043268934, now seen corresponding path program 3 times [2024-06-20 17:28:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717878872] [2024-06-20 17:28:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:25,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717878872] [2024-06-20 17:28:25,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717878872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:25,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991685870] [2024-06-20 17:28:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:25,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:25,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:25,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:25,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:25,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:26,927 INFO L124 PetriNetUnfolderBase]: 1446/2323 cut-off events. [2024-06-20 17:28:26,927 INFO L125 PetriNetUnfolderBase]: For 26883/26887 co-relation queries the response was YES. [2024-06-20 17:28:26,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2323 events. 1446/2323 cut-off events. For 26883/26887 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11944 event pairs, 407 based on Foata normal form. 24/2346 useless extension candidates. Maximal degree in co-relation 10290. Up to 1893 conditions per place. [2024-06-20 17:28:26,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 27 changer transitions 0/117 dead transitions. [2024-06-20 17:28:26,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 855 flow [2024-06-20 17:28:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:28:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:28:26,942 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 493 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:28:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 855 flow [2024-06-20 17:28:26,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 820 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:26,956 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 547 flow [2024-06-20 17:28:26,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-06-20 17:28:26,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 17:28:26,957 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 547 flow [2024-06-20 17:28:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:26,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:26,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:26,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:28:26,958 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)] === [2024-06-20 17:28:26,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash 142975860, now seen corresponding path program 1 times [2024-06-20 17:28:26,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:26,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573616618] [2024-06-20 17:28:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:26,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:29,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573616618] [2024-06-20 17:28:29,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573616618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:29,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:29,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369180903] [2024-06-20 17:28:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:29,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:29,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:29,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:29,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 547 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:29,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:29,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:29,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:31,249 INFO L124 PetriNetUnfolderBase]: 1494/2401 cut-off events. [2024-06-20 17:28:31,250 INFO L125 PetriNetUnfolderBase]: For 29858/29862 co-relation queries the response was YES. [2024-06-20 17:28:31,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 2401 events. 1494/2401 cut-off events. For 29858/29862 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12548 event pairs, 403 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 10900. Up to 1725 conditions per place. [2024-06-20 17:28:31,262 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 30 changer transitions 0/120 dead transitions. [2024-06-20 17:28:31,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 927 flow [2024-06-20 17:28:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:28:31,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 17:28:31,264 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 547 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:28:31,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 927 flow [2024-06-20 17:28:31,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 862 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:31,304 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 578 flow [2024-06-20 17:28:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-20 17:28:31,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-20 17:28:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 578 flow [2024-06-20 17:28:31,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:31,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:28:31,306 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash -430225867, now seen corresponding path program 1 times [2024-06-20 17:28:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:31,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901941943] [2024-06-20 17:28:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901941943] [2024-06-20 17:28:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901941943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:33,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:33,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916549222] [2024-06-20 17:28:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:33,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:33,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:33,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 578 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:33,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:33,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:33,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:34,300 INFO L124 PetriNetUnfolderBase]: 1504/2411 cut-off events. [2024-06-20 17:28:34,300 INFO L125 PetriNetUnfolderBase]: For 30368/30368 co-relation queries the response was YES. [2024-06-20 17:28:34,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 2411 events. 1504/2411 cut-off events. For 30368/30368 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12609 event pairs, 512 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 11052. Up to 2267 conditions per place. [2024-06-20 17:28:34,312 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 84 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-20 17:28:34,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 936 flow [2024-06-20 17:28:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:28:34,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:28:34,314 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 578 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:28:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 936 flow [2024-06-20 17:28:34,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 858 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:34,332 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 609 flow [2024-06-20 17:28:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-06-20 17:28:34,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-20 17:28:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 609 flow [2024-06-20 17:28:34,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:34,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:34,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:34,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:28:34,334 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)] === [2024-06-20 17:28:34,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 681226938, now seen corresponding path program 4 times [2024-06-20 17:28:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755260269] [2024-06-20 17:28:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:37,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755260269] [2024-06-20 17:28:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755260269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:37,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665322902] [2024-06-20 17:28:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:37,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:37,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:37,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:37,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:37,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:38,612 INFO L124 PetriNetUnfolderBase]: 1536/2481 cut-off events. [2024-06-20 17:28:38,612 INFO L125 PetriNetUnfolderBase]: For 34785/34785 co-relation queries the response was YES. [2024-06-20 17:28:38,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11404 conditions, 2481 events. 1536/2481 cut-off events. For 34785/34785 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13212 event pairs, 446 based on Foata normal form. 20/2496 useless extension candidates. Maximal degree in co-relation 11367. Up to 2051 conditions per place. [2024-06-20 17:28:38,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-20 17:28:38,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 977 flow [2024-06-20 17:28:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:28:38,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:28:38,626 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 609 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:28:38,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 977 flow [2024-06-20 17:28:38,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 961 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 17:28:38,674 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 686 flow [2024-06-20 17:28:38,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-06-20 17:28:38,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-20 17:28:38,674 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 686 flow [2024-06-20 17:28:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:38,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:38,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:38,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:28:38,675 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)] === [2024-06-20 17:28:38,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2091439852, now seen corresponding path program 2 times [2024-06-20 17:28:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:38,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089119534] [2024-06-20 17:28:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:41,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:41,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089119534] [2024-06-20 17:28:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089119534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:41,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:41,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602692551] [2024-06-20 17:28:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:41,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:41,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 686 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:41,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:41,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:41,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:43,114 INFO L124 PetriNetUnfolderBase]: 1584/2577 cut-off events. [2024-06-20 17:28:43,115 INFO L125 PetriNetUnfolderBase]: For 38282/38282 co-relation queries the response was YES. [2024-06-20 17:28:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 2577 events. 1584/2577 cut-off events. For 38282/38282 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13931 event pairs, 446 based on Foata normal form. 12/2584 useless extension candidates. Maximal degree in co-relation 12111. Up to 2029 conditions per place. [2024-06-20 17:28:43,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 92 selfloop transitions, 29 changer transitions 0/126 dead transitions. [2024-06-20 17:28:43,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 126 transitions, 1074 flow [2024-06-20 17:28:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:28:43,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:28:43,131 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 686 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:28:43,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 126 transitions, 1074 flow [2024-06-20 17:28:43,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1005 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:43,157 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 715 flow [2024-06-20 17:28:43,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2024-06-20 17:28:43,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 17:28:43,158 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 715 flow [2024-06-20 17:28:43,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:43,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:43,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:43,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:28:43,158 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)] === [2024-06-20 17:28:43,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1747117918, now seen corresponding path program 3 times [2024-06-20 17:28:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:43,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788089222] [2024-06-20 17:28:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:43,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:46,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788089222] [2024-06-20 17:28:46,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788089222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:46,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:46,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:46,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148479938] [2024-06-20 17:28:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 715 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:46,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:46,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:46,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:47,467 INFO L124 PetriNetUnfolderBase]: 1564/2533 cut-off events. [2024-06-20 17:28:47,467 INFO L125 PetriNetUnfolderBase]: For 37575/37575 co-relation queries the response was YES. [2024-06-20 17:28:47,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11742 conditions, 2533 events. 1564/2533 cut-off events. For 37575/37575 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13610 event pairs, 393 based on Foata normal form. 12/2540 useless extension candidates. Maximal degree in co-relation 11701. Up to 1465 conditions per place. [2024-06-20 17:28:47,481 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 36 changer transitions 0/125 dead transitions. [2024-06-20 17:28:47,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 1029 flow [2024-06-20 17:28:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:28:47,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:28:47,484 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 715 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:28:47,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 1029 flow [2024-06-20 17:28:47,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 949 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:47,513 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 671 flow [2024-06-20 17:28:47,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-06-20 17:28:47,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 17:28:47,514 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 671 flow [2024-06-20 17:28:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:47,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:28:47,514 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:47,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1254061691, now seen corresponding path program 2 times [2024-06-20 17:28:47,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:47,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812249270] [2024-06-20 17:28:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:47,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:49,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812249270] [2024-06-20 17:28:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812249270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:49,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:49,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366939231] [2024-06-20 17:28:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:49,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:49,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:49,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:49,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:49,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:50,537 INFO L124 PetriNetUnfolderBase]: 1558/2525 cut-off events. [2024-06-20 17:28:50,537 INFO L125 PetriNetUnfolderBase]: For 37066/37066 co-relation queries the response was YES. [2024-06-20 17:28:50,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11741 conditions, 2525 events. 1558/2525 cut-off events. For 37066/37066 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13602 event pairs, 542 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 11699. Up to 2374 conditions per place. [2024-06-20 17:28:50,552 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 76 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2024-06-20 17:28:50,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 99 transitions, 905 flow [2024-06-20 17:28:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 17:28:50,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:28:50,553 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 671 flow. Second operand 6 states and 100 transitions. [2024-06-20 17:28:50,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 99 transitions, 905 flow [2024-06-20 17:28:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 791 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:50,582 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 599 flow [2024-06-20 17:28:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=599, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-06-20 17:28:50,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 17:28:50,583 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 599 flow [2024-06-20 17:28:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:50,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:50,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:28:50,584 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -423552683, now seen corresponding path program 1 times [2024-06-20 17:28:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145212513] [2024-06-20 17:28:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145212513] [2024-06-20 17:28:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145212513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:52,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:52,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907543951] [2024-06-20 17:28:52,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:28:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 86 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-20 17:28:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:28:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:53,612 INFO L124 PetriNetUnfolderBase]: 1485/2483 cut-off events. [2024-06-20 17:28:53,612 INFO L125 PetriNetUnfolderBase]: For 32701/32701 co-relation queries the response was YES. [2024-06-20 17:28:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 2483 events. 1485/2483 cut-off events. For 32701/32701 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13845 event pairs, 420 based on Foata normal form. 4/2477 useless extension candidates. Maximal degree in co-relation 10747. Up to 2237 conditions per place. [2024-06-20 17:28:53,626 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 86 selfloop transitions, 18 changer transitions 0/113 dead transitions. [2024-06-20 17:28:53,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 949 flow [2024-06-20 17:28:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:28:53,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:28:53,628 INFO L175 Difference]: Start difference. First operand has 95 places, 86 transitions, 599 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:28:53,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 949 flow [2024-06-20 17:28:53,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 113 transitions, 910 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:53,654 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 656 flow [2024-06-20 17:28:53,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-06-20 17:28:53,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-20 17:28:53,655 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 656 flow [2024-06-20 17:28:53,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-20 17:28:53,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:53,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:28:53,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 412176007, now seen corresponding path program 2 times [2024-06-20 17:28:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622645513] [2024-06-20 17:28:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:55,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:55,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622645513] [2024-06-20 17:28:55,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622645513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:55,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055204872] [2024-06-20 17:28:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:28:55,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 656 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-20 17:28:55,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:55,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:28:55,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:56,441 INFO L124 PetriNetUnfolderBase]: 1466/2451 cut-off events. [2024-06-20 17:28:56,442 INFO L125 PetriNetUnfolderBase]: For 34481/34481 co-relation queries the response was YES. [2024-06-20 17:28:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10894 conditions, 2451 events. 1466/2451 cut-off events. For 34481/34481 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13661 event pairs, 449 based on Foata normal form. 6/2450 useless extension candidates. Maximal degree in co-relation 10851. Up to 2259 conditions per place. [2024-06-20 17:28:56,472 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 84 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-20 17:28:56,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 882 flow [2024-06-20 17:28:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:28:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-20 17:28:56,474 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 656 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:28:56,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 882 flow [2024-06-20 17:28:56,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 844 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:56,526 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 651 flow [2024-06-20 17:28:56,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=651, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-06-20 17:28:56,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-20 17:28:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 651 flow [2024-06-20 17:28:56,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-20 17:28:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:56,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:28:56,528 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:56,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -452098664, now seen corresponding path program 1 times [2024-06-20 17:28:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:56,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488795680] [2024-06-20 17:28:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:58,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:58,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488795680] [2024-06-20 17:28:58,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488795680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:58,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:58,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:58,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061496452] [2024-06-20 17:28:58,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:58,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:58,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:58,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:58,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:58,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 651 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:58,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:58,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:58,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:00,153 INFO L124 PetriNetUnfolderBase]: 1590/2585 cut-off events. [2024-06-20 17:29:00,153 INFO L125 PetriNetUnfolderBase]: For 42864/42864 co-relation queries the response was YES. [2024-06-20 17:29:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11992 conditions, 2585 events. 1590/2585 cut-off events. For 42864/42864 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13969 event pairs, 522 based on Foata normal form. 4/2588 useless extension candidates. Maximal degree in co-relation 11947. Up to 2370 conditions per place. [2024-06-20 17:29:00,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 95 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-20 17:29:00,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 125 transitions, 1083 flow [2024-06-20 17:29:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:29:00,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:29:00,170 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 651 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:29:00,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 125 transitions, 1083 flow [2024-06-20 17:29:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 125 transitions, 1045 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:00,195 INFO L231 Difference]: Finished difference. Result has 103 places, 98 transitions, 731 flow [2024-06-20 17:29:00,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2024-06-20 17:29:00,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 17:29:00,196 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 731 flow [2024-06-20 17:29:00,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:00,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:00,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:29:00,197 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)] === [2024-06-20 17:29:00,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -129109130, now seen corresponding path program 2 times [2024-06-20 17:29:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441333658] [2024-06-20 17:29:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:00,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:02,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441333658] [2024-06-20 17:29:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441333658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:02,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:02,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:02,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801339639] [2024-06-20 17:29:02,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:02,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:02,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:02,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 731 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:02,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:02,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:02,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:03,602 INFO L124 PetriNetUnfolderBase]: 1610/2607 cut-off events. [2024-06-20 17:29:03,603 INFO L125 PetriNetUnfolderBase]: For 46808/46808 co-relation queries the response was YES. [2024-06-20 17:29:03,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 2607 events. 1610/2607 cut-off events. For 46808/46808 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14119 event pairs, 531 based on Foata normal form. 4/2606 useless extension candidates. Maximal degree in co-relation 12491. Up to 2386 conditions per place. [2024-06-20 17:29:03,621 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 87 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-20 17:29:03,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 120 transitions, 1113 flow [2024-06-20 17:29:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:29:03,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:29:03,623 INFO L175 Difference]: Start difference. First operand has 103 places, 98 transitions, 731 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:29:03,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 120 transitions, 1113 flow [2024-06-20 17:29:03,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 1072 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:03,655 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 786 flow [2024-06-20 17:29:03,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-20 17:29:03,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-20 17:29:03,656 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 786 flow [2024-06-20 17:29:03,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:03,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:03,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:03,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:29:03,656 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:03,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -97419914, now seen corresponding path program 3 times [2024-06-20 17:29:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:03,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556852181] [2024-06-20 17:29:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:06,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556852181] [2024-06-20 17:29:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556852181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:06,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713254942] [2024-06-20 17:29:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:06,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:06,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 786 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:06,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:06,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:06,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:07,329 INFO L124 PetriNetUnfolderBase]: 1598/2605 cut-off events. [2024-06-20 17:29:07,329 INFO L125 PetriNetUnfolderBase]: For 48433/48433 co-relation queries the response was YES. [2024-06-20 17:29:07,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12531 conditions, 2605 events. 1598/2605 cut-off events. For 48433/48433 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14130 event pairs, 515 based on Foata normal form. 4/2608 useless extension candidates. Maximal degree in co-relation 12483. Up to 2462 conditions per place. [2024-06-20 17:29:07,342 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 97 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-20 17:29:07,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 116 transitions, 1050 flow [2024-06-20 17:29:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 17:29:07,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 17:29:07,345 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 786 flow. Second operand 7 states and 110 transitions. [2024-06-20 17:29:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 116 transitions, 1050 flow [2024-06-20 17:29:07,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 116 transitions, 954 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:07,384 INFO L231 Difference]: Finished difference. Result has 109 places, 101 transitions, 724 flow [2024-06-20 17:29:07,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2024-06-20 17:29:07,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-20 17:29:07,389 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 724 flow [2024-06-20 17:29:07,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:07,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:07,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:07,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:29:07,390 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:07,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -97405034, now seen corresponding path program 1 times [2024-06-20 17:29:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287069217] [2024-06-20 17:29:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:10,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:10,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287069217] [2024-06-20 17:29:10,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287069217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:10,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:10,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064868960] [2024-06-20 17:29:10,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:10,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:10,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:10,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:10,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 724 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) [2024-06-20 17:29:10,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:10,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:10,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:11,491 INFO L124 PetriNetUnfolderBase]: 1593/2598 cut-off events. [2024-06-20 17:29:11,491 INFO L125 PetriNetUnfolderBase]: For 49685/49685 co-relation queries the response was YES. [2024-06-20 17:29:11,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 2598 events. 1593/2598 cut-off events. For 49685/49685 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14027 event pairs, 518 based on Foata normal form. 2/2599 useless extension candidates. Maximal degree in co-relation 12341. Up to 2465 conditions per place. [2024-06-20 17:29:11,506 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2024-06-20 17:29:11,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 117 transitions, 1006 flow [2024-06-20 17:29:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 17:29:11,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 17:29:11,508 INFO L175 Difference]: Start difference. First operand has 109 places, 101 transitions, 724 flow. Second operand 7 states and 108 transitions. [2024-06-20 17:29:11,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 117 transitions, 1006 flow [2024-06-20 17:29:11,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 117 transitions, 947 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:29:11,535 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 726 flow [2024-06-20 17:29:11,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-06-20 17:29:11,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 17:29:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 726 flow [2024-06-20 17:29:11,537 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) [2024-06-20 17:29:11,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:11,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:29:11,537 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1134923884, now seen corresponding path program 1 times [2024-06-20 17:29:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023769275] [2024-06-20 17:29:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023769275] [2024-06-20 17:29:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023769275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056937052] [2024-06-20 17:29:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:13,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:13,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:13,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:13,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:14,946 INFO L124 PetriNetUnfolderBase]: 1619/2644 cut-off events. [2024-06-20 17:29:14,946 INFO L125 PetriNetUnfolderBase]: For 53945/53947 co-relation queries the response was YES. [2024-06-20 17:29:14,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 2644 events. 1619/2644 cut-off events. For 53945/53947 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14325 event pairs, 463 based on Foata normal form. 4/2647 useless extension candidates. Maximal degree in co-relation 12700. Up to 2364 conditions per place. [2024-06-20 17:29:14,963 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 114 selfloop transitions, 32 changer transitions 0/151 dead transitions. [2024-06-20 17:29:14,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1332 flow [2024-06-20 17:29:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:29:14,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:29:14,964 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 726 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:29:14,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1332 flow [2024-06-20 17:29:15,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1287 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:15,008 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 928 flow [2024-06-20 17:29:15,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-20 17:29:15,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 17:29:15,008 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 928 flow [2024-06-20 17:29:15,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:15,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:15,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:29:15,009 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:15,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1130162284, now seen corresponding path program 2 times [2024-06-20 17:29:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865919843] [2024-06-20 17:29:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:17,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865919843] [2024-06-20 17:29:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865919843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:17,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582634380] [2024-06-20 17:29:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:17,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:17,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 928 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:17,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:18,515 INFO L124 PetriNetUnfolderBase]: 1639/2662 cut-off events. [2024-06-20 17:29:18,516 INFO L125 PetriNetUnfolderBase]: For 59315/59315 co-relation queries the response was YES. [2024-06-20 17:29:18,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13455 conditions, 2662 events. 1639/2662 cut-off events. For 59315/59315 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14410 event pairs, 522 based on Foata normal form. 4/2665 useless extension candidates. Maximal degree in co-relation 13404. Up to 2477 conditions per place. [2024-06-20 17:29:18,529 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-20 17:29:18,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1358 flow [2024-06-20 17:29:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:29:18,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:29:18,530 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 928 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:29:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1358 flow [2024-06-20 17:29:18,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 150 transitions, 1326 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-20 17:29:18,565 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1038 flow [2024-06-20 17:29:18,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-20 17:29:18,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-20 17:29:18,565 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1038 flow [2024-06-20 17:29:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:18,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:29:18,566 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -962433994, now seen corresponding path program 3 times [2024-06-20 17:29:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687629844] [2024-06-20 17:29:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687629844] [2024-06-20 17:29:20,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687629844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:20,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:20,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:20,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303292833] [2024-06-20 17:29:20,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:20,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:20,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:20,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:20,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:20,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:20,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:21,617 INFO L124 PetriNetUnfolderBase]: 1649/2681 cut-off events. [2024-06-20 17:29:21,618 INFO L125 PetriNetUnfolderBase]: For 62861/62861 co-relation queries the response was YES. [2024-06-20 17:29:21,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14027 conditions, 2681 events. 1649/2681 cut-off events. For 62861/62861 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14577 event pairs, 460 based on Foata normal form. 2/2680 useless extension candidates. Maximal degree in co-relation 13973. Up to 2398 conditions per place. [2024-06-20 17:29:21,633 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-20 17:29:21,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 1568 flow [2024-06-20 17:29:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:29:21,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:29:21,635 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1038 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:29:21,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 1568 flow [2024-06-20 17:29:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1482 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:21,678 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 1082 flow [2024-06-20 17:29:21,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-06-20 17:29:21,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-20 17:29:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 1082 flow [2024-06-20 17:29:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:21,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:21,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:29:21,679 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 976693750, now seen corresponding path program 4 times [2024-06-20 17:29:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514405589] [2024-06-20 17:29:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514405589] [2024-06-20 17:29:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514405589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:24,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:24,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476467781] [2024-06-20 17:29:24,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:24,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:24,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 1082 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:24,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:24,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:24,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:25,225 INFO L124 PetriNetUnfolderBase]: 1659/2693 cut-off events. [2024-06-20 17:29:25,226 INFO L125 PetriNetUnfolderBase]: For 66553/66553 co-relation queries the response was YES. [2024-06-20 17:29:25,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14266 conditions, 2693 events. 1659/2693 cut-off events. For 66553/66553 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14648 event pairs, 465 based on Foata normal form. 2/2692 useless extension candidates. Maximal degree in co-relation 14211. Up to 2408 conditions per place. [2024-06-20 17:29:25,242 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 43 changer transitions 0/155 dead transitions. [2024-06-20 17:29:25,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 155 transitions, 1540 flow [2024-06-20 17:29:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:29:25,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:29:25,244 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 1082 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:29:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 155 transitions, 1540 flow [2024-06-20 17:29:25,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 155 transitions, 1473 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 17:29:25,291 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1155 flow [2024-06-20 17:29:25,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-20 17:29:25,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 17:29:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1155 flow [2024-06-20 17:29:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:25,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:25,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:29:25,292 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:25,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash 292578678, now seen corresponding path program 5 times [2024-06-20 17:29:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:25,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696726789] [2024-06-20 17:29:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696726789] [2024-06-20 17:29:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696726789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:27,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:27,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186974807] [2024-06-20 17:29:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:27,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:27,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:27,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1155 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:27,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:27,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:28,711 INFO L124 PetriNetUnfolderBase]: 1663/2690 cut-off events. [2024-06-20 17:29:28,711 INFO L125 PetriNetUnfolderBase]: For 70617/70617 co-relation queries the response was YES. [2024-06-20 17:29:28,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14324 conditions, 2690 events. 1663/2690 cut-off events. For 70617/70617 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14695 event pairs, 537 based on Foata normal form. 4/2689 useless extension candidates. Maximal degree in co-relation 14267. Up to 2482 conditions per place. [2024-06-20 17:29:28,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 40 changer transitions 0/157 dead transitions. [2024-06-20 17:29:28,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 157 transitions, 1613 flow [2024-06-20 17:29:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:29:28,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:29:28,731 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1155 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:29:28,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 157 transitions, 1613 flow [2024-06-20 17:29:28,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 157 transitions, 1539 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:28,783 INFO L231 Difference]: Finished difference. Result has 131 places, 138 transitions, 1217 flow [2024-06-20 17:29:28,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1217, PETRI_PLACES=131, PETRI_TRANSITIONS=138} [2024-06-20 17:29:28,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 17:29:28,783 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 138 transitions, 1217 flow [2024-06-20 17:29:28,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:28,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:28,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:29:28,784 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:28,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 302812794, now seen corresponding path program 6 times [2024-06-20 17:29:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:28,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386715426] [2024-06-20 17:29:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386715426] [2024-06-20 17:29:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386715426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:31,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582669418] [2024-06-20 17:29:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:31,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:31,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 138 transitions, 1217 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:31,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:31,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:31,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:31,923 INFO L124 PetriNetUnfolderBase]: 1657/2678 cut-off events. [2024-06-20 17:29:31,923 INFO L125 PetriNetUnfolderBase]: For 72870/72870 co-relation queries the response was YES. [2024-06-20 17:29:31,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14587 conditions, 2678 events. 1657/2678 cut-off events. For 72870/72870 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14580 event pairs, 535 based on Foata normal form. 2/2675 useless extension candidates. Maximal degree in co-relation 14529. Up to 2477 conditions per place. [2024-06-20 17:29:31,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-20 17:29:31,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 152 transitions, 1543 flow [2024-06-20 17:29:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:29:31,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 17:29:31,942 INFO L175 Difference]: Start difference. First operand has 131 places, 138 transitions, 1217 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:29:31,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 152 transitions, 1543 flow [2024-06-20 17:29:31,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 152 transitions, 1419 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:32,000 INFO L231 Difference]: Finished difference. Result has 132 places, 138 transitions, 1177 flow [2024-06-20 17:29:32,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=132, PETRI_TRANSITIONS=138} [2024-06-20 17:29:32,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-20 17:29:32,001 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 138 transitions, 1177 flow [2024-06-20 17:29:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:32,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:32,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:29:32,002 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 984945268, now seen corresponding path program 1 times [2024-06-20 17:29:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482694045] [2024-06-20 17:29:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:34,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482694045] [2024-06-20 17:29:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482694045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:34,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814268403] [2024-06-20 17:29:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:34,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:34,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:29:34,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 138 transitions, 1177 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:34,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:34,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:29:34,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:36,070 INFO L124 PetriNetUnfolderBase]: 1666/2754 cut-off events. [2024-06-20 17:29:36,070 INFO L125 PetriNetUnfolderBase]: For 87528/87528 co-relation queries the response was YES. [2024-06-20 17:29:36,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15196 conditions, 2754 events. 1666/2754 cut-off events. For 87528/87528 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15405 event pairs, 435 based on Foata normal form. 10/2760 useless extension candidates. Maximal degree in co-relation 15137. Up to 2308 conditions per place. [2024-06-20 17:29:36,090 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-20 17:29:36,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 174 transitions, 1685 flow [2024-06-20 17:29:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 17:29:36,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-20 17:29:36,092 INFO L175 Difference]: Start difference. First operand has 132 places, 138 transitions, 1177 flow. Second operand 7 states and 134 transitions. [2024-06-20 17:29:36,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 174 transitions, 1685 flow [2024-06-20 17:29:36,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 1607 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:36,145 INFO L231 Difference]: Finished difference. Result has 133 places, 140 transitions, 1183 flow [2024-06-20 17:29:36,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=133, PETRI_TRANSITIONS=140} [2024-06-20 17:29:36,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-20 17:29:36,145 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 140 transitions, 1183 flow [2024-06-20 17:29:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:36,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:36,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:36,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:29:36,146 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:36,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -729843788, now seen corresponding path program 2 times [2024-06-20 17:29:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:36,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306723162] [2024-06-20 17:29:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306723162] [2024-06-20 17:29:39,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306723162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:39,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:39,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:39,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677590962] [2024-06-20 17:29:39,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:39,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:29:39,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 140 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:39,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:39,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:29:39,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:40,322 INFO L124 PetriNetUnfolderBase]: 1714/2816 cut-off events. [2024-06-20 17:29:40,322 INFO L125 PetriNetUnfolderBase]: For 95679/95681 co-relation queries the response was YES. [2024-06-20 17:29:40,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15792 conditions, 2816 events. 1714/2816 cut-off events. For 95679/95681 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15762 event pairs, 473 based on Foata normal form. 14/2822 useless extension candidates. Maximal degree in co-relation 15732. Up to 2479 conditions per place. [2024-06-20 17:29:40,340 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 23 changer transitions 0/168 dead transitions. [2024-06-20 17:29:40,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 168 transitions, 1575 flow [2024-06-20 17:29:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:29:40,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:29:40,341 INFO L175 Difference]: Start difference. First operand has 133 places, 140 transitions, 1183 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:29:40,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 168 transitions, 1575 flow [2024-06-20 17:29:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 1542 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:40,405 INFO L231 Difference]: Finished difference. Result has 137 places, 141 transitions, 1220 flow [2024-06-20 17:29:40,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=137, PETRI_TRANSITIONS=141} [2024-06-20 17:29:40,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 17:29:40,406 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 141 transitions, 1220 flow [2024-06-20 17:29:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:40,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:40,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:29:40,406 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:40,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash 299253846, now seen corresponding path program 3 times [2024-06-20 17:29:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:40,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053478258] [2024-06-20 17:29:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053478258] [2024-06-20 17:29:43,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053478258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:43,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:43,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146909517] [2024-06-20 17:29:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:43,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:43,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:29:43,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 141 transitions, 1220 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:43,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:29:43,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:44,137 INFO L124 PetriNetUnfolderBase]: 1679/2760 cut-off events. [2024-06-20 17:29:44,138 INFO L125 PetriNetUnfolderBase]: For 90752/90752 co-relation queries the response was YES. [2024-06-20 17:29:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2760 events. 1679/2760 cut-off events. For 90752/90752 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15436 event pairs, 496 based on Foata normal form. 14/2773 useless extension candidates. Maximal degree in co-relation 15201. Up to 2472 conditions per place. [2024-06-20 17:29:44,158 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2024-06-20 17:29:44,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 162 transitions, 1570 flow [2024-06-20 17:29:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:29:44,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:29:44,160 INFO L175 Difference]: Start difference. First operand has 137 places, 141 transitions, 1220 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:29:44,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 162 transitions, 1570 flow [2024-06-20 17:29:44,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 162 transitions, 1518 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:44,209 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1206 flow [2024-06-20 17:29:44,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1206, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2024-06-20 17:29:44,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 17:29:44,209 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1206 flow [2024-06-20 17:29:44,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-20 17:29:44,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:44,210 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] [2024-06-20 17:29:44,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:29:44,210 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)] === [2024-06-20 17:29:44,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash -822900711, now seen corresponding path program 1 times [2024-06-20 17:29:44,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:44,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245907308] [2024-06-20 17:29:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:44,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:46,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245907308] [2024-06-20 17:29:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245907308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:46,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848205657] [2024-06-20 17:29:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:46,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:46,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:46,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1206 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) [2024-06-20 17:29:46,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:46,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:46,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:48,025 INFO L124 PetriNetUnfolderBase]: 1810/2929 cut-off events. [2024-06-20 17:29:48,026 INFO L125 PetriNetUnfolderBase]: For 89697/89699 co-relation queries the response was YES. [2024-06-20 17:29:48,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16056 conditions, 2929 events. 1810/2929 cut-off events. For 89697/89699 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16094 event pairs, 485 based on Foata normal form. 6/2934 useless extension candidates. Maximal degree in co-relation 15993. Up to 2477 conditions per place. [2024-06-20 17:29:48,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 56 changer transitions 0/192 dead transitions. [2024-06-20 17:29:48,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 192 transitions, 1958 flow [2024-06-20 17:29:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:29:48,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:29:48,047 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1206 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:29:48,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 192 transitions, 1958 flow [2024-06-20 17:29:48,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 1915 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:48,109 INFO L231 Difference]: Finished difference. Result has 142 places, 156 transitions, 1473 flow [2024-06-20 17:29:48,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1473, PETRI_PLACES=142, PETRI_TRANSITIONS=156} [2024-06-20 17:29:48,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-20 17:29:48,111 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 156 transitions, 1473 flow [2024-06-20 17:29:48,111 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) [2024-06-20 17:29:48,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:48,111 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] [2024-06-20 17:29:48,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:29:48,112 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)] === [2024-06-20 17:29:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -675083721, now seen corresponding path program 2 times [2024-06-20 17:29:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:48,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276543311] [2024-06-20 17:29:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:50,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276543311] [2024-06-20 17:29:50,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276543311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:50,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181103039] [2024-06-20 17:29:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:50,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:50,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 156 transitions, 1473 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) [2024-06-20 17:29:50,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:50,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:50,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:51,739 INFO L124 PetriNetUnfolderBase]: 1914/3075 cut-off events. [2024-06-20 17:29:51,740 INFO L125 PetriNetUnfolderBase]: For 105865/105865 co-relation queries the response was YES. [2024-06-20 17:29:51,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17777 conditions, 3075 events. 1914/3075 cut-off events. For 105865/105865 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16884 event pairs, 557 based on Foata normal form. 8/3082 useless extension candidates. Maximal degree in co-relation 17712. Up to 2744 conditions per place. [2024-06-20 17:29:51,763 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 55 changer transitions 0/203 dead transitions. [2024-06-20 17:29:51,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 203 transitions, 2240 flow [2024-06-20 17:29:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:29:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:29:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 17:29:51,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:29:51,767 INFO L175 Difference]: Start difference. First operand has 142 places, 156 transitions, 1473 flow. Second operand 10 states and 170 transitions. [2024-06-20 17:29:51,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 203 transitions, 2240 flow [2024-06-20 17:29:51,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2163 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:51,858 INFO L231 Difference]: Finished difference. Result has 149 places, 168 transitions, 1708 flow [2024-06-20 17:29:51,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1708, PETRI_PLACES=149, PETRI_TRANSITIONS=168} [2024-06-20 17:29:51,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 17:29:51,868 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 168 transitions, 1708 flow [2024-06-20 17:29:51,868 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) [2024-06-20 17:29:51,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:51,868 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] [2024-06-20 17:29:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:29:51,868 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)] === [2024-06-20 17:29:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 979619947, now seen corresponding path program 3 times [2024-06-20 17:29:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537119158] [2024-06-20 17:29:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:54,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537119158] [2024-06-20 17:29:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537119158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:54,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:54,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554621403] [2024-06-20 17:29:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:54,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:54,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:54,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 168 transitions, 1708 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) [2024-06-20 17:29:54,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:54,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:54,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:55,465 INFO L124 PetriNetUnfolderBase]: 1890/3043 cut-off events. [2024-06-20 17:29:55,465 INFO L125 PetriNetUnfolderBase]: For 105945/105945 co-relation queries the response was YES. [2024-06-20 17:29:55,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17832 conditions, 3043 events. 1890/3043 cut-off events. For 105945/105945 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16722 event pairs, 539 based on Foata normal form. 8/3050 useless extension candidates. Maximal degree in co-relation 17765. Up to 2728 conditions per place. [2024-06-20 17:29:55,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 53 changer transitions 0/199 dead transitions. [2024-06-20 17:29:55,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 199 transitions, 2201 flow [2024-06-20 17:29:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:29:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:29:55,489 INFO L175 Difference]: Start difference. First operand has 149 places, 168 transitions, 1708 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:29:55,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 199 transitions, 2201 flow [2024-06-20 17:29:55,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 199 transitions, 2024 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:55,593 INFO L231 Difference]: Finished difference. Result has 151 places, 168 transitions, 1647 flow [2024-06-20 17:29:55,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1647, PETRI_PLACES=151, PETRI_TRANSITIONS=168} [2024-06-20 17:29:55,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-20 17:29:55,594 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 168 transitions, 1647 flow [2024-06-20 17:29:55,594 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) [2024-06-20 17:29:55,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:55,595 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] [2024-06-20 17:29:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:29:55,595 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)] === [2024-06-20 17:29:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -675075785, now seen corresponding path program 1 times [2024-06-20 17:29:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292547196] [2024-06-20 17:29:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292547196] [2024-06-20 17:29:59,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292547196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:59,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:59,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:59,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880462841] [2024-06-20 17:29:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:59,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:59,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:59,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 168 transitions, 1647 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) [2024-06-20 17:29:59,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:59,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:00,577 INFO L124 PetriNetUnfolderBase]: 1934/3111 cut-off events. [2024-06-20 17:30:00,577 INFO L125 PetriNetUnfolderBase]: For 113282/113282 co-relation queries the response was YES. [2024-06-20 17:30:00,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18178 conditions, 3111 events. 1934/3111 cut-off events. For 113282/113282 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17199 event pairs, 559 based on Foata normal form. 12/3122 useless extension candidates. Maximal degree in co-relation 18109. Up to 2820 conditions per place. [2024-06-20 17:30:00,602 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 38 changer transitions 0/202 dead transitions. [2024-06-20 17:30:00,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 202 transitions, 2204 flow [2024-06-20 17:30:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:30:00,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:30:00,613 INFO L175 Difference]: Start difference. First operand has 151 places, 168 transitions, 1647 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:30:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 202 transitions, 2204 flow [2024-06-20 17:30:00,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 202 transitions, 2098 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:00,710 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 1641 flow [2024-06-20 17:30:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1641, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2024-06-20 17:30:00,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 17:30:00,710 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 1641 flow [2024-06-20 17:30:00,710 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) [2024-06-20 17:30:00,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:00,711 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] [2024-06-20 17:30:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:30:00,711 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)] === [2024-06-20 17:30:00,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 544858103, now seen corresponding path program 4 times [2024-06-20 17:30:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779808337] [2024-06-20 17:30:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:03,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:03,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779808337] [2024-06-20 17:30:03,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779808337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:03,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:03,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:03,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286366807] [2024-06-20 17:30:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:03,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:03,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:03,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:03,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 1641 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) [2024-06-20 17:30:03,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:03,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:03,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:04,800 INFO L124 PetriNetUnfolderBase]: 1954/3150 cut-off events. [2024-06-20 17:30:04,801 INFO L125 PetriNetUnfolderBase]: For 111600/111600 co-relation queries the response was YES. [2024-06-20 17:30:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18468 conditions, 3150 events. 1954/3150 cut-off events. For 111600/111600 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17465 event pairs, 506 based on Foata normal form. 4/3151 useless extension candidates. Maximal degree in co-relation 18398. Up to 2649 conditions per place. [2024-06-20 17:30:04,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 66 changer transitions 0/204 dead transitions. [2024-06-20 17:30:04,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 204 transitions, 2335 flow [2024-06-20 17:30:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:30:04,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:30:04,827 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 1641 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:30:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 204 transitions, 2335 flow [2024-06-20 17:30:04,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 204 transitions, 2257 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:04,941 INFO L231 Difference]: Finished difference. Result has 154 places, 173 transitions, 1759 flow [2024-06-20 17:30:04,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=154, PETRI_TRANSITIONS=173} [2024-06-20 17:30:04,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 17:30:04,942 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 173 transitions, 1759 flow [2024-06-20 17:30:04,942 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) [2024-06-20 17:30:04,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:04,942 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] [2024-06-20 17:30:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:30:04,943 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)] === [2024-06-20 17:30:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 557238263, now seen corresponding path program 5 times [2024-06-20 17:30:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191127781] [2024-06-20 17:30:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:07,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191127781] [2024-06-20 17:30:07,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191127781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:07,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:07,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730294209] [2024-06-20 17:30:07,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:07,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:07,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 173 transitions, 1759 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) [2024-06-20 17:30:07,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:07,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:07,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:08,851 INFO L124 PetriNetUnfolderBase]: 1974/3177 cut-off events. [2024-06-20 17:30:08,856 INFO L125 PetriNetUnfolderBase]: For 116673/116673 co-relation queries the response was YES. [2024-06-20 17:30:08,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18882 conditions, 3177 events. 1974/3177 cut-off events. For 116673/116673 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17626 event pairs, 509 based on Foata normal form. 4/3180 useless extension candidates. Maximal degree in co-relation 18811. Up to 2936 conditions per place. [2024-06-20 17:30:08,880 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-20 17:30:08,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 201 transitions, 2256 flow [2024-06-20 17:30:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:30:08,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:30:08,884 INFO L175 Difference]: Start difference. First operand has 154 places, 173 transitions, 1759 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:30:08,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 201 transitions, 2256 flow [2024-06-20 17:30:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 201 transitions, 2119 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:08,971 INFO L231 Difference]: Finished difference. Result has 158 places, 176 transitions, 1735 flow [2024-06-20 17:30:08,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1735, PETRI_PLACES=158, PETRI_TRANSITIONS=176} [2024-06-20 17:30:08,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-20 17:30:08,972 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 176 transitions, 1735 flow [2024-06-20 17:30:08,972 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) [2024-06-20 17:30:08,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:08,972 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] [2024-06-20 17:30:08,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:30:08,973 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)] === [2024-06-20 17:30:08,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 556822553, now seen corresponding path program 6 times [2024-06-20 17:30:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:08,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218689405] [2024-06-20 17:30:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:11,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218689405] [2024-06-20 17:30:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218689405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:11,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118729750] [2024-06-20 17:30:11,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:11,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 176 transitions, 1735 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) [2024-06-20 17:30:11,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:11,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:13,145 INFO L124 PetriNetUnfolderBase]: 1994/3200 cut-off events. [2024-06-20 17:30:13,145 INFO L125 PetriNetUnfolderBase]: For 121576/121576 co-relation queries the response was YES. [2024-06-20 17:30:13,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18895 conditions, 3200 events. 1994/3200 cut-off events. For 121576/121576 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17743 event pairs, 510 based on Foata normal form. 4/3201 useless extension candidates. Maximal degree in co-relation 18822. Up to 2681 conditions per place. [2024-06-20 17:30:13,169 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 71 changer transitions 0/206 dead transitions. [2024-06-20 17:30:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 206 transitions, 2335 flow [2024-06-20 17:30:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:30:13,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:30:13,171 INFO L175 Difference]: Start difference. First operand has 158 places, 176 transitions, 1735 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:30:13,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 206 transitions, 2335 flow [2024-06-20 17:30:13,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 206 transitions, 2247 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:13,271 INFO L231 Difference]: Finished difference. Result has 160 places, 179 transitions, 1845 flow [2024-06-20 17:30:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1845, PETRI_PLACES=160, PETRI_TRANSITIONS=179} [2024-06-20 17:30:13,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 17:30:13,271 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 179 transitions, 1845 flow [2024-06-20 17:30:13,272 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) [2024-06-20 17:30:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:13,272 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] [2024-06-20 17:30:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:30:13,272 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)] === [2024-06-20 17:30:13,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 686659191, now seen corresponding path program 7 times [2024-06-20 17:30:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192639121] [2024-06-20 17:30:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:15,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192639121] [2024-06-20 17:30:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192639121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569530756] [2024-06-20 17:30:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:15,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:15,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 179 transitions, 1845 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) [2024-06-20 17:30:15,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:15,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:15,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:16,939 INFO L124 PetriNetUnfolderBase]: 2046/3261 cut-off events. [2024-06-20 17:30:16,939 INFO L125 PetriNetUnfolderBase]: For 131969/131969 co-relation queries the response was YES. [2024-06-20 17:30:16,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19789 conditions, 3261 events. 2046/3261 cut-off events. For 131969/131969 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18039 event pairs, 580 based on Foata normal form. 4/3260 useless extension candidates. Maximal degree in co-relation 19715. Up to 2798 conditions per place. [2024-06-20 17:30:16,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 129 selfloop transitions, 73 changer transitions 0/207 dead transitions. [2024-06-20 17:30:16,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 207 transitions, 2585 flow [2024-06-20 17:30:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:30:16,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:30:16,969 INFO L175 Difference]: Start difference. First operand has 160 places, 179 transitions, 1845 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:30:16,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 207 transitions, 2585 flow [2024-06-20 17:30:17,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 207 transitions, 2450 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:17,093 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 2019 flow [2024-06-20 17:30:17,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2019, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-20 17:30:17,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 17:30:17,094 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 2019 flow [2024-06-20 17:30:17,094 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) [2024-06-20 17:30:17,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:17,094 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] [2024-06-20 17:30:17,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:30:17,094 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)] === [2024-06-20 17:30:17,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash 797275437, now seen corresponding path program 8 times [2024-06-20 17:30:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191637886] [2024-06-20 17:30:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:19,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191637886] [2024-06-20 17:30:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191637886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:19,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346706175] [2024-06-20 17:30:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:19,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:19,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 2019 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) [2024-06-20 17:30:19,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:19,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:19,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:20,953 INFO L124 PetriNetUnfolderBase]: 2086/3337 cut-off events. [2024-06-20 17:30:20,954 INFO L125 PetriNetUnfolderBase]: For 140436/140436 co-relation queries the response was YES. [2024-06-20 17:30:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20682 conditions, 3337 events. 2086/3337 cut-off events. For 140436/140436 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18571 event pairs, 572 based on Foata normal form. 4/3340 useless extension candidates. Maximal degree in co-relation 20606. Up to 3126 conditions per place. [2024-06-20 17:30:20,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 22 changer transitions 0/211 dead transitions. [2024-06-20 17:30:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2574 flow [2024-06-20 17:30:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:30:20,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:30:20,980 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 2019 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:30:20,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2574 flow [2024-06-20 17:30:21,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 211 transitions, 2342 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:21,101 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 1942 flow [2024-06-20 17:30:21,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1942, PETRI_PLACES=166, PETRI_TRANSITIONS=191} [2024-06-20 17:30:21,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 17:30:21,102 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 1942 flow [2024-06-20 17:30:21,102 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) [2024-06-20 17:30:21,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:21,102 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] [2024-06-20 17:30:21,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:30:21,102 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)] === [2024-06-20 17:30:21,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -158340383, now seen corresponding path program 9 times [2024-06-20 17:30:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7904277] [2024-06-20 17:30:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7904277] [2024-06-20 17:30:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7904277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:24,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:24,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723382866] [2024-06-20 17:30:24,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:24,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:24,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 1942 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) [2024-06-20 17:30:24,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:24,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:25,755 INFO L124 PetriNetUnfolderBase]: 2106/3365 cut-off events. [2024-06-20 17:30:25,756 INFO L125 PetriNetUnfolderBase]: For 143241/143241 co-relation queries the response was YES. [2024-06-20 17:30:25,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20509 conditions, 3365 events. 2106/3365 cut-off events. For 143241/143241 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 18684 event pairs, 582 based on Foata normal form. 4/3368 useless extension candidates. Maximal degree in co-relation 20432. Up to 3102 conditions per place. [2024-06-20 17:30:25,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 32 changer transitions 0/225 dead transitions. [2024-06-20 17:30:25,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 225 transitions, 2594 flow [2024-06-20 17:30:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:30:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:30:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-20 17:30:25,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35912698412698413 [2024-06-20 17:30:25,781 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 1942 flow. Second operand 12 states and 181 transitions. [2024-06-20 17:30:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 225 transitions, 2594 flow [2024-06-20 17:30:25,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 2504 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:25,933 INFO L231 Difference]: Finished difference. Result has 175 places, 195 transitions, 1996 flow [2024-06-20 17:30:25,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1996, PETRI_PLACES=175, PETRI_TRANSITIONS=195} [2024-06-20 17:30:25,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 17:30:25,934 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 195 transitions, 1996 flow [2024-06-20 17:30:25,934 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) [2024-06-20 17:30:25,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:25,934 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] [2024-06-20 17:30:25,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:30:25,934 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)] === [2024-06-20 17:30:25,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 590817297, now seen corresponding path program 10 times [2024-06-20 17:30:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:25,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575145892] [2024-06-20 17:30:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:25,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:28,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575145892] [2024-06-20 17:30:28,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575145892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:28,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:28,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:28,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769414764] [2024-06-20 17:30:28,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:28,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:28,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:28,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 195 transitions, 1996 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) [2024-06-20 17:30:28,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:28,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:28,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:30,016 INFO L124 PetriNetUnfolderBase]: 2178/3459 cut-off events. [2024-06-20 17:30:30,016 INFO L125 PetriNetUnfolderBase]: For 158748/158748 co-relation queries the response was YES. [2024-06-20 17:30:30,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21404 conditions, 3459 events. 2178/3459 cut-off events. For 158748/158748 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19223 event pairs, 580 based on Foata normal form. 8/3462 useless extension candidates. Maximal degree in co-relation 21324. Up to 2894 conditions per place. [2024-06-20 17:30:30,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 97 changer transitions 0/235 dead transitions. [2024-06-20 17:30:30,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 235 transitions, 2876 flow [2024-06-20 17:30:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:30:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:30:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 17:30:30,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 17:30:30,058 INFO L175 Difference]: Start difference. First operand has 175 places, 195 transitions, 1996 flow. Second operand 11 states and 183 transitions. [2024-06-20 17:30:30,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 235 transitions, 2876 flow [2024-06-20 17:30:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 235 transitions, 2704 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-20 17:30:30,207 INFO L231 Difference]: Finished difference. Result has 173 places, 204 transitions, 2170 flow [2024-06-20 17:30:30,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2170, PETRI_PLACES=173, PETRI_TRANSITIONS=204} [2024-06-20 17:30:30,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-20 17:30:30,208 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 204 transitions, 2170 flow [2024-06-20 17:30:30,208 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) [2024-06-20 17:30:30,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:30,208 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] [2024-06-20 17:30:30,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:30:30,209 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)] === [2024-06-20 17:30:30,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2047144585, now seen corresponding path program 11 times [2024-06-20 17:30:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:30,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772748724] [2024-06-20 17:30:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:30,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:33,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772748724] [2024-06-20 17:30:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772748724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:33,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:33,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872569265] [2024-06-20 17:30:33,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:33,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:33,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:33,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 204 transitions, 2170 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) [2024-06-20 17:30:33,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:33,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:34,638 INFO L124 PetriNetUnfolderBase]: 2166/3449 cut-off events. [2024-06-20 17:30:34,638 INFO L125 PetriNetUnfolderBase]: For 154691/154691 co-relation queries the response was YES. [2024-06-20 17:30:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 3449 events. 2166/3449 cut-off events. For 154691/154691 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19164 event pairs, 592 based on Foata normal form. 4/3452 useless extension candidates. Maximal degree in co-relation 21302. Up to 3194 conditions per place. [2024-06-20 17:30:34,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 32 changer transitions 0/227 dead transitions. [2024-06-20 17:30:34,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 227 transitions, 2664 flow [2024-06-20 17:30:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:30:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:30:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-20 17:30:34,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-20 17:30:34,670 INFO L175 Difference]: Start difference. First operand has 173 places, 204 transitions, 2170 flow. Second operand 10 states and 152 transitions. [2024-06-20 17:30:34,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 227 transitions, 2664 flow [2024-06-20 17:30:34,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 227 transitions, 2398 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-20 17:30:34,907 INFO L231 Difference]: Finished difference. Result has 175 places, 204 transitions, 1974 flow [2024-06-20 17:30:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1904, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1974, PETRI_PLACES=175, PETRI_TRANSITIONS=204} [2024-06-20 17:30:34,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 17:30:34,918 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 204 transitions, 1974 flow [2024-06-20 17:30:34,918 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) [2024-06-20 17:30:34,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:34,919 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] [2024-06-20 17:30:34,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:30:34,919 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)] === [2024-06-20 17:30:34,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash 469073945, now seen corresponding path program 12 times [2024-06-20 17:30:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657063935] [2024-06-20 17:30:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:37,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657063935] [2024-06-20 17:30:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657063935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:37,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967712811] [2024-06-20 17:30:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:37,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:37,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 204 transitions, 1974 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) [2024-06-20 17:30:37,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:37,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:37,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:38,889 INFO L124 PetriNetUnfolderBase]: 2142/3413 cut-off events. [2024-06-20 17:30:38,889 INFO L125 PetriNetUnfolderBase]: For 153078/153078 co-relation queries the response was YES. [2024-06-20 17:30:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20351 conditions, 3413 events. 2142/3413 cut-off events. For 153078/153078 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18996 event pairs, 574 based on Foata normal form. 8/3416 useless extension candidates. Maximal degree in co-relation 20272. Up to 2870 conditions per place. [2024-06-20 17:30:38,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 94 changer transitions 0/232 dead transitions. [2024-06-20 17:30:38,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 232 transitions, 2608 flow [2024-06-20 17:30:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:30:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:30:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:30:38,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:30:38,919 INFO L175 Difference]: Start difference. First operand has 175 places, 204 transitions, 1974 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:30:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 232 transitions, 2608 flow [2024-06-20 17:30:39,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 2510 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 17:30:39,107 INFO L231 Difference]: Finished difference. Result has 176 places, 204 transitions, 2074 flow [2024-06-20 17:30:39,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2074, PETRI_PLACES=176, PETRI_TRANSITIONS=204} [2024-06-20 17:30:39,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 17:30:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 204 transitions, 2074 flow [2024-06-20 17:30:39,108 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) [2024-06-20 17:30:39,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:39,108 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] [2024-06-20 17:30:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:30:39,108 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)] === [2024-06-20 17:30:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1004132113, now seen corresponding path program 2 times [2024-06-20 17:30:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:39,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373308866] [2024-06-20 17:30:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:42,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373308866] [2024-06-20 17:30:42,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373308866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:42,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:42,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178207488] [2024-06-20 17:30:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:42,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:42,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:42,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 204 transitions, 2074 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) [2024-06-20 17:30:42,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:42,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:42,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:43,916 INFO L124 PetriNetUnfolderBase]: 2186/3491 cut-off events. [2024-06-20 17:30:43,917 INFO L125 PetriNetUnfolderBase]: For 164991/164991 co-relation queries the response was YES. [2024-06-20 17:30:43,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21076 conditions, 3491 events. 2186/3491 cut-off events. For 164991/164991 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19579 event pairs, 606 based on Foata normal form. 12/3502 useless extension candidates. Maximal degree in co-relation 20996. Up to 3264 conditions per place. [2024-06-20 17:30:43,945 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 17 changer transitions 0/226 dead transitions. [2024-06-20 17:30:43,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 226 transitions, 2622 flow [2024-06-20 17:30:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:30:43,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:30:43,947 INFO L175 Difference]: Start difference. First operand has 176 places, 204 transitions, 2074 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:30:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 226 transitions, 2622 flow [2024-06-20 17:30:44,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 226 transitions, 2396 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:30:44,222 INFO L231 Difference]: Finished difference. Result has 175 places, 205 transitions, 1908 flow [2024-06-20 17:30:44,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1908, PETRI_PLACES=175, PETRI_TRANSITIONS=205} [2024-06-20 17:30:44,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 17:30:44,223 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 205 transitions, 1908 flow [2024-06-20 17:30:44,223 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) [2024-06-20 17:30:44,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:44,223 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] [2024-06-20 17:30:44,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:30:44,224 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)] === [2024-06-20 17:30:44,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2124979225, now seen corresponding path program 3 times [2024-06-20 17:30:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:44,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250731855] [2024-06-20 17:30:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:47,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:47,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250731855] [2024-06-20 17:30:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250731855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:47,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:47,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124934364] [2024-06-20 17:30:47,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:47,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:47,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 205 transitions, 1908 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) [2024-06-20 17:30:47,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:47,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:47,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:49,305 INFO L124 PetriNetUnfolderBase]: 2230/3555 cut-off events. [2024-06-20 17:30:49,305 INFO L125 PetriNetUnfolderBase]: For 170906/170906 co-relation queries the response was YES. [2024-06-20 17:30:49,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21327 conditions, 3555 events. 2230/3555 cut-off events. For 170906/170906 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20020 event pairs, 620 based on Foata normal form. 12/3562 useless extension candidates. Maximal degree in co-relation 21246. Up to 3248 conditions per place. [2024-06-20 17:30:49,331 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 38 changer transitions 0/230 dead transitions. [2024-06-20 17:30:49,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 2492 flow [2024-06-20 17:30:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:30:49,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:30:49,332 INFO L175 Difference]: Start difference. First operand has 175 places, 205 transitions, 1908 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:30:49,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 2492 flow [2024-06-20 17:30:49,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 230 transitions, 2454 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:49,542 INFO L231 Difference]: Finished difference. Result has 177 places, 206 transitions, 1974 flow [2024-06-20 17:30:49,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1974, PETRI_PLACES=177, PETRI_TRANSITIONS=206} [2024-06-20 17:30:49,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 17:30:49,543 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 206 transitions, 1974 flow [2024-06-20 17:30:49,543 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) [2024-06-20 17:30:49,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:49,543 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] [2024-06-20 17:30:49,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:30:49,544 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)] === [2024-06-20 17:30:49,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 602861293, now seen corresponding path program 4 times [2024-06-20 17:30:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075936213] [2024-06-20 17:30:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075936213] [2024-06-20 17:30:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075936213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:53,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301503850] [2024-06-20 17:30:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:53,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 206 transitions, 1974 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) [2024-06-20 17:30:53,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:53,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:53,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:54,345 INFO L124 PetriNetUnfolderBase]: 2232/3573 cut-off events. [2024-06-20 17:30:54,345 INFO L125 PetriNetUnfolderBase]: For 164566/164566 co-relation queries the response was YES. [2024-06-20 17:30:54,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3573 events. 2232/3573 cut-off events. For 164566/164566 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20123 event pairs, 604 based on Foata normal form. 8/3580 useless extension candidates. Maximal degree in co-relation 21208. Up to 3300 conditions per place. [2024-06-20 17:30:54,372 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 20 changer transitions 0/233 dead transitions. [2024-06-20 17:30:54,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 233 transitions, 2580 flow [2024-06-20 17:30:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:30:54,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:30:54,374 INFO L175 Difference]: Start difference. First operand has 177 places, 206 transitions, 1974 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:30:54,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 233 transitions, 2580 flow [2024-06-20 17:30:54,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 233 transitions, 2498 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:54,554 INFO L231 Difference]: Finished difference. Result has 180 places, 207 transitions, 1960 flow [2024-06-20 17:30:54,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1960, PETRI_PLACES=180, PETRI_TRANSITIONS=207} [2024-06-20 17:30:54,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 17:30:54,554 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 207 transitions, 1960 flow [2024-06-20 17:30:54,555 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) [2024-06-20 17:30:54,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:54,555 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] [2024-06-20 17:30:54,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:30:54,555 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)] === [2024-06-20 17:30:54,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1004614287, now seen corresponding path program 1 times [2024-06-20 17:30:54,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:54,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739714659] [2024-06-20 17:30:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:54,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:57,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739714659] [2024-06-20 17:30:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739714659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:57,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:57,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:57,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969179559] [2024-06-20 17:30:57,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:57,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:58,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:58,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 207 transitions, 1960 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) [2024-06-20 17:30:58,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:58,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:58,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:59,316 INFO L124 PetriNetUnfolderBase]: 2242/3579 cut-off events. [2024-06-20 17:30:59,316 INFO L125 PetriNetUnfolderBase]: For 158668/158668 co-relation queries the response was YES. [2024-06-20 17:30:59,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3579 events. 2242/3579 cut-off events. For 158668/158668 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20042 event pairs, 582 based on Foata normal form. 8/3586 useless extension candidates. Maximal degree in co-relation 20818. Up to 3288 conditions per place. [2024-06-20 17:30:59,345 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-20 17:30:59,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 2553 flow [2024-06-20 17:30:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:30:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:30:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-20 17:30:59,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:30:59,360 INFO L175 Difference]: Start difference. First operand has 180 places, 207 transitions, 1960 flow. Second operand 10 states and 154 transitions. [2024-06-20 17:30:59,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 2553 flow [2024-06-20 17:30:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 237 transitions, 2501 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:59,562 INFO L231 Difference]: Finished difference. Result has 184 places, 208 transitions, 1981 flow [2024-06-20 17:30:59,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1981, PETRI_PLACES=184, PETRI_TRANSITIONS=208} [2024-06-20 17:30:59,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 17:30:59,562 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 208 transitions, 1981 flow [2024-06-20 17:30:59,562 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) [2024-06-20 17:30:59,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:59,563 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] [2024-06-20 17:30:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:30:59,563 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)] === [2024-06-20 17:30:59,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash -270807007, now seen corresponding path program 1 times [2024-06-20 17:30:59,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:59,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096555725] [2024-06-20 17:30:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:02,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096555725] [2024-06-20 17:31:02,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096555725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:02,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:02,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:02,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539444581] [2024-06-20 17:31:02,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:02,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:02,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:02,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 208 transitions, 1981 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) [2024-06-20 17:31:02,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:02,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:02,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:04,293 INFO L124 PetriNetUnfolderBase]: 2250/3603 cut-off events. [2024-06-20 17:31:04,293 INFO L125 PetriNetUnfolderBase]: For 154977/154977 co-relation queries the response was YES. [2024-06-20 17:31:04,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21073 conditions, 3603 events. 2250/3603 cut-off events. For 154977/154977 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20166 event pairs, 549 based on Foata normal form. 2/3604 useless extension candidates. Maximal degree in co-relation 20988. Up to 3333 conditions per place. [2024-06-20 17:31:04,318 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 28 changer transitions 0/248 dead transitions. [2024-06-20 17:31:04,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 248 transitions, 2731 flow [2024-06-20 17:31:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:31:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:31:04,320 INFO L175 Difference]: Start difference. First operand has 184 places, 208 transitions, 1981 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:31:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 248 transitions, 2731 flow [2024-06-20 17:31:04,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 248 transitions, 2667 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:04,518 INFO L231 Difference]: Finished difference. Result has 184 places, 212 transitions, 2050 flow [2024-06-20 17:31:04,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2050, PETRI_PLACES=184, PETRI_TRANSITIONS=212} [2024-06-20 17:31:04,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 17:31:04,519 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 212 transitions, 2050 flow [2024-06-20 17:31:04,519 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) [2024-06-20 17:31:04,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:04,519 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] [2024-06-20 17:31:04,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:31:04,520 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)] === [2024-06-20 17:31:04,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash -270597757, now seen corresponding path program 2 times [2024-06-20 17:31:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:04,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445951635] [2024-06-20 17:31:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:07,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445951635] [2024-06-20 17:31:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445951635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:07,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:07,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802886187] [2024-06-20 17:31:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:07,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:07,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 212 transitions, 2050 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) [2024-06-20 17:31:07,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:07,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:07,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:08,859 INFO L124 PetriNetUnfolderBase]: 2263/3624 cut-off events. [2024-06-20 17:31:08,860 INFO L125 PetriNetUnfolderBase]: For 160138/160138 co-relation queries the response was YES. [2024-06-20 17:31:08,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21153 conditions, 3624 events. 2263/3624 cut-off events. For 160138/160138 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20490 event pairs, 647 based on Foata normal form. 2/3625 useless extension candidates. Maximal degree in co-relation 21068. Up to 3402 conditions per place. [2024-06-20 17:31:08,890 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 214 selfloop transitions, 28 changer transitions 0/247 dead transitions. [2024-06-20 17:31:08,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 247 transitions, 2677 flow [2024-06-20 17:31:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:31:08,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:31:08,892 INFO L175 Difference]: Start difference. First operand has 184 places, 212 transitions, 2050 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:31:08,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 247 transitions, 2677 flow [2024-06-20 17:31:09,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 247 transitions, 2554 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:09,143 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2063 flow [2024-06-20 17:31:09,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2063, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-20 17:31:09,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 17:31:09,143 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2063 flow [2024-06-20 17:31:09,144 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) [2024-06-20 17:31:09,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:09,144 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] [2024-06-20 17:31:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:31:09,144 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)] === [2024-06-20 17:31:09,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash 997367939, now seen corresponding path program 1 times [2024-06-20 17:31:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:09,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132941118] [2024-06-20 17:31:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:11,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:11,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132941118] [2024-06-20 17:31:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132941118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:11,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196947859] [2024-06-20 17:31:11,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:11,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:11,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:11,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2063 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) [2024-06-20 17:31:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:11,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:13,313 INFO L124 PetriNetUnfolderBase]: 2273/3638 cut-off events. [2024-06-20 17:31:13,313 INFO L125 PetriNetUnfolderBase]: For 164928/164928 co-relation queries the response was YES. [2024-06-20 17:31:13,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21241 conditions, 3638 events. 2273/3638 cut-off events. For 164928/164928 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20530 event pairs, 639 based on Foata normal form. 2/3639 useless extension candidates. Maximal degree in co-relation 21156. Up to 3378 conditions per place. [2024-06-20 17:31:13,342 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 37 changer transitions 0/255 dead transitions. [2024-06-20 17:31:13,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 255 transitions, 2703 flow [2024-06-20 17:31:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:31:13,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:31:13,344 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2063 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:31:13,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 255 transitions, 2703 flow [2024-06-20 17:31:13,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 255 transitions, 2630 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:13,611 INFO L231 Difference]: Finished difference. Result has 190 places, 220 transitions, 2132 flow [2024-06-20 17:31:13,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2132, PETRI_PLACES=190, PETRI_TRANSITIONS=220} [2024-06-20 17:31:13,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 17:31:13,611 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 220 transitions, 2132 flow [2024-06-20 17:31:13,612 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) [2024-06-20 17:31:13,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:13,612 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] [2024-06-20 17:31:13,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:31:13,612 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)] === [2024-06-20 17:31:13,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -4900477, now seen corresponding path program 3 times [2024-06-20 17:31:13,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981904599] [2024-06-20 17:31:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:16,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:16,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981904599] [2024-06-20 17:31:16,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981904599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:16,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:16,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161450648] [2024-06-20 17:31:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:16,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:16,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:16,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 220 transitions, 2132 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) [2024-06-20 17:31:16,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:16,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:16,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:18,183 INFO L124 PetriNetUnfolderBase]: 2281/3654 cut-off events. [2024-06-20 17:31:18,185 INFO L125 PetriNetUnfolderBase]: For 171802/171802 co-relation queries the response was YES. [2024-06-20 17:31:18,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21743 conditions, 3654 events. 2281/3654 cut-off events. For 171802/171802 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20677 event pairs, 649 based on Foata normal form. 2/3655 useless extension candidates. Maximal degree in co-relation 21657. Up to 3428 conditions per place. [2024-06-20 17:31:18,217 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 212 selfloop transitions, 28 changer transitions 0/245 dead transitions. [2024-06-20 17:31:18,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 245 transitions, 2711 flow [2024-06-20 17:31:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:31:18,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:31:18,219 INFO L175 Difference]: Start difference. First operand has 190 places, 220 transitions, 2132 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:31:18,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 245 transitions, 2711 flow [2024-06-20 17:31:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 245 transitions, 2594 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:18,479 INFO L231 Difference]: Finished difference. Result has 194 places, 223 transitions, 2137 flow [2024-06-20 17:31:18,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=194, PETRI_TRANSITIONS=223} [2024-06-20 17:31:18,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 17:31:18,480 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 223 transitions, 2137 flow [2024-06-20 17:31:18,480 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) [2024-06-20 17:31:18,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:18,480 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] [2024-06-20 17:31:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:31:18,481 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)] === [2024-06-20 17:31:18,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 12983233, now seen corresponding path program 2 times [2024-06-20 17:31:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824726760] [2024-06-20 17:31:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824726760] [2024-06-20 17:31:21,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824726760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:21,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:21,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:21,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596282800] [2024-06-20 17:31:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:21,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:21,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:21,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:21,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 223 transitions, 2137 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) [2024-06-20 17:31:21,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:21,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:21,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:22,624 INFO L124 PetriNetUnfolderBase]: 2307/3708 cut-off events. [2024-06-20 17:31:22,624 INFO L125 PetriNetUnfolderBase]: For 181438/181440 co-relation queries the response was YES. [2024-06-20 17:31:22,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22169 conditions, 3708 events. 2307/3708 cut-off events. For 181438/181440 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20999 event pairs, 526 based on Foata normal form. 4/3711 useless extension candidates. Maximal degree in co-relation 22081. Up to 3190 conditions per place. [2024-06-20 17:31:22,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 72 changer transitions 0/268 dead transitions. [2024-06-20 17:31:22,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 268 transitions, 3169 flow [2024-06-20 17:31:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:31:22,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:31:22,660 INFO L175 Difference]: Start difference. First operand has 194 places, 223 transitions, 2137 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:31:22,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 268 transitions, 3169 flow [2024-06-20 17:31:22,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 268 transitions, 3090 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:22,884 INFO L231 Difference]: Finished difference. Result has 197 places, 232 transitions, 2400 flow [2024-06-20 17:31:22,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2400, PETRI_PLACES=197, PETRI_TRANSITIONS=232} [2024-06-20 17:31:22,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-20 17:31:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 232 transitions, 2400 flow [2024-06-20 17:31:22,885 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) [2024-06-20 17:31:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:22,885 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] [2024-06-20 17:31:22,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:31:22,885 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)] === [2024-06-20 17:31:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 22506433, now seen corresponding path program 3 times [2024-06-20 17:31:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612315176] [2024-06-20 17:31:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612315176] [2024-06-20 17:31:25,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612315176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:25,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:25,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:25,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740612697] [2024-06-20 17:31:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:25,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:25,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:25,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:25,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:25,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 232 transitions, 2400 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) [2024-06-20 17:31:25,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:25,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:25,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:27,131 INFO L124 PetriNetUnfolderBase]: 2317/3720 cut-off events. [2024-06-20 17:31:27,131 INFO L125 PetriNetUnfolderBase]: For 189868/189870 co-relation queries the response was YES. [2024-06-20 17:31:27,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22858 conditions, 3720 events. 2317/3720 cut-off events. For 189868/189870 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21113 event pairs, 531 based on Foata normal form. 4/3723 useless extension candidates. Maximal degree in co-relation 22769. Up to 3200 conditions per place. [2024-06-20 17:31:27,159 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-20 17:31:27,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 267 transitions, 3306 flow [2024-06-20 17:31:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:31:27,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:31:27,161 INFO L175 Difference]: Start difference. First operand has 197 places, 232 transitions, 2400 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:31:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 267 transitions, 3306 flow [2024-06-20 17:31:27,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 267 transitions, 3149 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 17:31:27,429 INFO L231 Difference]: Finished difference. Result has 202 places, 235 transitions, 2465 flow [2024-06-20 17:31:27,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2465, PETRI_PLACES=202, PETRI_TRANSITIONS=235} [2024-06-20 17:31:27,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 17:31:27,430 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 235 transitions, 2465 flow [2024-06-20 17:31:27,430 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) [2024-06-20 17:31:27,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:27,430 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] [2024-06-20 17:31:27,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:31:27,430 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)] === [2024-06-20 17:31:27,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash 540801491, now seen corresponding path program 4 times [2024-06-20 17:31:27,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:27,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004741184] [2024-06-20 17:31:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:27,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:30,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004741184] [2024-06-20 17:31:30,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004741184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:30,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:30,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442092828] [2024-06-20 17:31:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:30,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:30,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 235 transitions, 2465 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) [2024-06-20 17:31:30,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:30,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:30,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:31,612 INFO L124 PetriNetUnfolderBase]: 2327/3730 cut-off events. [2024-06-20 17:31:31,612 INFO L125 PetriNetUnfolderBase]: For 195044/195044 co-relation queries the response was YES. [2024-06-20 17:31:31,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23128 conditions, 3730 events. 2327/3730 cut-off events. For 195044/195044 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21250 event pairs, 652 based on Foata normal form. 2/3731 useless extension candidates. Maximal degree in co-relation 23037. Up to 3476 conditions per place. [2024-06-20 17:31:31,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 34 changer transitions 0/261 dead transitions. [2024-06-20 17:31:31,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 261 transitions, 3079 flow [2024-06-20 17:31:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:31:31,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:31:31,648 INFO L175 Difference]: Start difference. First operand has 202 places, 235 transitions, 2465 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:31:31,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 261 transitions, 3079 flow [2024-06-20 17:31:31,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 261 transitions, 2963 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:31:31,878 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2477 flow [2024-06-20 17:31:31,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-20 17:31:31,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 17:31:31,878 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2477 flow [2024-06-20 17:31:31,879 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) [2024-06-20 17:31:31,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:31,879 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] [2024-06-20 17:31:31,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:31:31,879 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)] === [2024-06-20 17:31:31,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2011843989, now seen corresponding path program 1 times [2024-06-20 17:31:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:31,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350341357] [2024-06-20 17:31:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:34,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:34,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350341357] [2024-06-20 17:31:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350341357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:34,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137796320] [2024-06-20 17:31:34,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:34,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:34,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2477 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) [2024-06-20 17:31:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:36,302 INFO L124 PetriNetUnfolderBase]: 2348/3769 cut-off events. [2024-06-20 17:31:36,302 INFO L125 PetriNetUnfolderBase]: For 205138/205140 co-relation queries the response was YES. [2024-06-20 17:31:36,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23374 conditions, 3769 events. 2348/3769 cut-off events. For 205138/205140 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21465 event pairs, 549 based on Foata normal form. 4/3772 useless extension candidates. Maximal degree in co-relation 23282. Up to 3384 conditions per place. [2024-06-20 17:31:36,338 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 49 changer transitions 0/277 dead transitions. [2024-06-20 17:31:36,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 277 transitions, 3287 flow [2024-06-20 17:31:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:31:36,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:31:36,342 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2477 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:31:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 277 transitions, 3287 flow [2024-06-20 17:31:36,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 277 transitions, 3193 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:36,583 INFO L231 Difference]: Finished difference. Result has 208 places, 242 transitions, 2550 flow [2024-06-20 17:31:36,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2550, PETRI_PLACES=208, PETRI_TRANSITIONS=242} [2024-06-20 17:31:36,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-20 17:31:36,584 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 242 transitions, 2550 flow [2024-06-20 17:31:36,584 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) [2024-06-20 17:31:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:36,585 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] [2024-06-20 17:31:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:31:36,585 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)] === [2024-06-20 17:31:36,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash 259762811, now seen corresponding path program 2 times [2024-06-20 17:31:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960375659] [2024-06-20 17:31:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:36,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960375659] [2024-06-20 17:31:39,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960375659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:39,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:39,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908324687] [2024-06-20 17:31:39,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:39,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:40,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:40,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 242 transitions, 2550 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) [2024-06-20 17:31:40,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:40,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:40,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:41,443 INFO L124 PetriNetUnfolderBase]: 2356/3787 cut-off events. [2024-06-20 17:31:41,443 INFO L125 PetriNetUnfolderBase]: For 211525/211527 co-relation queries the response was YES. [2024-06-20 17:31:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23735 conditions, 3787 events. 2356/3787 cut-off events. For 211525/211527 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21593 event pairs, 557 based on Foata normal form. 4/3790 useless extension candidates. Maximal degree in co-relation 23642. Up to 3433 conditions per place. [2024-06-20 17:31:41,481 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-20 17:31:41,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 3192 flow [2024-06-20 17:31:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:31:41,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:31:41,483 INFO L175 Difference]: Start difference. First operand has 208 places, 242 transitions, 2550 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:31:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 3192 flow [2024-06-20 17:31:41,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 274 transitions, 3086 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:31:41,792 INFO L231 Difference]: Finished difference. Result has 212 places, 244 transitions, 2579 flow [2024-06-20 17:31:41,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2579, PETRI_PLACES=212, PETRI_TRANSITIONS=244} [2024-06-20 17:31:41,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 17:31:41,793 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 244 transitions, 2579 flow [2024-06-20 17:31:41,793 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) [2024-06-20 17:31:41,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:41,793 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] [2024-06-20 17:31:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:31:41,793 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)] === [2024-06-20 17:31:41,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash 540808435, now seen corresponding path program 3 times [2024-06-20 17:31:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894410466] [2024-06-20 17:31:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:45,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894410466] [2024-06-20 17:31:45,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894410466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:45,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:45,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:45,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798338050] [2024-06-20 17:31:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:45,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 244 transitions, 2579 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) [2024-06-20 17:31:45,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:45,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:45,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:46,457 INFO L124 PetriNetUnfolderBase]: 2400/3839 cut-off events. [2024-06-20 17:31:46,458 INFO L125 PetriNetUnfolderBase]: For 238509/238509 co-relation queries the response was YES. [2024-06-20 17:31:46,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24289 conditions, 3839 events. 2400/3839 cut-off events. For 238509/238509 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21907 event pairs, 657 based on Foata normal form. 12/3850 useless extension candidates. Maximal degree in co-relation 24194. Up to 3547 conditions per place. [2024-06-20 17:31:46,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 34 changer transitions 0/274 dead transitions. [2024-06-20 17:31:46,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 3269 flow [2024-06-20 17:31:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:31:46,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:31:46,561 INFO L175 Difference]: Start difference. First operand has 212 places, 244 transitions, 2579 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:31:46,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 3269 flow [2024-06-20 17:31:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 274 transitions, 3168 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:46,922 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 2602 flow [2024-06-20 17:31:46,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2602, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2024-06-20 17:31:46,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-20 17:31:46,923 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 2602 flow [2024-06-20 17:31:46,923 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) [2024-06-20 17:31:46,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:46,923 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] [2024-06-20 17:31:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:31:46,924 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)] === [2024-06-20 17:31:46,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1990501269, now seen corresponding path program 4 times [2024-06-20 17:31:46,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:46,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841386369] [2024-06-20 17:31:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:50,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841386369] [2024-06-20 17:31:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841386369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:50,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:50,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651108998] [2024-06-20 17:31:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:50,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:50,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 2602 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) [2024-06-20 17:31:50,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:50,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:50,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:51,711 INFO L124 PetriNetUnfolderBase]: 2395/3820 cut-off events. [2024-06-20 17:31:51,711 INFO L125 PetriNetUnfolderBase]: For 220140/220140 co-relation queries the response was YES. [2024-06-20 17:31:51,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24192 conditions, 3820 events. 2395/3820 cut-off events. For 220140/220140 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21805 event pairs, 683 based on Foata normal form. 2/3817 useless extension candidates. Maximal degree in co-relation 24096. Up to 3596 conditions per place. [2024-06-20 17:31:51,748 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 28 changer transitions 0/261 dead transitions. [2024-06-20 17:31:51,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 261 transitions, 3146 flow [2024-06-20 17:31:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:31:51,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-20 17:31:51,750 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 2602 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:31:51,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 261 transitions, 3146 flow [2024-06-20 17:31:52,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 261 transitions, 3052 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:52,161 INFO L231 Difference]: Finished difference. Result has 216 places, 247 transitions, 2569 flow [2024-06-20 17:31:52,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=216, PETRI_TRANSITIONS=247} [2024-06-20 17:31:52,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 17:31:52,161 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 247 transitions, 2569 flow [2024-06-20 17:31:52,162 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) [2024-06-20 17:31:52,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:52,162 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] [2024-06-20 17:31:52,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:31:52,162 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)] === [2024-06-20 17:31:52,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1893507593, now seen corresponding path program 5 times [2024-06-20 17:31:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:52,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010446442] [2024-06-20 17:31:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:52,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:55,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:55,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010446442] [2024-06-20 17:31:55,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010446442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:55,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:55,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:55,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353133767] [2024-06-20 17:31:55,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:55,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:55,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:55,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 247 transitions, 2569 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) [2024-06-20 17:31:55,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:55,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:55,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:56,688 INFO L124 PetriNetUnfolderBase]: 2405/3850 cut-off events. [2024-06-20 17:31:56,688 INFO L125 PetriNetUnfolderBase]: For 225966/225966 co-relation queries the response was YES. [2024-06-20 17:31:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 3850 events. 2405/3850 cut-off events. For 225966/225966 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22001 event pairs, 554 based on Foata normal form. 2/3847 useless extension candidates. Maximal degree in co-relation 24210. Up to 3324 conditions per place. [2024-06-20 17:31:56,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 81 changer transitions 0/281 dead transitions. [2024-06-20 17:31:56,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 281 transitions, 3522 flow [2024-06-20 17:31:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:31:56,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:31:56,727 INFO L175 Difference]: Start difference. First operand has 216 places, 247 transitions, 2569 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:31:56,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 281 transitions, 3522 flow [2024-06-20 17:31:57,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3425 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:57,090 INFO L231 Difference]: Finished difference. Result has 216 places, 250 transitions, 2705 flow [2024-06-20 17:31:57,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=216, PETRI_TRANSITIONS=250} [2024-06-20 17:31:57,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 17:31:57,090 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 250 transitions, 2705 flow [2024-06-20 17:31:57,091 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) [2024-06-20 17:31:57,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:57,091 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] [2024-06-20 17:31:57,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:31:57,091 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)] === [2024-06-20 17:31:57,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1481069067, now seen corresponding path program 6 times [2024-06-20 17:31:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:57,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308905] [2024-06-20 17:31:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:57,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:00,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:00,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308905] [2024-06-20 17:32:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:00,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93235122] [2024-06-20 17:32:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:00,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:00,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 250 transitions, 2705 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) [2024-06-20 17:32:00,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:00,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:00,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:01,670 INFO L124 PetriNetUnfolderBase]: 2415/3868 cut-off events. [2024-06-20 17:32:01,671 INFO L125 PetriNetUnfolderBase]: For 233053/233053 co-relation queries the response was YES. [2024-06-20 17:32:01,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24727 conditions, 3868 events. 2415/3868 cut-off events. For 233053/233053 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22152 event pairs, 554 based on Foata normal form. 2/3865 useless extension candidates. Maximal degree in co-relation 24630. Up to 3334 conditions per place. [2024-06-20 17:32:01,711 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 82 changer transitions 0/280 dead transitions. [2024-06-20 17:32:01,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 280 transitions, 3656 flow [2024-06-20 17:32:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:32:01,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:32:01,714 INFO L175 Difference]: Start difference. First operand has 216 places, 250 transitions, 2705 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:32:01,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 280 transitions, 3656 flow [2024-06-20 17:32:02,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3337 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 17:32:02,093 INFO L231 Difference]: Finished difference. Result has 217 places, 253 transitions, 2627 flow [2024-06-20 17:32:02,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2627, PETRI_PLACES=217, PETRI_TRANSITIONS=253} [2024-06-20 17:32:02,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 17:32:02,094 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 253 transitions, 2627 flow [2024-06-20 17:32:02,094 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) [2024-06-20 17:32:02,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:02,094 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] [2024-06-20 17:32:02,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:32:02,094 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)] === [2024-06-20 17:32:02,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 81619411, now seen corresponding path program 7 times [2024-06-20 17:32:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419080032] [2024-06-20 17:32:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:02,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:05,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:05,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419080032] [2024-06-20 17:32:05,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419080032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:05,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:05,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847354609] [2024-06-20 17:32:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:05,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:05,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 253 transitions, 2627 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) [2024-06-20 17:32:05,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:05,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:05,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:06,531 INFO L124 PetriNetUnfolderBase]: 2425/3874 cut-off events. [2024-06-20 17:32:06,531 INFO L125 PetriNetUnfolderBase]: For 237694/237694 co-relation queries the response was YES. [2024-06-20 17:32:06,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24704 conditions, 3874 events. 2425/3874 cut-off events. For 237694/237694 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22227 event pairs, 561 based on Foata normal form. 2/3871 useless extension candidates. Maximal degree in co-relation 24606. Up to 3344 conditions per place. [2024-06-20 17:32:06,568 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 87 changer transitions 0/278 dead transitions. [2024-06-20 17:32:06,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 278 transitions, 3407 flow [2024-06-20 17:32:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:32:06,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:32:06,569 INFO L175 Difference]: Start difference. First operand has 217 places, 253 transitions, 2627 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:32:06,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 278 transitions, 3407 flow [2024-06-20 17:32:06,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 278 transitions, 3229 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:06,919 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2677 flow [2024-06-20 17:32:06,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2677, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-20 17:32:06,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-20 17:32:06,920 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2677 flow [2024-06-20 17:32:06,920 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) [2024-06-20 17:32:06,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:06,920 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] [2024-06-20 17:32:06,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:32:06,921 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)] === [2024-06-20 17:32:06,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1445600383, now seen corresponding path program 8 times [2024-06-20 17:32:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183989712] [2024-06-20 17:32:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:09,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183989712] [2024-06-20 17:32:09,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183989712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:09,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:09,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168292332] [2024-06-20 17:32:09,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:09,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:09,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:09,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2677 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) [2024-06-20 17:32:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:11,289 INFO L124 PetriNetUnfolderBase]: 2419/3866 cut-off events. [2024-06-20 17:32:11,290 INFO L125 PetriNetUnfolderBase]: For 239361/239361 co-relation queries the response was YES. [2024-06-20 17:32:11,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24588 conditions, 3866 events. 2419/3866 cut-off events. For 239361/239361 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22194 event pairs, 667 based on Foata normal form. 2/3863 useless extension candidates. Maximal degree in co-relation 24489. Up to 3569 conditions per place. [2024-06-20 17:32:11,322 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 50 changer transitions 0/276 dead transitions. [2024-06-20 17:32:11,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 276 transitions, 3401 flow [2024-06-20 17:32:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:32:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:32:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:32:11,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:32:11,324 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2677 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:32:11,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 276 transitions, 3401 flow [2024-06-20 17:32:11,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 276 transitions, 3222 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:11,693 INFO L231 Difference]: Finished difference. Result has 225 places, 256 transitions, 2604 flow [2024-06-20 17:32:11,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2604, PETRI_PLACES=225, PETRI_TRANSITIONS=256} [2024-06-20 17:32:11,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 17:32:11,694 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 256 transitions, 2604 flow [2024-06-20 17:32:11,694 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) [2024-06-20 17:32:11,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:11,694 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] [2024-06-20 17:32:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:32:11,694 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)] === [2024-06-20 17:32:11,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1508280389, now seen corresponding path program 9 times [2024-06-20 17:32:11,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:11,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904384604] [2024-06-20 17:32:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904384604] [2024-06-20 17:32:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904384604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:14,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:14,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781661706] [2024-06-20 17:32:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:14,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:14,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 256 transitions, 2604 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) [2024-06-20 17:32:14,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:14,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:16,056 INFO L124 PetriNetUnfolderBase]: 2413/3858 cut-off events. [2024-06-20 17:32:16,056 INFO L125 PetriNetUnfolderBase]: For 240430/240430 co-relation queries the response was YES. [2024-06-20 17:32:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 3858 events. 2413/3858 cut-off events. For 240430/240430 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22148 event pairs, 669 based on Foata normal form. 2/3855 useless extension candidates. Maximal degree in co-relation 24169. Up to 3564 conditions per place. [2024-06-20 17:32:16,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 49 changer transitions 0/272 dead transitions. [2024-06-20 17:32:16,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 272 transitions, 3174 flow [2024-06-20 17:32:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:32:16,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:32:16,111 INFO L175 Difference]: Start difference. First operand has 225 places, 256 transitions, 2604 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:32:16,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 272 transitions, 3174 flow [2024-06-20 17:32:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 272 transitions, 2932 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-20 17:32:16,549 INFO L231 Difference]: Finished difference. Result has 222 places, 256 transitions, 2466 flow [2024-06-20 17:32:16,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2466, PETRI_PLACES=222, PETRI_TRANSITIONS=256} [2024-06-20 17:32:16,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 17:32:16,551 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 256 transitions, 2466 flow [2024-06-20 17:32:16,551 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) [2024-06-20 17:32:16,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:16,551 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] [2024-06-20 17:32:16,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:32:16,552 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)] === [2024-06-20 17:32:16,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1984255893, now seen corresponding path program 4 times [2024-06-20 17:32:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:16,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614930560] [2024-06-20 17:32:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:19,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614930560] [2024-06-20 17:32:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614930560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:19,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:19,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:19,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435584036] [2024-06-20 17:32:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:19,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:19,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 256 transitions, 2466 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) [2024-06-20 17:32:19,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:19,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:19,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:21,242 INFO L124 PetriNetUnfolderBase]: 2434/3902 cut-off events. [2024-06-20 17:32:21,242 INFO L125 PetriNetUnfolderBase]: For 250629/250629 co-relation queries the response was YES. [2024-06-20 17:32:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24589 conditions, 3902 events. 2434/3902 cut-off events. For 250629/250629 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22387 event pairs, 558 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 24488. Up to 3514 conditions per place. [2024-06-20 17:32:21,280 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 49 changer transitions 0/290 dead transitions. [2024-06-20 17:32:21,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 290 transitions, 3320 flow [2024-06-20 17:32:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:32:21,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:32:21,282 INFO L175 Difference]: Start difference. First operand has 222 places, 256 transitions, 2466 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:32:21,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 290 transitions, 3320 flow [2024-06-20 17:32:21,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 290 transitions, 3204 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:32:21,678 INFO L231 Difference]: Finished difference. Result has 222 places, 260 transitions, 2529 flow [2024-06-20 17:32:21,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=222, PETRI_TRANSITIONS=260} [2024-06-20 17:32:21,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 17:32:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 260 transitions, 2529 flow [2024-06-20 17:32:21,679 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) [2024-06-20 17:32:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:21,680 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] [2024-06-20 17:32:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:32:21,680 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)] === [2024-06-20 17:32:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1343158711, now seen corresponding path program 5 times [2024-06-20 17:32:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15036044] [2024-06-20 17:32:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:25,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:25,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15036044] [2024-06-20 17:32:25,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15036044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:25,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:25,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359590531] [2024-06-20 17:32:25,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:25,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:25,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:25,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:25,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 260 transitions, 2529 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) [2024-06-20 17:32:25,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:25,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:25,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:26,646 INFO L124 PetriNetUnfolderBase]: 2442/3920 cut-off events. [2024-06-20 17:32:26,647 INFO L125 PetriNetUnfolderBase]: For 258210/258210 co-relation queries the response was YES. [2024-06-20 17:32:26,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24932 conditions, 3920 events. 2442/3920 cut-off events. For 258210/258210 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22516 event pairs, 566 based on Foata normal form. 2/3919 useless extension candidates. Maximal degree in co-relation 24830. Up to 3563 conditions per place. [2024-06-20 17:32:26,680 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 46 changer transitions 0/287 dead transitions. [2024-06-20 17:32:26,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 287 transitions, 3191 flow [2024-06-20 17:32:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:32:26,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:32:26,682 INFO L175 Difference]: Start difference. First operand has 222 places, 260 transitions, 2529 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:32:26,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 287 transitions, 3191 flow [2024-06-20 17:32:27,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 287 transitions, 3071 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 17:32:27,046 INFO L231 Difference]: Finished difference. Result has 226 places, 262 transitions, 2550 flow [2024-06-20 17:32:27,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2550, PETRI_PLACES=226, PETRI_TRANSITIONS=262} [2024-06-20 17:32:27,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 17:32:27,047 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 262 transitions, 2550 flow [2024-06-20 17:32:27,047 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) [2024-06-20 17:32:27,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:27,047 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] [2024-06-20 17:32:27,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:32:27,047 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)] === [2024-06-20 17:32:27,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1628198131, now seen corresponding path program 6 times [2024-06-20 17:32:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:27,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265832308] [2024-06-20 17:32:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:27,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265832308] [2024-06-20 17:32:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265832308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:30,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727601878] [2024-06-20 17:32:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:30,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:30,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 262 transitions, 2550 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) [2024-06-20 17:32:30,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:30,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:30,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:31,545 INFO L124 PetriNetUnfolderBase]: 2450/3930 cut-off events. [2024-06-20 17:32:31,546 INFO L125 PetriNetUnfolderBase]: For 264264/264264 co-relation queries the response was YES. [2024-06-20 17:32:31,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25128 conditions, 3930 events. 2450/3930 cut-off events. For 264264/264264 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22617 event pairs, 483 based on Foata normal form. 2/3929 useless extension candidates. Maximal degree in co-relation 25024. Up to 3386 conditions per place. [2024-06-20 17:32:31,582 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 229 selfloop transitions, 67 changer transitions 0/301 dead transitions. [2024-06-20 17:32:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 301 transitions, 3638 flow [2024-06-20 17:32:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:32:31,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:32:31,583 INFO L175 Difference]: Start difference. First operand has 226 places, 262 transitions, 2550 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:32:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 301 transitions, 3638 flow [2024-06-20 17:32:32,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 301 transitions, 3535 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:32,025 INFO L231 Difference]: Finished difference. Result has 229 places, 270 transitions, 2760 flow [2024-06-20 17:32:32,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2760, PETRI_PLACES=229, PETRI_TRANSITIONS=270} [2024-06-20 17:32:32,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 17:32:32,026 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 270 transitions, 2760 flow [2024-06-20 17:32:32,026 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) [2024-06-20 17:32:32,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:32,026 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] [2024-06-20 17:32:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:32:32,026 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)] === [2024-06-20 17:32:32,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1639625971, now seen corresponding path program 7 times [2024-06-20 17:32:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024579283] [2024-06-20 17:32:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024579283] [2024-06-20 17:32:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024579283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:35,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:35,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460656758] [2024-06-20 17:32:35,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:35,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:35,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:35,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 270 transitions, 2760 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) [2024-06-20 17:32:35,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:35,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:35,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:36,736 INFO L124 PetriNetUnfolderBase]: 2458/3946 cut-off events. [2024-06-20 17:32:36,736 INFO L125 PetriNetUnfolderBase]: For 272204/272204 co-relation queries the response was YES. [2024-06-20 17:32:36,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25698 conditions, 3946 events. 2458/3946 cut-off events. For 272204/272204 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22735 event pairs, 486 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 25592. Up to 3394 conditions per place. [2024-06-20 17:32:36,774 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 224 selfloop transitions, 70 changer transitions 0/299 dead transitions. [2024-06-20 17:32:36,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 299 transitions, 3625 flow [2024-06-20 17:32:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:32:36,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:32:36,776 INFO L175 Difference]: Start difference. First operand has 229 places, 270 transitions, 2760 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:32:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 299 transitions, 3625 flow [2024-06-20 17:32:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 299 transitions, 3471 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:37,374 INFO L231 Difference]: Finished difference. Result has 234 places, 273 transitions, 2820 flow [2024-06-20 17:32:37,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2820, PETRI_PLACES=234, PETRI_TRANSITIONS=273} [2024-06-20 17:32:37,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-20 17:32:37,375 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 273 transitions, 2820 flow [2024-06-20 17:32:37,375 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) [2024-06-20 17:32:37,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:37,375 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] [2024-06-20 17:32:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:32:37,376 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)] === [2024-06-20 17:32:37,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1353335701, now seen corresponding path program 8 times [2024-06-20 17:32:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128723111] [2024-06-20 17:32:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128723111] [2024-06-20 17:32:40,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128723111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:40,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:40,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604563499] [2024-06-20 17:32:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:40,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:40,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:40,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:40,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 273 transitions, 2820 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) [2024-06-20 17:32:40,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:40,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:40,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:42,083 INFO L124 PetriNetUnfolderBase]: 2466/3958 cut-off events. [2024-06-20 17:32:42,083 INFO L125 PetriNetUnfolderBase]: For 278035/278035 co-relation queries the response was YES. [2024-06-20 17:32:42,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25854 conditions, 3958 events. 2466/3958 cut-off events. For 278035/278035 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22906 event pairs, 574 based on Foata normal form. 2/3957 useless extension candidates. Maximal degree in co-relation 25746. Up to 3599 conditions per place. [2024-06-20 17:32:42,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 245 selfloop transitions, 46 changer transitions 0/296 dead transitions. [2024-06-20 17:32:42,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 296 transitions, 3486 flow [2024-06-20 17:32:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:32:42,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:32:42,125 INFO L175 Difference]: Start difference. First operand has 234 places, 273 transitions, 2820 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:32:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 296 transitions, 3486 flow [2024-06-20 17:32:42,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 296 transitions, 3366 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:32:42,650 INFO L231 Difference]: Finished difference. Result has 238 places, 275 transitions, 2837 flow [2024-06-20 17:32:42,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2837, PETRI_PLACES=238, PETRI_TRANSITIONS=275} [2024-06-20 17:32:42,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-20 17:32:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 275 transitions, 2837 flow [2024-06-20 17:32:42,651 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) [2024-06-20 17:32:42,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:42,651 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] [2024-06-20 17:32:42,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:32:42,651 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)] === [2024-06-20 17:32:42,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1993173245, now seen corresponding path program 9 times [2024-06-20 17:32:42,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:42,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323373905] [2024-06-20 17:32:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:42,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323373905] [2024-06-20 17:32:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323373905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:46,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893228317] [2024-06-20 17:32:46,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:46,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:46,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:46,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 275 transitions, 2837 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) [2024-06-20 17:32:46,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:46,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:46,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:47,400 INFO L124 PetriNetUnfolderBase]: 2474/3974 cut-off events. [2024-06-20 17:32:47,400 INFO L125 PetriNetUnfolderBase]: For 284402/284402 co-relation queries the response was YES. [2024-06-20 17:32:47,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25889 conditions, 3974 events. 2474/3974 cut-off events. For 284402/284402 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23048 event pairs, 574 based on Foata normal form. 2/3973 useless extension candidates. Maximal degree in co-relation 25780. Up to 3585 conditions per place. [2024-06-20 17:32:47,438 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 241 selfloop transitions, 53 changer transitions 0/299 dead transitions. [2024-06-20 17:32:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 299 transitions, 3515 flow [2024-06-20 17:32:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:32:47,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:32:47,439 INFO L175 Difference]: Start difference. First operand has 238 places, 275 transitions, 2837 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:32:47,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 299 transitions, 3515 flow [2024-06-20 17:32:47,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 299 transitions, 3408 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:47,967 INFO L231 Difference]: Finished difference. Result has 241 places, 278 transitions, 2901 flow [2024-06-20 17:32:47,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2901, PETRI_PLACES=241, PETRI_TRANSITIONS=278} [2024-06-20 17:32:47,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 17:32:47,967 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 278 transitions, 2901 flow [2024-06-20 17:32:47,968 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) [2024-06-20 17:32:47,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:47,968 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] [2024-06-20 17:32:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:32:47,968 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)] === [2024-06-20 17:32:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1610603391, now seen corresponding path program 10 times [2024-06-20 17:32:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663113093] [2024-06-20 17:32:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:51,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:51,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663113093] [2024-06-20 17:32:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663113093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:51,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:51,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:51,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636863876] [2024-06-20 17:32:51,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:51,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:51,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:51,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:51,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 278 transitions, 2901 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) [2024-06-20 17:32:51,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:51,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:51,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:52,646 INFO L124 PetriNetUnfolderBase]: 2469/3948 cut-off events. [2024-06-20 17:32:52,646 INFO L125 PetriNetUnfolderBase]: For 285750/285750 co-relation queries the response was YES. [2024-06-20 17:32:52,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25808 conditions, 3948 events. 2469/3948 cut-off events. For 285750/285750 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22900 event pairs, 673 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 25697. Up to 3666 conditions per place. [2024-06-20 17:32:52,682 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 44 changer transitions 0/294 dead transitions. [2024-06-20 17:32:52,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 294 transitions, 3515 flow [2024-06-20 17:32:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:32:52,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 17:32:52,684 INFO L175 Difference]: Start difference. First operand has 241 places, 278 transitions, 2901 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:32:52,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 294 transitions, 3515 flow [2024-06-20 17:32:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 294 transitions, 3386 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:53,073 INFO L231 Difference]: Finished difference. Result has 244 places, 278 transitions, 2865 flow [2024-06-20 17:32:53,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=244, PETRI_TRANSITIONS=278} [2024-06-20 17:32:53,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 17:32:53,074 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 278 transitions, 2865 flow [2024-06-20 17:32:53,074 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) [2024-06-20 17:32:53,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:53,074 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] [2024-06-20 17:32:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:32:53,075 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)] === [2024-06-20 17:32:53,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1656386803, now seen corresponding path program 11 times [2024-06-20 17:32:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168811311] [2024-06-20 17:32:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:56,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168811311] [2024-06-20 17:32:56,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168811311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:56,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:56,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862008315] [2024-06-20 17:32:56,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:56,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:56,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:32:56,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 278 transitions, 2865 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) [2024-06-20 17:32:56,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:56,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:32:56,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:57,836 INFO L124 PetriNetUnfolderBase]: 2500/3997 cut-off events. [2024-06-20 17:32:57,837 INFO L125 PetriNetUnfolderBase]: For 317042/317042 co-relation queries the response was YES. [2024-06-20 17:32:57,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25973 conditions, 3997 events. 2500/3997 cut-off events. For 317042/317042 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23216 event pairs, 676 based on Foata normal form. 12/4004 useless extension candidates. Maximal degree in co-relation 25861. Up to 3673 conditions per place. [2024-06-20 17:32:57,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 46 changer transitions 0/302 dead transitions. [2024-06-20 17:32:57,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 302 transitions, 3579 flow [2024-06-20 17:32:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:32:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:32:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 17:32:57,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 17:32:57,878 INFO L175 Difference]: Start difference. First operand has 244 places, 278 transitions, 2865 flow. Second operand 10 states and 158 transitions. [2024-06-20 17:32:57,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 302 transitions, 3579 flow [2024-06-20 17:32:58,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 302 transitions, 3446 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:32:58,396 INFO L231 Difference]: Finished difference. Result has 247 places, 279 transitions, 2856 flow [2024-06-20 17:32:58,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2856, PETRI_PLACES=247, PETRI_TRANSITIONS=279} [2024-06-20 17:32:58,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-20 17:32:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 279 transitions, 2856 flow [2024-06-20 17:32:58,396 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) [2024-06-20 17:32:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:58,397 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] [2024-06-20 17:32:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:32:58,397 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)] === [2024-06-20 17:32:58,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1046072743, now seen corresponding path program 12 times [2024-06-20 17:32:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112139592] [2024-06-20 17:32:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112139592] [2024-06-20 17:33:01,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112139592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:01,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:01,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659457850] [2024-06-20 17:33:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:01,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:01,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 279 transitions, 2856 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) [2024-06-20 17:33:01,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:01,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:01,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:02,957 INFO L124 PetriNetUnfolderBase]: 2495/3988 cut-off events. [2024-06-20 17:33:02,957 INFO L125 PetriNetUnfolderBase]: For 286724/286724 co-relation queries the response was YES. [2024-06-20 17:33:02,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25860 conditions, 3988 events. 2495/3988 cut-off events. For 286724/286724 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23052 event pairs, 671 based on Foata normal form. 2/3985 useless extension candidates. Maximal degree in co-relation 25747. Up to 3598 conditions per place. [2024-06-20 17:33:02,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 53 changer transitions 0/299 dead transitions. [2024-06-20 17:33:02,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 299 transitions, 3536 flow [2024-06-20 17:33:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:33:02,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 17:33:02,995 INFO L175 Difference]: Start difference. First operand has 247 places, 279 transitions, 2856 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:33:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 299 transitions, 3536 flow [2024-06-20 17:33:03,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 299 transitions, 3424 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:03,543 INFO L231 Difference]: Finished difference. Result has 247 places, 279 transitions, 2855 flow [2024-06-20 17:33:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2855, PETRI_PLACES=247, PETRI_TRANSITIONS=279} [2024-06-20 17:33:03,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-20 17:33:03,544 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 279 transitions, 2855 flow [2024-06-20 17:33:03,544 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) [2024-06-20 17:33:03,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:03,544 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] [2024-06-20 17:33:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:33:03,544 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)] === [2024-06-20 17:33:03,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:03,545 INFO L85 PathProgramCache]: Analyzing trace with hash -637572786, now seen corresponding path program 1 times [2024-06-20 17:33:03,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:03,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736439843] [2024-06-20 17:33:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:06,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736439843] [2024-06-20 17:33:06,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736439843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:06,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:06,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485393074] [2024-06-20 17:33:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:06,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:06,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:06,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 279 transitions, 2855 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) [2024-06-20 17:33:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:07,993 INFO L124 PetriNetUnfolderBase]: 2673/4288 cut-off events. [2024-06-20 17:33:07,993 INFO L125 PetriNetUnfolderBase]: For 341224/341224 co-relation queries the response was YES. [2024-06-20 17:33:08,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28137 conditions, 4288 events. 2673/4288 cut-off events. For 341224/341224 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25066 event pairs, 663 based on Foata normal form. 8/4295 useless extension candidates. Maximal degree in co-relation 28023. Up to 3790 conditions per place. [2024-06-20 17:33:08,042 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 293 selfloop transitions, 57 changer transitions 0/355 dead transitions. [2024-06-20 17:33:08,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 355 transitions, 4097 flow [2024-06-20 17:33:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:33:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:33:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 17:33:08,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-20 17:33:08,044 INFO L175 Difference]: Start difference. First operand has 247 places, 279 transitions, 2855 flow. Second operand 10 states and 191 transitions. [2024-06-20 17:33:08,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 355 transitions, 4097 flow [2024-06-20 17:33:08,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 355 transitions, 3968 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:08,736 INFO L231 Difference]: Finished difference. Result has 253 places, 296 transitions, 3079 flow [2024-06-20 17:33:08,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3079, PETRI_PLACES=253, PETRI_TRANSITIONS=296} [2024-06-20 17:33:08,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 17:33:08,737 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 296 transitions, 3079 flow [2024-06-20 17:33:08,737 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) [2024-06-20 17:33:08,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:08,737 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] [2024-06-20 17:33:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:33:08,738 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)] === [2024-06-20 17:33:08,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 194918700, now seen corresponding path program 2 times [2024-06-20 17:33:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010859869] [2024-06-20 17:33:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:12,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:12,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010859869] [2024-06-20 17:33:12,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010859869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:12,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:12,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:12,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697701023] [2024-06-20 17:33:12,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:12,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:12,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:12,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 296 transitions, 3079 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) [2024-06-20 17:33:12,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:12,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:12,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:14,156 INFO L124 PetriNetUnfolderBase]: 2761/4440 cut-off events. [2024-06-20 17:33:14,156 INFO L125 PetriNetUnfolderBase]: For 353144/353144 co-relation queries the response was YES. [2024-06-20 17:33:14,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29379 conditions, 4440 events. 2761/4440 cut-off events. For 353144/353144 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26052 event pairs, 589 based on Foata normal form. 8/4447 useless extension candidates. Maximal degree in co-relation 29262. Up to 3650 conditions per place. [2024-06-20 17:33:14,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 67 changer transitions 0/347 dead transitions. [2024-06-20 17:33:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 347 transitions, 4157 flow [2024-06-20 17:33:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:33:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:33:14,199 INFO L175 Difference]: Start difference. First operand has 253 places, 296 transitions, 3079 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:33:14,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 347 transitions, 4157 flow [2024-06-20 17:33:14,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 347 transitions, 3994 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:14,747 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 3156 flow [2024-06-20 17:33:14,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3156, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-20 17:33:14,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 17:33:14,748 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 3156 flow [2024-06-20 17:33:14,748 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) [2024-06-20 17:33:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:14,748 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] [2024-06-20 17:33:14,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:33:14,748 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)] === [2024-06-20 17:33:14,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash -800533158, now seen corresponding path program 3 times [2024-06-20 17:33:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89121778] [2024-06-20 17:33:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89121778] [2024-06-20 17:33:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89121778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:18,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543327858] [2024-06-20 17:33:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:18,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:18,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 3156 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) [2024-06-20 17:33:18,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:18,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:18,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:20,222 INFO L124 PetriNetUnfolderBase]: 2817/4530 cut-off events. [2024-06-20 17:33:20,223 INFO L125 PetriNetUnfolderBase]: For 362735/362735 co-relation queries the response was YES. [2024-06-20 17:33:20,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29630 conditions, 4530 events. 2817/4530 cut-off events. For 362735/362735 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26754 event pairs, 696 based on Foata normal form. 16/4545 useless extension candidates. Maximal degree in co-relation 29512. Up to 4022 conditions per place. [2024-06-20 17:33:20,270 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 58 changer transitions 0/347 dead transitions. [2024-06-20 17:33:20,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 347 transitions, 4081 flow [2024-06-20 17:33:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:33:20,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:33:20,273 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 3156 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:33:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 347 transitions, 4081 flow [2024-06-20 17:33:21,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 347 transitions, 3937 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:21,067 INFO L231 Difference]: Finished difference. Result has 261 places, 305 transitions, 3237 flow [2024-06-20 17:33:21,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3237, PETRI_PLACES=261, PETRI_TRANSITIONS=305} [2024-06-20 17:33:21,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-20 17:33:21,068 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 305 transitions, 3237 flow [2024-06-20 17:33:21,069 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) [2024-06-20 17:33:21,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:21,069 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, 1] [2024-06-20 17:33:21,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:33:21,069 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)] === [2024-06-20 17:33:21,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:21,070 INFO L85 PathProgramCache]: Analyzing trace with hash -948050502, now seen corresponding path program 1 times [2024-06-20 17:33:21,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:21,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51158398] [2024-06-20 17:33:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:21,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51158398] [2024-06-20 17:33:24,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51158398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:24,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:24,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005241430] [2024-06-20 17:33:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:24,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:24,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:24,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 305 transitions, 3237 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) [2024-06-20 17:33:24,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:24,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:24,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:26,217 INFO L124 PetriNetUnfolderBase]: 2837/4558 cut-off events. [2024-06-20 17:33:26,217 INFO L125 PetriNetUnfolderBase]: For 322395/322395 co-relation queries the response was YES. [2024-06-20 17:33:26,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29615 conditions, 4558 events. 2837/4558 cut-off events. For 322395/322395 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27013 event pairs, 718 based on Foata normal form. 4/4561 useless extension candidates. Maximal degree in co-relation 29496. Up to 4046 conditions per place. [2024-06-20 17:33:26,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 78 changer transitions 0/350 dead transitions. [2024-06-20 17:33:26,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 350 transitions, 4267 flow [2024-06-20 17:33:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:33:26,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:33:26,268 INFO L175 Difference]: Start difference. First operand has 261 places, 305 transitions, 3237 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:33:26,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 350 transitions, 4267 flow [2024-06-20 17:33:27,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 350 transitions, 4169 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:33:27,134 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 3373 flow [2024-06-20 17:33:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3373, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2024-06-20 17:33:27,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:33:27,141 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 3373 flow [2024-06-20 17:33:27,142 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) [2024-06-20 17:33:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:27,142 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] [2024-06-20 17:33:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:33:27,142 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)] === [2024-06-20 17:33:27,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash -562723494, now seen corresponding path program 4 times [2024-06-20 17:33:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600944623] [2024-06-20 17:33:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600944623] [2024-06-20 17:33:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600944623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858789770] [2024-06-20 17:33:30,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:30,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:30,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 3373 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) [2024-06-20 17:33:30,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:30,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:32,632 INFO L124 PetriNetUnfolderBase]: 2865/4600 cut-off events. [2024-06-20 17:33:32,632 INFO L125 PetriNetUnfolderBase]: For 345022/345022 co-relation queries the response was YES. [2024-06-20 17:33:32,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30324 conditions, 4600 events. 2865/4600 cut-off events. For 345022/345022 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27189 event pairs, 694 based on Foata normal form. 8/4607 useless extension candidates. Maximal degree in co-relation 30204. Up to 4174 conditions per place. [2024-06-20 17:33:32,682 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 53 changer transitions 0/345 dead transitions. [2024-06-20 17:33:32,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 345 transitions, 4238 flow [2024-06-20 17:33:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:33:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:33:32,683 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 3373 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:33:32,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 345 transitions, 4238 flow [2024-06-20 17:33:33,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 345 transitions, 4035 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:33,473 INFO L231 Difference]: Finished difference. Result has 270 places, 310 transitions, 3348 flow [2024-06-20 17:33:33,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3348, PETRI_PLACES=270, PETRI_TRANSITIONS=310} [2024-06-20 17:33:33,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-20 17:33:33,474 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 310 transitions, 3348 flow [2024-06-20 17:33:33,474 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) [2024-06-20 17:33:33,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:33,475 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] [2024-06-20 17:33:33,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:33:33,475 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)] === [2024-06-20 17:33:33,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash -437364310, now seen corresponding path program 2 times [2024-06-20 17:33:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86610184] [2024-06-20 17:33:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86610184] [2024-06-20 17:33:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86610184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:36,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:36,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67346904] [2024-06-20 17:33:36,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:36,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:36,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:36,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:36,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:36,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:36,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 310 transitions, 3348 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) [2024-06-20 17:33:36,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:36,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:36,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:38,893 INFO L124 PetriNetUnfolderBase]: 2917/4686 cut-off events. [2024-06-20 17:33:38,894 INFO L125 PetriNetUnfolderBase]: For 354818/354820 co-relation queries the response was YES. [2024-06-20 17:33:38,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31150 conditions, 4686 events. 2917/4686 cut-off events. For 354818/354820 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 27775 event pairs, 591 based on Foata normal form. 6/4691 useless extension candidates. Maximal degree in co-relation 31028. Up to 3480 conditions per place. [2024-06-20 17:33:38,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 156 changer transitions 0/363 dead transitions. [2024-06-20 17:33:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 363 transitions, 4896 flow [2024-06-20 17:33:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:33:38,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 17:33:38,948 INFO L175 Difference]: Start difference. First operand has 270 places, 310 transitions, 3348 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:33:38,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 363 transitions, 4896 flow [2024-06-20 17:33:39,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 363 transitions, 4779 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:39,886 INFO L231 Difference]: Finished difference. Result has 274 places, 319 transitions, 3771 flow [2024-06-20 17:33:39,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3771, PETRI_PLACES=274, PETRI_TRANSITIONS=319} [2024-06-20 17:33:39,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 17:33:39,887 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 319 transitions, 3771 flow [2024-06-20 17:33:39,887 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) [2024-06-20 17:33:39,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:39,887 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] [2024-06-20 17:33:39,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:33:39,887 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)] === [2024-06-20 17:33:39,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash 697700748, now seen corresponding path program 3 times [2024-06-20 17:33:39,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:39,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377934715] [2024-06-20 17:33:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:39,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:43,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377934715] [2024-06-20 17:33:43,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377934715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:43,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:43,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:43,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384602483] [2024-06-20 17:33:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:43,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:43,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:43,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:43,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 319 transitions, 3771 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) [2024-06-20 17:33:43,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:43,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:43,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:45,315 INFO L124 PetriNetUnfolderBase]: 2969/4760 cut-off events. [2024-06-20 17:33:45,315 INFO L125 PetriNetUnfolderBase]: For 382017/382019 co-relation queries the response was YES. [2024-06-20 17:33:45,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32820 conditions, 4760 events. 2969/4760 cut-off events. For 382017/382019 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28272 event pairs, 595 based on Foata normal form. 6/4765 useless extension candidates. Maximal degree in co-relation 32698. Up to 3520 conditions per place. [2024-06-20 17:33:45,372 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 156 changer transitions 0/366 dead transitions. [2024-06-20 17:33:45,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 366 transitions, 5261 flow [2024-06-20 17:33:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:33:45,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:33:45,374 INFO L175 Difference]: Start difference. First operand has 274 places, 319 transitions, 3771 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:33:45,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 366 transitions, 5261 flow [2024-06-20 17:33:46,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 366 transitions, 4926 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:46,144 INFO L231 Difference]: Finished difference. Result has 278 places, 325 transitions, 3910 flow [2024-06-20 17:33:46,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3910, PETRI_PLACES=278, PETRI_TRANSITIONS=325} [2024-06-20 17:33:46,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 17:33:46,145 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 325 transitions, 3910 flow [2024-06-20 17:33:46,145 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) [2024-06-20 17:33:46,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:46,145 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] [2024-06-20 17:33:46,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:33:46,145 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)] === [2024-06-20 17:33:46,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -533570280, now seen corresponding path program 4 times [2024-06-20 17:33:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33414472] [2024-06-20 17:33:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33414472] [2024-06-20 17:33:49,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33414472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:49,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:49,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091030450] [2024-06-20 17:33:49,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:49,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:49,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 325 transitions, 3910 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) [2024-06-20 17:33:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:51,152 INFO L124 PetriNetUnfolderBase]: 2957/4744 cut-off events. [2024-06-20 17:33:51,153 INFO L125 PetriNetUnfolderBase]: For 365313/365315 co-relation queries the response was YES. [2024-06-20 17:33:51,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31631 conditions, 4744 events. 2957/4744 cut-off events. For 365313/365315 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28202 event pairs, 595 based on Foata normal form. 6/4749 useless extension candidates. Maximal degree in co-relation 31508. Up to 3512 conditions per place. [2024-06-20 17:33:51,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 158 changer transitions 0/364 dead transitions. [2024-06-20 17:33:51,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 364 transitions, 5070 flow [2024-06-20 17:33:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:33:51,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:33:51,208 INFO L175 Difference]: Start difference. First operand has 278 places, 325 transitions, 3910 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:33:51,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 364 transitions, 5070 flow [2024-06-20 17:33:52,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 364 transitions, 4765 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:52,073 INFO L231 Difference]: Finished difference. Result has 282 places, 325 transitions, 3927 flow [2024-06-20 17:33:52,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3927, PETRI_PLACES=282, PETRI_TRANSITIONS=325} [2024-06-20 17:33:52,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 17:33:52,074 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 325 transitions, 3927 flow [2024-06-20 17:33:52,074 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) [2024-06-20 17:33:52,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:52,074 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] [2024-06-20 17:33:52,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:33:52,074 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)] === [2024-06-20 17:33:52,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash -415021638, now seen corresponding path program 5 times [2024-06-20 17:33:52,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:52,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325139705] [2024-06-20 17:33:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:52,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325139705] [2024-06-20 17:33:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325139705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:55,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32645831] [2024-06-20 17:33:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:55,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:55,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:55,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:33:55,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 325 transitions, 3927 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) [2024-06-20 17:33:55,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:55,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:33:55,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:57,430 INFO L124 PetriNetUnfolderBase]: 3009/4824 cut-off events. [2024-06-20 17:33:57,430 INFO L125 PetriNetUnfolderBase]: For 389681/389681 co-relation queries the response was YES. [2024-06-20 17:33:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32464 conditions, 4824 events. 3009/4824 cut-off events. For 389681/389681 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28821 event pairs, 720 based on Foata normal form. 4/4827 useless extension candidates. Maximal degree in co-relation 32340. Up to 4306 conditions per place. [2024-06-20 17:33:57,493 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 72 changer transitions 0/363 dead transitions. [2024-06-20 17:33:57,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 363 transitions, 5011 flow [2024-06-20 17:33:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:33:57,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:33:57,495 INFO L175 Difference]: Start difference. First operand has 282 places, 325 transitions, 3927 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:33:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 363 transitions, 5011 flow [2024-06-20 17:33:58,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 363 transitions, 4675 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:58,331 INFO L231 Difference]: Finished difference. Result has 283 places, 331 transitions, 3861 flow [2024-06-20 17:33:58,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3861, PETRI_PLACES=283, PETRI_TRANSITIONS=331} [2024-06-20 17:33:58,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:33:58,331 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 331 transitions, 3861 flow [2024-06-20 17:33:58,332 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) [2024-06-20 17:33:58,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:58,332 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] [2024-06-20 17:33:58,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:33:58,332 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)] === [2024-06-20 17:33:58,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash -414665448, now seen corresponding path program 6 times [2024-06-20 17:33:58,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:58,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967281677] [2024-06-20 17:33:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967281677] [2024-06-20 17:34:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967281677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:01,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:01,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:01,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166626579] [2024-06-20 17:34:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:01,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:01,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 331 transitions, 3861 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) [2024-06-20 17:34:01,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:01,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:01,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:03,130 INFO L124 PetriNetUnfolderBase]: 3029/4850 cut-off events. [2024-06-20 17:34:03,131 INFO L125 PetriNetUnfolderBase]: For 397052/397052 co-relation queries the response was YES. [2024-06-20 17:34:03,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32319 conditions, 4850 events. 3029/4850 cut-off events. For 397052/397052 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28989 event pairs, 722 based on Foata normal form. 4/4853 useless extension candidates. Maximal degree in co-relation 32194. Up to 4322 conditions per place. [2024-06-20 17:34:03,191 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 75 changer transitions 0/366 dead transitions. [2024-06-20 17:34:03,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 4896 flow [2024-06-20 17:34:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:34:03,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:34:03,193 INFO L175 Difference]: Start difference. First operand has 283 places, 331 transitions, 3861 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:34:03,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 4896 flow [2024-06-20 17:34:04,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 366 transitions, 4775 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:04,101 INFO L231 Difference]: Finished difference. Result has 287 places, 334 transitions, 3953 flow [2024-06-20 17:34:04,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3953, PETRI_PLACES=287, PETRI_TRANSITIONS=334} [2024-06-20 17:34:04,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 17:34:04,102 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 334 transitions, 3953 flow [2024-06-20 17:34:04,102 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) [2024-06-20 17:34:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:04,102 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] [2024-06-20 17:34:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:34:04,102 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)] === [2024-06-20 17:34:04,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash -215363658, now seen corresponding path program 7 times [2024-06-20 17:34:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131923624] [2024-06-20 17:34:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131923624] [2024-06-20 17:34:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131923624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:07,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290915309] [2024-06-20 17:34:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:07,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:07,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 334 transitions, 3953 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) [2024-06-20 17:34:07,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:07,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:07,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:09,287 INFO L124 PetriNetUnfolderBase]: 3017/4838 cut-off events. [2024-06-20 17:34:09,287 INFO L125 PetriNetUnfolderBase]: For 388862/388862 co-relation queries the response was YES. [2024-06-20 17:34:09,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32091 conditions, 4838 events. 3017/4838 cut-off events. For 388862/388862 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28919 event pairs, 718 based on Foata normal form. 4/4841 useless extension candidates. Maximal degree in co-relation 31964. Up to 4314 conditions per place. [2024-06-20 17:34:09,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 78 changer transitions 0/368 dead transitions. [2024-06-20 17:34:09,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 368 transitions, 4763 flow [2024-06-20 17:34:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:34:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:34:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 17:34:09,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 17:34:09,342 INFO L175 Difference]: Start difference. First operand has 287 places, 334 transitions, 3953 flow. Second operand 11 states and 183 transitions. [2024-06-20 17:34:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 368 transitions, 4763 flow [2024-06-20 17:34:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 368 transitions, 4581 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:34:10,349 INFO L231 Difference]: Finished difference. Result has 292 places, 334 transitions, 3933 flow [2024-06-20 17:34:10,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3933, PETRI_PLACES=292, PETRI_TRANSITIONS=334} [2024-06-20 17:34:10,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 17:34:10,350 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 334 transitions, 3933 flow [2024-06-20 17:34:10,350 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) [2024-06-20 17:34:10,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:10,350 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] [2024-06-20 17:34:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:34:10,351 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)] === [2024-06-20 17:34:10,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash -622276966, now seen corresponding path program 1 times [2024-06-20 17:34:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:10,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596517035] [2024-06-20 17:34:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596517035] [2024-06-20 17:34:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596517035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:13,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661237934] [2024-06-20 17:34:13,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:13,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:13,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:13,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 334 transitions, 3933 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) [2024-06-20 17:34:13,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:13,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:13,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:15,854 INFO L124 PetriNetUnfolderBase]: 3117/4996 cut-off events. [2024-06-20 17:34:15,855 INFO L125 PetriNetUnfolderBase]: For 461677/461679 co-relation queries the response was YES. [2024-06-20 17:34:15,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34006 conditions, 4996 events. 3117/4996 cut-off events. For 461677/461679 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30001 event pairs, 681 based on Foata normal form. 10/5005 useless extension candidates. Maximal degree in co-relation 33878. Up to 4102 conditions per place. [2024-06-20 17:34:15,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 97 changer transitions 0/384 dead transitions. [2024-06-20 17:34:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 384 transitions, 5077 flow [2024-06-20 17:34:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:34:15,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 17:34:15,911 INFO L175 Difference]: Start difference. First operand has 292 places, 334 transitions, 3933 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:34:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 384 transitions, 5077 flow [2024-06-20 17:34:16,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 384 transitions, 4885 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 17:34:16,988 INFO L231 Difference]: Finished difference. Result has 290 places, 336 transitions, 3977 flow [2024-06-20 17:34:16,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3977, PETRI_PLACES=290, PETRI_TRANSITIONS=336} [2024-06-20 17:34:16,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 17:34:16,989 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 336 transitions, 3977 flow [2024-06-20 17:34:16,989 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) [2024-06-20 17:34:16,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:16,989 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] [2024-06-20 17:34:16,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:34:16,989 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)] === [2024-06-20 17:34:16,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash 781870950, now seen corresponding path program 2 times [2024-06-20 17:34:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607827247] [2024-06-20 17:34:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:20,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:20,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607827247] [2024-06-20 17:34:20,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607827247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:20,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:20,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950540722] [2024-06-20 17:34:20,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:20,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:20,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:20,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 336 transitions, 3977 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) [2024-06-20 17:34:20,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:20,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:22,389 INFO L124 PetriNetUnfolderBase]: 3161/5074 cut-off events. [2024-06-20 17:34:22,390 INFO L125 PetriNetUnfolderBase]: For 489379/489381 co-relation queries the response was YES. [2024-06-20 17:34:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34767 conditions, 5074 events. 3161/5074 cut-off events. For 489379/489381 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30512 event pairs, 703 based on Foata normal form. 14/5087 useless extension candidates. Maximal degree in co-relation 34638. Up to 4330 conditions per place. [2024-06-20 17:34:22,453 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 91 changer transitions 0/378 dead transitions. [2024-06-20 17:34:22,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 378 transitions, 4883 flow [2024-06-20 17:34:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:34:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:34:22,455 INFO L175 Difference]: Start difference. First operand has 290 places, 336 transitions, 3977 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:34:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 378 transitions, 4883 flow [2024-06-20 17:34:23,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 378 transitions, 4762 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:23,830 INFO L231 Difference]: Finished difference. Result has 294 places, 337 transitions, 4065 flow [2024-06-20 17:34:23,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4065, PETRI_PLACES=294, PETRI_TRANSITIONS=337} [2024-06-20 17:34:23,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 17:34:23,831 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 337 transitions, 4065 flow [2024-06-20 17:34:23,831 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) [2024-06-20 17:34:23,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:23,831 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] [2024-06-20 17:34:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:34:23,831 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)] === [2024-06-20 17:34:23,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 611224202, now seen corresponding path program 3 times [2024-06-20 17:34:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:23,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827810724] [2024-06-20 17:34:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827810724] [2024-06-20 17:34:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827810724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102076749] [2024-06-20 17:34:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:27,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:27,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:27,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 337 transitions, 4065 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) [2024-06-20 17:34:27,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:27,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:27,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:29,122 INFO L124 PetriNetUnfolderBase]: 3189/5118 cut-off events. [2024-06-20 17:34:29,123 INFO L125 PetriNetUnfolderBase]: For 482882/482884 co-relation queries the response was YES. [2024-06-20 17:34:29,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35447 conditions, 5118 events. 3189/5118 cut-off events. For 482882/482884 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30836 event pairs, 697 based on Foata normal form. 10/5127 useless extension candidates. Maximal degree in co-relation 35316. Up to 4336 conditions per place. [2024-06-20 17:34:29,191 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 93 changer transitions 0/382 dead transitions. [2024-06-20 17:34:29,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 382 transitions, 4999 flow [2024-06-20 17:34:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:34:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:34:29,192 INFO L175 Difference]: Start difference. First operand has 294 places, 337 transitions, 4065 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:34:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 382 transitions, 4999 flow [2024-06-20 17:34:30,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 382 transitions, 4810 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:30,567 INFO L231 Difference]: Finished difference. Result has 296 places, 338 transitions, 4090 flow [2024-06-20 17:34:30,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4090, PETRI_PLACES=296, PETRI_TRANSITIONS=338} [2024-06-20 17:34:30,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 17:34:30,567 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 338 transitions, 4090 flow [2024-06-20 17:34:30,567 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) [2024-06-20 17:34:30,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:30,568 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] [2024-06-20 17:34:30,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:34:30,568 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)] === [2024-06-20 17:34:30,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1537858484, now seen corresponding path program 4 times [2024-06-20 17:34:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:30,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631463908] [2024-06-20 17:34:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:30,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631463908] [2024-06-20 17:34:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631463908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711642504] [2024-06-20 17:34:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:34,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:34,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 338 transitions, 4090 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) [2024-06-20 17:34:34,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:34,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:34,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:36,358 INFO L124 PetriNetUnfolderBase]: 3373/5392 cut-off events. [2024-06-20 17:34:36,358 INFO L125 PetriNetUnfolderBase]: For 702589/702589 co-relation queries the response was YES. [2024-06-20 17:34:36,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37060 conditions, 5392 events. 3373/5392 cut-off events. For 702589/702589 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32607 event pairs, 816 based on Foata normal form. 56/5447 useless extension candidates. Maximal degree in co-relation 36928. Up to 4642 conditions per place. [2024-06-20 17:34:36,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 63 changer transitions 8/379 dead transitions. [2024-06-20 17:34:36,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 379 transitions, 5018 flow [2024-06-20 17:34:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:34:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:34:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-20 17:34:36,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:34:36,425 INFO L175 Difference]: Start difference. First operand has 296 places, 338 transitions, 4090 flow. Second operand 11 states and 187 transitions. [2024-06-20 17:34:36,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 379 transitions, 5018 flow [2024-06-20 17:34:37,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 379 transitions, 4818 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:37,906 INFO L231 Difference]: Finished difference. Result has 300 places, 333 transitions, 3974 flow [2024-06-20 17:34:37,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3974, PETRI_PLACES=300, PETRI_TRANSITIONS=333} [2024-06-20 17:34:37,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 17:34:37,907 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 333 transitions, 3974 flow [2024-06-20 17:34:37,907 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) [2024-06-20 17:34:37,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:37,907 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] [2024-06-20 17:34:37,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:34:37,907 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)] === [2024-06-20 17:34:37,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash -414802654, now seen corresponding path program 5 times [2024-06-20 17:34:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:37,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889083527] [2024-06-20 17:34:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:37,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:41,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:41,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889083527] [2024-06-20 17:34:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889083527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:41,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:41,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:41,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345779869] [2024-06-20 17:34:41,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:41,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:41,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:41,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 333 transitions, 3974 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) [2024-06-20 17:34:41,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:41,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:41,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:43,815 INFO L124 PetriNetUnfolderBase]: 3385/5412 cut-off events. [2024-06-20 17:34:43,815 INFO L125 PetriNetUnfolderBase]: For 718832/718832 co-relation queries the response was YES. [2024-06-20 17:34:43,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37137 conditions, 5412 events. 3385/5412 cut-off events. For 718832/718832 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32753 event pairs, 828 based on Foata normal form. 56/5467 useless extension candidates. Maximal degree in co-relation 37004. Up to 4694 conditions per place. [2024-06-20 17:34:43,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 56 changer transitions 6/371 dead transitions. [2024-06-20 17:34:43,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 371 transitions, 4882 flow [2024-06-20 17:34:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:34:43,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:34:43,881 INFO L175 Difference]: Start difference. First operand has 300 places, 333 transitions, 3974 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:34:43,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 371 transitions, 4882 flow [2024-06-20 17:34:45,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 371 transitions, 4745 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:34:45,709 INFO L231 Difference]: Finished difference. Result has 300 places, 330 transitions, 3947 flow [2024-06-20 17:34:45,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3947, PETRI_PLACES=300, PETRI_TRANSITIONS=330} [2024-06-20 17:34:45,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 17:34:45,710 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 330 transitions, 3947 flow [2024-06-20 17:34:45,710 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) [2024-06-20 17:34:45,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:45,710 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] [2024-06-20 17:34:45,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:34:45,710 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)] === [2024-06-20 17:34:45,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1023895016, now seen corresponding path program 1 times [2024-06-20 17:34:45,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:45,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649882799] [2024-06-20 17:34:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:45,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:49,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649882799] [2024-06-20 17:34:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649882799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:49,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:49,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417090774] [2024-06-20 17:34:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:49,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:49,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:49,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:49,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:49,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 330 transitions, 3947 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) [2024-06-20 17:34:49,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:51,325 INFO L124 PetriNetUnfolderBase]: 3373/5398 cut-off events. [2024-06-20 17:34:51,326 INFO L125 PetriNetUnfolderBase]: For 691394/691394 co-relation queries the response was YES. [2024-06-20 17:34:51,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37090 conditions, 5398 events. 3373/5398 cut-off events. For 691394/691394 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32743 event pairs, 780 based on Foata normal form. 48/5445 useless extension candidates. Maximal degree in co-relation 36956. Up to 4462 conditions per place. [2024-06-20 17:34:51,394 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 55 changer transitions 18/379 dead transitions. [2024-06-20 17:34:51,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 379 transitions, 4977 flow [2024-06-20 17:34:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:34:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:34:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-20 17:34:51,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-20 17:34:51,396 INFO L175 Difference]: Start difference. First operand has 300 places, 330 transitions, 3947 flow. Second operand 11 states and 190 transitions. [2024-06-20 17:34:51,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 379 transitions, 4977 flow [2024-06-20 17:34:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 379 transitions, 4852 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:53,012 INFO L231 Difference]: Finished difference. Result has 305 places, 321 transitions, 3803 flow [2024-06-20 17:34:53,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3803, PETRI_PLACES=305, PETRI_TRANSITIONS=321} [2024-06-20 17:34:53,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 17:34:53,013 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 321 transitions, 3803 flow [2024-06-20 17:34:53,013 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) [2024-06-20 17:34:53,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:53,013 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] [2024-06-20 17:34:53,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:34:53,014 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)] === [2024-06-20 17:34:53,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2124615982, now seen corresponding path program 6 times [2024-06-20 17:34:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:53,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662517355] [2024-06-20 17:34:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662517355] [2024-06-20 17:34:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662517355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:56,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:56,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187204542] [2024-06-20 17:34:56,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:34:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 321 transitions, 3803 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) [2024-06-20 17:34:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:56,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:34:56,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:58,506 INFO L124 PetriNetUnfolderBase]: 3265/5236 cut-off events. [2024-06-20 17:34:58,507 INFO L125 PetriNetUnfolderBase]: For 706177/706177 co-relation queries the response was YES. [2024-06-20 17:34:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36180 conditions, 5236 events. 3265/5236 cut-off events. For 706177/706177 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31481 event pairs, 780 based on Foata normal form. 48/5283 useless extension candidates. Maximal degree in co-relation 36044. Up to 4444 conditions per place. [2024-06-20 17:34:58,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 48 changer transitions 12/365 dead transitions. [2024-06-20 17:34:58,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 365 transitions, 4773 flow [2024-06-20 17:34:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:34:58,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:34:58,562 INFO L175 Difference]: Start difference. First operand has 305 places, 321 transitions, 3803 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:34:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 365 transitions, 4773 flow [2024-06-20 17:34:59,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 365 transitions, 4650 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-20 17:34:59,974 INFO L231 Difference]: Finished difference. Result has 302 places, 316 transitions, 3709 flow [2024-06-20 17:34:59,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3709, PETRI_PLACES=302, PETRI_TRANSITIONS=316} [2024-06-20 17:34:59,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 17:34:59,975 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 316 transitions, 3709 flow [2024-06-20 17:34:59,975 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) [2024-06-20 17:34:59,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:59,975 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] [2024-06-20 17:34:59,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:34:59,975 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)] === [2024-06-20 17:34:59,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1575998520, now seen corresponding path program 5 times [2024-06-20 17:34:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:59,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038560235] [2024-06-20 17:34:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:03,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038560235] [2024-06-20 17:35:03,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038560235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:03,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:03,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:03,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751430171] [2024-06-20 17:35:03,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:03,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:03,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:03,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 316 transitions, 3709 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) [2024-06-20 17:35:03,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:03,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:05,227 INFO L124 PetriNetUnfolderBase]: 3075/4943 cut-off events. [2024-06-20 17:35:05,227 INFO L125 PetriNetUnfolderBase]: For 494561/494561 co-relation queries the response was YES. [2024-06-20 17:35:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33971 conditions, 4943 events. 3075/4943 cut-off events. For 494561/494561 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29757 event pairs, 793 based on Foata normal form. 8/4944 useless extension candidates. Maximal degree in co-relation 33833. Up to 4476 conditions per place. [2024-06-20 17:35:05,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 43 changer transitions 0/342 dead transitions. [2024-06-20 17:35:05,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 342 transitions, 4489 flow [2024-06-20 17:35:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:35:05,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:35:05,283 INFO L175 Difference]: Start difference. First operand has 302 places, 316 transitions, 3709 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:35:05,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 342 transitions, 4489 flow [2024-06-20 17:35:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 342 transitions, 4357 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:35:06,513 INFO L231 Difference]: Finished difference. Result has 304 places, 316 transitions, 3667 flow [2024-06-20 17:35:06,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3667, PETRI_PLACES=304, PETRI_TRANSITIONS=316} [2024-06-20 17:35:06,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 17:35:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 316 transitions, 3667 flow [2024-06-20 17:35:06,514 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) [2024-06-20 17:35:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:06,514 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] [2024-06-20 17:35:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:35:06,515 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)] === [2024-06-20 17:35:06,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1375718680, now seen corresponding path program 8 times [2024-06-20 17:35:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797494570] [2024-06-20 17:35:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:09,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797494570] [2024-06-20 17:35:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797494570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551935680] [2024-06-20 17:35:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:09,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:09,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 316 transitions, 3667 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) [2024-06-20 17:35:09,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:09,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:09,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:11,873 INFO L124 PetriNetUnfolderBase]: 3095/4979 cut-off events. [2024-06-20 17:35:11,873 INFO L125 PetriNetUnfolderBase]: For 482377/482377 co-relation queries the response was YES. [2024-06-20 17:35:11,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33900 conditions, 4979 events. 3095/4979 cut-off events. For 482377/482377 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29996 event pairs, 672 based on Foata normal form. 4/4976 useless extension candidates. Maximal degree in co-relation 33761. Up to 3758 conditions per place. [2024-06-20 17:35:11,931 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 154 changer transitions 0/357 dead transitions. [2024-06-20 17:35:11,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 357 transitions, 4927 flow [2024-06-20 17:35:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:35:11,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:35:11,933 INFO L175 Difference]: Start difference. First operand has 304 places, 316 transitions, 3667 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:35:11,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 357 transitions, 4927 flow [2024-06-20 17:35:13,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 357 transitions, 4783 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:35:13,414 INFO L231 Difference]: Finished difference. Result has 305 places, 319 transitions, 3905 flow [2024-06-20 17:35:13,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3905, PETRI_PLACES=305, PETRI_TRANSITIONS=319} [2024-06-20 17:35:13,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 17:35:13,414 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 319 transitions, 3905 flow [2024-06-20 17:35:13,414 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) [2024-06-20 17:35:13,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:13,415 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] [2024-06-20 17:35:13,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:35:13,415 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)] === [2024-06-20 17:35:13,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1205528270, now seen corresponding path program 9 times [2024-06-20 17:35:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:13,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480709587] [2024-06-20 17:35:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480709587] [2024-06-20 17:35:16,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480709587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:16,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:16,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:16,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699895008] [2024-06-20 17:35:16,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:16,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:16,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 319 transitions, 3905 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) [2024-06-20 17:35:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:19,018 INFO L124 PetriNetUnfolderBase]: 3147/5067 cut-off events. [2024-06-20 17:35:19,018 INFO L125 PetriNetUnfolderBase]: For 513255/513255 co-relation queries the response was YES. [2024-06-20 17:35:19,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35360 conditions, 5067 events. 3147/5067 cut-off events. For 513255/513255 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30721 event pairs, 670 based on Foata normal form. 4/5064 useless extension candidates. Maximal degree in co-relation 35221. Up to 3798 conditions per place. [2024-06-20 17:35:19,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 153 changer transitions 0/361 dead transitions. [2024-06-20 17:35:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 361 transitions, 5447 flow [2024-06-20 17:35:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:35:19,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:35:19,078 INFO L175 Difference]: Start difference. First operand has 305 places, 319 transitions, 3905 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:35:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 361 transitions, 5447 flow [2024-06-20 17:35:20,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 361 transitions, 4937 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-20 17:35:20,816 INFO L231 Difference]: Finished difference. Result has 306 places, 325 transitions, 3855 flow [2024-06-20 17:35:20,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3855, PETRI_PLACES=306, PETRI_TRANSITIONS=325} [2024-06-20 17:35:20,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-20 17:35:20,817 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 325 transitions, 3855 flow [2024-06-20 17:35:20,817 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) [2024-06-20 17:35:20,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:20,817 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] [2024-06-20 17:35:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:35:20,817 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)] === [2024-06-20 17:35:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1386194200, now seen corresponding path program 10 times [2024-06-20 17:35:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233571125] [2024-06-20 17:35:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:24,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233571125] [2024-06-20 17:35:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233571125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166951516] [2024-06-20 17:35:24,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:24,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:24,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 325 transitions, 3855 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) [2024-06-20 17:35:24,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:24,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:24,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:26,235 INFO L124 PetriNetUnfolderBase]: 3135/5047 cut-off events. [2024-06-20 17:35:26,235 INFO L125 PetriNetUnfolderBase]: For 499503/499503 co-relation queries the response was YES. [2024-06-20 17:35:26,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34428 conditions, 5047 events. 3135/5047 cut-off events. For 499503/499503 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30521 event pairs, 676 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 34289. Up to 3790 conditions per place. [2024-06-20 17:35:26,295 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 154 changer transitions 0/359 dead transitions. [2024-06-20 17:35:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 359 transitions, 5047 flow [2024-06-20 17:35:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:35:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:35:26,297 INFO L175 Difference]: Start difference. First operand has 306 places, 325 transitions, 3855 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:35:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 359 transitions, 5047 flow [2024-06-20 17:35:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 359 transitions, 4715 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:27,979 INFO L231 Difference]: Finished difference. Result has 310 places, 325 transitions, 3837 flow [2024-06-20 17:35:27,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3837, PETRI_PLACES=310, PETRI_TRANSITIONS=325} [2024-06-20 17:35:27,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-20 17:35:27,979 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 325 transitions, 3837 flow [2024-06-20 17:35:27,980 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) [2024-06-20 17:35:27,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:27,980 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] [2024-06-20 17:35:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:35:27,980 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)] === [2024-06-20 17:35:27,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1944717780, now seen corresponding path program 11 times [2024-06-20 17:35:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:27,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238361009] [2024-06-20 17:35:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:31,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238361009] [2024-06-20 17:35:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238361009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:31,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:31,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005509862] [2024-06-20 17:35:31,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:31,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:31,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:31,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 325 transitions, 3837 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) [2024-06-20 17:35:31,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:31,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:33,140 INFO L124 PetriNetUnfolderBase]: 3219/5171 cut-off events. [2024-06-20 17:35:33,141 INFO L125 PetriNetUnfolderBase]: For 551239/551239 co-relation queries the response was YES. [2024-06-20 17:35:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35995 conditions, 5171 events. 3219/5171 cut-off events. For 551239/551239 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31400 event pairs, 680 based on Foata normal form. 4/5168 useless extension candidates. Maximal degree in co-relation 35855. Up to 3854 conditions per place. [2024-06-20 17:35:33,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 162 changer transitions 0/366 dead transitions. [2024-06-20 17:35:33,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 366 transitions, 5412 flow [2024-06-20 17:35:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:35:33,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:35:33,204 INFO L175 Difference]: Start difference. First operand has 310 places, 325 transitions, 3837 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:35:33,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 366 transitions, 5412 flow [2024-06-20 17:35:34,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 366 transitions, 5078 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:35:34,717 INFO L231 Difference]: Finished difference. Result has 311 places, 334 transitions, 4004 flow [2024-06-20 17:35:34,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4004, PETRI_PLACES=311, PETRI_TRANSITIONS=334} [2024-06-20 17:35:34,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 17:35:34,718 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 334 transitions, 4004 flow [2024-06-20 17:35:34,718 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) [2024-06-20 17:35:34,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:34,718 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] [2024-06-20 17:35:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:35:34,718 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)] === [2024-06-20 17:35:34,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1545220470, now seen corresponding path program 12 times [2024-06-20 17:35:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:34,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095983768] [2024-06-20 17:35:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:37,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:37,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095983768] [2024-06-20 17:35:37,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095983768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756214027] [2024-06-20 17:35:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:37,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:37,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:37,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 334 transitions, 4004 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) [2024-06-20 17:35:37,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:37,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:37,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:39,702 INFO L124 PetriNetUnfolderBase]: 3207/5170 cut-off events. [2024-06-20 17:35:39,703 INFO L125 PetriNetUnfolderBase]: For 540938/540938 co-relation queries the response was YES. [2024-06-20 17:35:39,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35581 conditions, 5170 events. 3207/5170 cut-off events. For 540938/540938 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31456 event pairs, 765 based on Foata normal form. 4/5173 useless extension candidates. Maximal degree in co-relation 35440. Up to 4759 conditions per place. [2024-06-20 17:35:39,763 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 32 changer transitions 0/362 dead transitions. [2024-06-20 17:35:39,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 362 transitions, 4786 flow [2024-06-20 17:35:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:35:39,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 17:35:39,765 INFO L175 Difference]: Start difference. First operand has 311 places, 334 transitions, 4004 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:35:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 362 transitions, 4786 flow [2024-06-20 17:35:41,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 362 transitions, 4495 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 17:35:41,570 INFO L231 Difference]: Finished difference. Result has 316 places, 334 transitions, 3783 flow [2024-06-20 17:35:41,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3783, PETRI_PLACES=316, PETRI_TRANSITIONS=334} [2024-06-20 17:35:41,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 17:35:41,570 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 334 transitions, 3783 flow [2024-06-20 17:35:41,571 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) [2024-06-20 17:35:41,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:41,571 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] [2024-06-20 17:35:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:35:41,571 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)] === [2024-06-20 17:35:41,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1510758450, now seen corresponding path program 13 times [2024-06-20 17:35:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:41,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556328808] [2024-06-20 17:35:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:45,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556328808] [2024-06-20 17:35:45,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556328808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:45,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:45,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:45,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677822144] [2024-06-20 17:35:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:45,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:45,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:45,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 334 transitions, 3783 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) [2024-06-20 17:35:45,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:45,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:45,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:47,209 INFO L124 PetriNetUnfolderBase]: 3195/5143 cut-off events. [2024-06-20 17:35:47,210 INFO L125 PetriNetUnfolderBase]: For 527546/527546 co-relation queries the response was YES. [2024-06-20 17:35:47,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34447 conditions, 5143 events. 3195/5143 cut-off events. For 527546/527546 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31347 event pairs, 684 based on Foata normal form. 4/5140 useless extension candidates. Maximal degree in co-relation 34305. Up to 3838 conditions per place. [2024-06-20 17:35:47,271 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 163 changer transitions 0/364 dead transitions. [2024-06-20 17:35:47,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 364 transitions, 4779 flow [2024-06-20 17:35:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:35:47,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 17:35:47,272 INFO L175 Difference]: Start difference. First operand has 316 places, 334 transitions, 3783 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:35:47,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 364 transitions, 4779 flow [2024-06-20 17:35:49,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 364 transitions, 4675 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 17:35:49,245 INFO L231 Difference]: Finished difference. Result has 317 places, 334 transitions, 4011 flow [2024-06-20 17:35:49,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4011, PETRI_PLACES=317, PETRI_TRANSITIONS=334} [2024-06-20 17:35:49,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 17:35:49,246 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 334 transitions, 4011 flow [2024-06-20 17:35:49,246 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) [2024-06-20 17:35:49,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:49,246 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] [2024-06-20 17:35:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:35:49,246 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)] === [2024-06-20 17:35:49,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash -452962428, now seen corresponding path program 14 times [2024-06-20 17:35:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:49,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314934566] [2024-06-20 17:35:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314934566] [2024-06-20 17:35:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314934566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982412019] [2024-06-20 17:35:52,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:52,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:52,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 334 transitions, 4011 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) [2024-06-20 17:35:52,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:52,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:52,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:54,208 INFO L124 PetriNetUnfolderBase]: 3215/5184 cut-off events. [2024-06-20 17:35:54,209 INFO L125 PetriNetUnfolderBase]: For 540028/540028 co-relation queries the response was YES. [2024-06-20 17:35:54,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35257 conditions, 5184 events. 3215/5184 cut-off events. For 540028/540028 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31637 event pairs, 866 based on Foata normal form. 4/5187 useless extension candidates. Maximal degree in co-relation 35114. Up to 4817 conditions per place. [2024-06-20 17:35:54,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 330 selfloop transitions, 25 changer transitions 0/360 dead transitions. [2024-06-20 17:35:54,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 360 transitions, 4835 flow [2024-06-20 17:35:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:35:54,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-20 17:35:54,270 INFO L175 Difference]: Start difference. First operand has 317 places, 334 transitions, 4011 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:35:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 360 transitions, 4835 flow [2024-06-20 17:35:55,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 360 transitions, 4499 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:35:55,867 INFO L231 Difference]: Finished difference. Result has 318 places, 337 transitions, 3797 flow [2024-06-20 17:35:55,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3797, PETRI_PLACES=318, PETRI_TRANSITIONS=337} [2024-06-20 17:35:55,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-20 17:35:55,867 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 337 transitions, 3797 flow [2024-06-20 17:35:55,868 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) [2024-06-20 17:35:55,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:55,868 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] [2024-06-20 17:35:55,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:35:55,868 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)] === [2024-06-20 17:35:55,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1665928306, now seen corresponding path program 15 times [2024-06-20 17:35:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:55,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118216456] [2024-06-20 17:35:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:55,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118216456] [2024-06-20 17:35:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118216456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133693768] [2024-06-20 17:35:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:59,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:35:59,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 337 transitions, 3797 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) [2024-06-20 17:35:59,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:59,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:35:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:00,625 INFO L124 PetriNetUnfolderBase]: 3267/5259 cut-off events. [2024-06-20 17:36:00,625 INFO L125 PetriNetUnfolderBase]: For 571687/571687 co-relation queries the response was YES. [2024-06-20 17:36:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35639 conditions, 5259 events. 3267/5259 cut-off events. For 571687/571687 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32105 event pairs, 807 based on Foata normal form. 4/5256 useless extension candidates. Maximal degree in co-relation 35495. Up to 4390 conditions per place. [2024-06-20 17:36:00,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 104 changer transitions 0/369 dead transitions. [2024-06-20 17:36:00,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 369 transitions, 5335 flow [2024-06-20 17:36:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:36:00,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:36:00,691 INFO L175 Difference]: Start difference. First operand has 318 places, 337 transitions, 3797 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:36:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 369 transitions, 5335 flow [2024-06-20 17:36:02,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 369 transitions, 5253 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:36:02,699 INFO L231 Difference]: Finished difference. Result has 320 places, 343 transitions, 4049 flow [2024-06-20 17:36:02,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3715, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4049, PETRI_PLACES=320, PETRI_TRANSITIONS=343} [2024-06-20 17:36:02,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 17:36:02,700 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 343 transitions, 4049 flow [2024-06-20 17:36:02,700 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) [2024-06-20 17:36:02,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:02,700 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, 1, 1] [2024-06-20 17:36:02,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:36:02,700 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)] === [2024-06-20 17:36:02,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1665572116, now seen corresponding path program 16 times [2024-06-20 17:36:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6296954] [2024-06-20 17:36:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:06,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:06,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6296954] [2024-06-20 17:36:06,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6296954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:06,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:06,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051562083] [2024-06-20 17:36:06,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:06,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:06,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:06,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:06,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 343 transitions, 4049 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) [2024-06-20 17:36:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:06,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:06,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:07,750 INFO L124 PetriNetUnfolderBase]: 3255/5239 cut-off events. [2024-06-20 17:36:07,750 INFO L125 PetriNetUnfolderBase]: For 560707/560707 co-relation queries the response was YES. [2024-06-20 17:36:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35478 conditions, 5239 events. 3255/5239 cut-off events. For 560707/560707 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31988 event pairs, 805 based on Foata normal form. 4/5236 useless extension candidates. Maximal degree in co-relation 35333. Up to 4382 conditions per place. [2024-06-20 17:36:07,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 106 changer transitions 0/368 dead transitions. [2024-06-20 17:36:07,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 368 transitions, 5257 flow [2024-06-20 17:36:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:36:07,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:36:07,813 INFO L175 Difference]: Start difference. First operand has 320 places, 343 transitions, 4049 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:36:07,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 368 transitions, 5257 flow [2024-06-20 17:36:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 368 transitions, 4902 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 17:36:10,024 INFO L231 Difference]: Finished difference. Result has 323 places, 343 transitions, 3912 flow [2024-06-20 17:36:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3912, PETRI_PLACES=323, PETRI_TRANSITIONS=343} [2024-06-20 17:36:10,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 17:36:10,025 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 343 transitions, 3912 flow [2024-06-20 17:36:10,025 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) [2024-06-20 17:36:10,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:10,025 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] [2024-06-20 17:36:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:36:10,025 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)] === [2024-06-20 17:36:10,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -659358514, now seen corresponding path program 17 times [2024-06-20 17:36:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:10,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482981616] [2024-06-20 17:36:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482981616] [2024-06-20 17:36:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482981616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:13,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808895502] [2024-06-20 17:36:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:13,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:13,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:13,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 343 transitions, 3912 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) [2024-06-20 17:36:13,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:13,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:13,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:14,984 INFO L124 PetriNetUnfolderBase]: 3275/5272 cut-off events. [2024-06-20 17:36:14,985 INFO L125 PetriNetUnfolderBase]: For 568196/568196 co-relation queries the response was YES. [2024-06-20 17:36:15,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35494 conditions, 5272 events. 3275/5272 cut-off events. For 568196/568196 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32232 event pairs, 874 based on Foata normal form. 4/5275 useless extension candidates. Maximal degree in co-relation 35348. Up to 4777 conditions per place. [2024-06-20 17:36:15,040 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 44 changer transitions 0/374 dead transitions. [2024-06-20 17:36:15,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 374 transitions, 5204 flow [2024-06-20 17:36:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:36:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:36:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-20 17:36:15,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-20 17:36:15,042 INFO L175 Difference]: Start difference. First operand has 323 places, 343 transitions, 3912 flow. Second operand 11 states and 170 transitions. [2024-06-20 17:36:15,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 374 transitions, 5204 flow [2024-06-20 17:36:17,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 374 transitions, 5012 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:36:17,138 INFO L231 Difference]: Finished difference. Result has 327 places, 346 transitions, 3882 flow [2024-06-20 17:36:17,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3882, PETRI_PLACES=327, PETRI_TRANSITIONS=346} [2024-06-20 17:36:17,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 17:36:17,139 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 346 transitions, 3882 flow [2024-06-20 17:36:17,139 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) [2024-06-20 17:36:17,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:17,139 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] [2024-06-20 17:36:17,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:36:17,139 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)] === [2024-06-20 17:36:17,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1518004126, now seen corresponding path program 18 times [2024-06-20 17:36:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:17,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085928669] [2024-06-20 17:36:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:17,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:20,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:20,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085928669] [2024-06-20 17:36:20,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085928669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:20,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:20,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479911993] [2024-06-20 17:36:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:20,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:20,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 346 transitions, 3882 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) [2024-06-20 17:36:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:20,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:22,203 INFO L124 PetriNetUnfolderBase]: 3263/5268 cut-off events. [2024-06-20 17:36:22,203 INFO L125 PetriNetUnfolderBase]: For 554549/554549 co-relation queries the response was YES. [2024-06-20 17:36:22,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34829 conditions, 5268 events. 3263/5268 cut-off events. For 554549/554549 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32325 event pairs, 902 based on Foata normal form. 4/5271 useless extension candidates. Maximal degree in co-relation 34682. Up to 4931 conditions per place. [2024-06-20 17:36:22,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 340 selfloop transitions, 20 changer transitions 0/365 dead transitions. [2024-06-20 17:36:22,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 365 transitions, 4648 flow [2024-06-20 17:36:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:36:22,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-20 17:36:22,292 INFO L175 Difference]: Start difference. First operand has 327 places, 346 transitions, 3882 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:36:22,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 365 transitions, 4648 flow [2024-06-20 17:36:24,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 365 transitions, 4478 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 17:36:24,102 INFO L231 Difference]: Finished difference. Result has 327 places, 346 transitions, 3758 flow [2024-06-20 17:36:24,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3758, PETRI_PLACES=327, PETRI_TRANSITIONS=346} [2024-06-20 17:36:24,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 17:36:24,103 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 346 transitions, 3758 flow [2024-06-20 17:36:24,103 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) [2024-06-20 17:36:24,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:24,124 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] [2024-06-20 17:36:24,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:36:24,124 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)] === [2024-06-20 17:36:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1746082906, now seen corresponding path program 19 times [2024-06-20 17:36:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645133419] [2024-06-20 17:36:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645133419] [2024-06-20 17:36:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645133419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:27,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:27,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603307642] [2024-06-20 17:36:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:27,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:27,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:27,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 346 transitions, 3758 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) [2024-06-20 17:36:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:27,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:27,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:29,080 INFO L124 PetriNetUnfolderBase]: 3251/5244 cut-off events. [2024-06-20 17:36:29,080 INFO L125 PetriNetUnfolderBase]: For 538445/538445 co-relation queries the response was YES. [2024-06-20 17:36:29,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34080 conditions, 5244 events. 3251/5244 cut-off events. For 538445/538445 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 32141 event pairs, 882 based on Foata normal form. 4/5247 useless extension candidates. Maximal degree in co-relation 33932. Up to 4761 conditions per place. [2024-06-20 17:36:29,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 44 changer transitions 0/378 dead transitions. [2024-06-20 17:36:29,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 378 transitions, 4576 flow [2024-06-20 17:36:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:36:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:36:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2024-06-20 17:36:29,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-20 17:36:29,152 INFO L175 Difference]: Start difference. First operand has 327 places, 346 transitions, 3758 flow. Second operand 13 states and 196 transitions. [2024-06-20 17:36:29,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 378 transitions, 4576 flow [2024-06-20 17:36:31,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 378 transitions, 4498 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 17:36:31,201 INFO L231 Difference]: Finished difference. Result has 332 places, 346 transitions, 3774 flow [2024-06-20 17:36:31,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3774, PETRI_PLACES=332, PETRI_TRANSITIONS=346} [2024-06-20 17:36:31,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 17:36:31,202 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 346 transitions, 3774 flow [2024-06-20 17:36:31,202 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) [2024-06-20 17:36:31,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:31,202 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] [2024-06-20 17:36:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:36:31,203 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)] === [2024-06-20 17:36:31,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1695326876, now seen corresponding path program 20 times [2024-06-20 17:36:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:31,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497038526] [2024-06-20 17:36:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:31,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497038526] [2024-06-20 17:36:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497038526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:34,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:34,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978086992] [2024-06-20 17:36:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:34,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:34,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 346 transitions, 3774 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) [2024-06-20 17:36:34,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:34,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:34,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:36,208 INFO L124 PetriNetUnfolderBase]: 3303/5325 cut-off events. [2024-06-20 17:36:36,208 INFO L125 PetriNetUnfolderBase]: For 574444/574444 co-relation queries the response was YES. [2024-06-20 17:36:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35148 conditions, 5325 events. 3303/5325 cut-off events. For 574444/574444 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32696 event pairs, 799 based on Foata normal form. 4/5322 useless extension candidates. Maximal degree in co-relation 34999. Up to 4422 conditions per place. [2024-06-20 17:36:36,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 116 changer transitions 0/382 dead transitions. [2024-06-20 17:36:36,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 382 transitions, 5166 flow [2024-06-20 17:36:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:36:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:36:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 17:36:36,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-20 17:36:36,273 INFO L175 Difference]: Start difference. First operand has 332 places, 346 transitions, 3774 flow. Second operand 11 states and 184 transitions. [2024-06-20 17:36:36,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 382 transitions, 5166 flow [2024-06-20 17:36:38,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 382 transitions, 5024 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-20 17:36:38,854 INFO L231 Difference]: Finished difference. Result has 329 places, 352 transitions, 4000 flow [2024-06-20 17:36:38,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4000, PETRI_PLACES=329, PETRI_TRANSITIONS=352} [2024-06-20 17:36:38,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 17:36:38,855 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 352 transitions, 4000 flow [2024-06-20 17:36:38,855 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) [2024-06-20 17:36:38,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:38,855 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] [2024-06-20 17:36:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:36:38,855 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)] === [2024-06-20 17:36:38,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1564791248, now seen corresponding path program 21 times [2024-06-20 17:36:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:38,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388932306] [2024-06-20 17:36:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:41,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388932306] [2024-06-20 17:36:41,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388932306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:41,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:41,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:41,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592914209] [2024-06-20 17:36:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:41,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:41,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:41,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 352 transitions, 4000 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) [2024-06-20 17:36:41,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:41,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:41,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:43,829 INFO L124 PetriNetUnfolderBase]: 3291/5311 cut-off events. [2024-06-20 17:36:43,829 INFO L125 PetriNetUnfolderBase]: For 560908/560908 co-relation queries the response was YES. [2024-06-20 17:36:43,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34943 conditions, 5311 events. 3291/5311 cut-off events. For 560908/560908 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32653 event pairs, 793 based on Foata normal form. 4/5308 useless extension candidates. Maximal degree in co-relation 34793. Up to 4414 conditions per place. [2024-06-20 17:36:43,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 117 changer transitions 0/381 dead transitions. [2024-06-20 17:36:43,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 381 transitions, 5040 flow [2024-06-20 17:36:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:36:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:36:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 17:36:43,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 17:36:43,894 INFO L175 Difference]: Start difference. First operand has 329 places, 352 transitions, 4000 flow. Second operand 11 states and 183 transitions. [2024-06-20 17:36:43,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 381 transitions, 5040 flow [2024-06-20 17:36:46,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 381 transitions, 4518 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-06-20 17:36:46,278 INFO L231 Difference]: Finished difference. Result has 329 places, 352 transitions, 3718 flow [2024-06-20 17:36:46,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3718, PETRI_PLACES=329, PETRI_TRANSITIONS=352} [2024-06-20 17:36:46,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 17:36:46,279 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 352 transitions, 3718 flow [2024-06-20 17:36:46,279 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) [2024-06-20 17:36:46,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:46,279 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] [2024-06-20 17:36:46,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:36:46,279 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)] === [2024-06-20 17:36:46,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1427340038, now seen corresponding path program 22 times [2024-06-20 17:36:46,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:46,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295587225] [2024-06-20 17:36:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:46,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295587225] [2024-06-20 17:36:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295587225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431336880] [2024-06-20 17:36:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:49,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:49,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 352 transitions, 3718 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) [2024-06-20 17:36:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:51,464 INFO L124 PetriNetUnfolderBase]: 3279/5295 cut-off events. [2024-06-20 17:36:51,465 INFO L125 PetriNetUnfolderBase]: For 539881/539881 co-relation queries the response was YES. [2024-06-20 17:36:51,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33995 conditions, 5295 events. 3279/5295 cut-off events. For 539881/539881 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32571 event pairs, 795 based on Foata normal form. 4/5292 useless extension candidates. Maximal degree in co-relation 33845. Up to 4406 conditions per place. [2024-06-20 17:36:51,637 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 120 changer transitions 0/382 dead transitions. [2024-06-20 17:36:51,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 382 transitions, 4540 flow [2024-06-20 17:36:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:36:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:36:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-20 17:36:51,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:36:51,638 INFO L175 Difference]: Start difference. First operand has 329 places, 352 transitions, 3718 flow. Second operand 12 states and 195 transitions. [2024-06-20 17:36:51,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 382 transitions, 4540 flow [2024-06-20 17:36:54,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 382 transitions, 4240 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 17:36:54,098 INFO L231 Difference]: Finished difference. Result has 331 places, 352 transitions, 3664 flow [2024-06-20 17:36:54,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3664, PETRI_PLACES=331, PETRI_TRANSITIONS=352} [2024-06-20 17:36:54,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 17:36:54,099 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 352 transitions, 3664 flow [2024-06-20 17:36:54,099 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) [2024-06-20 17:36:54,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:54,099 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] [2024-06-20 17:36:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:36:54,100 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)] === [2024-06-20 17:36:54,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1400589554, now seen corresponding path program 7 times [2024-06-20 17:36:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403583175] [2024-06-20 17:36:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:57,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:57,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403583175] [2024-06-20 17:36:57,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403583175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:57,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:57,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:36:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605986826] [2024-06-20 17:36:57,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:57,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:36:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:36:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:36:57,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:36:57,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 352 transitions, 3664 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) [2024-06-20 17:36:57,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:57,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:36:57,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:59,597 INFO L124 PetriNetUnfolderBase]: 3379/5457 cut-off events. [2024-06-20 17:36:59,597 INFO L125 PetriNetUnfolderBase]: For 651031/651031 co-relation queries the response was YES. [2024-06-20 17:36:59,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36234 conditions, 5457 events. 3379/5457 cut-off events. For 651031/651031 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33670 event pairs, 662 based on Foata normal form. 8/5462 useless extension candidates. Maximal degree in co-relation 36083. Up to 4500 conditions per place. [2024-06-20 17:36:59,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 96 changer transitions 0/397 dead transitions. [2024-06-20 17:36:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 397 transitions, 4870 flow [2024-06-20 17:36:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:36:59,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:36:59,659 INFO L175 Difference]: Start difference. First operand has 331 places, 352 transitions, 3664 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:36:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 397 transitions, 4870 flow [2024-06-20 17:37:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 397 transitions, 4578 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 17:37:01,775 INFO L231 Difference]: Finished difference. Result has 328 places, 354 transitions, 3610 flow [2024-06-20 17:37:01,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3610, PETRI_PLACES=328, PETRI_TRANSITIONS=354} [2024-06-20 17:37:01,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-20 17:37:01,776 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 354 transitions, 3610 flow [2024-06-20 17:37:01,776 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) [2024-06-20 17:37:01,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:01,776 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] [2024-06-20 17:37:01,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:37:01,777 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)] === [2024-06-20 17:37:01,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1266869376, now seen corresponding path program 8 times [2024-06-20 17:37:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168713868] [2024-06-20 17:37:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:05,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168713868] [2024-06-20 17:37:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168713868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:05,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:05,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:05,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959401381] [2024-06-20 17:37:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:05,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:05,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:05,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 354 transitions, 3610 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) [2024-06-20 17:37:05,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:05,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:05,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:07,032 INFO L124 PetriNetUnfolderBase]: 3423/5529 cut-off events. [2024-06-20 17:37:07,032 INFO L125 PetriNetUnfolderBase]: For 689826/689826 co-relation queries the response was YES. [2024-06-20 17:37:07,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36767 conditions, 5529 events. 3423/5529 cut-off events. For 689826/689826 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34158 event pairs, 688 based on Foata normal form. 12/5538 useless extension candidates. Maximal degree in co-relation 36615. Up to 4728 conditions per place. [2024-06-20 17:37:07,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 90 changer transitions 0/391 dead transitions. [2024-06-20 17:37:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 391 transitions, 4530 flow [2024-06-20 17:37:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:37:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:37:07,113 INFO L175 Difference]: Start difference. First operand has 328 places, 354 transitions, 3610 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:37:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 391 transitions, 4530 flow [2024-06-20 17:37:09,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 391 transitions, 4400 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:37:09,552 INFO L231 Difference]: Finished difference. Result has 332 places, 355 transitions, 3689 flow [2024-06-20 17:37:09,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3689, PETRI_PLACES=332, PETRI_TRANSITIONS=355} [2024-06-20 17:37:09,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 17:37:09,553 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 355 transitions, 3689 flow [2024-06-20 17:37:09,553 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) [2024-06-20 17:37:09,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:09,553 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] [2024-06-20 17:37:09,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:37:09,554 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)] === [2024-06-20 17:37:09,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash -419576888, now seen corresponding path program 9 times [2024-06-20 17:37:09,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:09,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200382029] [2024-06-20 17:37:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:09,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200382029] [2024-06-20 17:37:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200382029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:13,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373806914] [2024-06-20 17:37:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:13,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:13,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 355 transitions, 3689 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) [2024-06-20 17:37:13,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:15,325 INFO L124 PetriNetUnfolderBase]: 3451/5573 cut-off events. [2024-06-20 17:37:15,325 INFO L125 PetriNetUnfolderBase]: For 674254/674254 co-relation queries the response was YES. [2024-06-20 17:37:15,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37283 conditions, 5573 events. 3451/5573 cut-off events. For 674254/674254 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34408 event pairs, 686 based on Foata normal form. 8/5578 useless extension candidates. Maximal degree in co-relation 37129. Up to 4734 conditions per place. [2024-06-20 17:37:15,384 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 92 changer transitions 0/395 dead transitions. [2024-06-20 17:37:15,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 395 transitions, 4633 flow [2024-06-20 17:37:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:37:15,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:37:15,385 INFO L175 Difference]: Start difference. First operand has 332 places, 355 transitions, 3689 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:37:15,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 395 transitions, 4633 flow [2024-06-20 17:37:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 395 transitions, 4448 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:37:17,713 INFO L231 Difference]: Finished difference. Result has 334 places, 356 transitions, 3714 flow [2024-06-20 17:37:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3714, PETRI_PLACES=334, PETRI_TRANSITIONS=356} [2024-06-20 17:37:17,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 17:37:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 356 transitions, 3714 flow [2024-06-20 17:37:17,714 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) [2024-06-20 17:37:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:17,714 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] [2024-06-20 17:37:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:37:17,714 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)] === [2024-06-20 17:37:17,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1065464166, now seen corresponding path program 10 times [2024-06-20 17:37:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:17,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81128177] [2024-06-20 17:37:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:20,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81128177] [2024-06-20 17:37:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81128177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:20,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165706522] [2024-06-20 17:37:20,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:20,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 356 transitions, 3714 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) [2024-06-20 17:37:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:20,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:20,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:22,900 INFO L124 PetriNetUnfolderBase]: 3525/5689 cut-off events. [2024-06-20 17:37:22,901 INFO L125 PetriNetUnfolderBase]: For 740225/740225 co-relation queries the response was YES. [2024-06-20 17:37:22,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39018 conditions, 5689 events. 3525/5689 cut-off events. For 740225/740225 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35324 event pairs, 666 based on Foata normal form. 8/5694 useless extension candidates. Maximal degree in co-relation 38863. Up to 3776 conditions per place. [2024-06-20 17:37:22,967 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 119 changer transitions 0/406 dead transitions. [2024-06-20 17:37:22,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 406 transitions, 5228 flow [2024-06-20 17:37:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:37:22,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:37:22,969 INFO L175 Difference]: Start difference. First operand has 334 places, 356 transitions, 3714 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:37:22,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 406 transitions, 5228 flow [2024-06-20 17:37:25,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 406 transitions, 5032 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:37:25,675 INFO L231 Difference]: Finished difference. Result has 336 places, 358 transitions, 3806 flow [2024-06-20 17:37:25,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3806, PETRI_PLACES=336, PETRI_TRANSITIONS=358} [2024-06-20 17:37:25,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 17:37:25,676 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 358 transitions, 3806 flow [2024-06-20 17:37:25,676 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) [2024-06-20 17:37:25,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:25,676 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] [2024-06-20 17:37:25,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:37:25,676 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)] === [2024-06-20 17:37:25,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -711201126, now seen corresponding path program 11 times [2024-06-20 17:37:25,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:25,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051572799] [2024-06-20 17:37:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:25,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:29,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051572799] [2024-06-20 17:37:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051572799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:29,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:29,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:29,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160442794] [2024-06-20 17:37:29,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:29,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:29,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 358 transitions, 3806 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) [2024-06-20 17:37:29,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:29,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:29,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:31,342 INFO L124 PetriNetUnfolderBase]: 3599/5827 cut-off events. [2024-06-20 17:37:31,342 INFO L125 PetriNetUnfolderBase]: For 809547/809547 co-relation queries the response was YES. [2024-06-20 17:37:31,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 5827 events. 3599/5827 cut-off events. For 809547/809547 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36453 event pairs, 670 based on Foata normal form. 8/5832 useless extension candidates. Maximal degree in co-relation 40993. Up to 3816 conditions per place. [2024-06-20 17:37:31,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 118 changer transitions 0/405 dead transitions. [2024-06-20 17:37:31,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 405 transitions, 5302 flow [2024-06-20 17:37:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:37:31,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:37:31,416 INFO L175 Difference]: Start difference. First operand has 336 places, 358 transitions, 3806 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:37:31,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 405 transitions, 5302 flow [2024-06-20 17:37:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 405 transitions, 5036 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:37:34,548 INFO L231 Difference]: Finished difference. Result has 339 places, 360 transitions, 3828 flow [2024-06-20 17:37:34,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3828, PETRI_PLACES=339, PETRI_TRANSITIONS=360} [2024-06-20 17:37:34,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 17:37:34,549 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 360 transitions, 3828 flow [2024-06-20 17:37:34,549 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) [2024-06-20 17:37:34,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:34,549 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] [2024-06-20 17:37:34,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:37:34,550 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)] === [2024-06-20 17:37:34,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -891095156, now seen corresponding path program 12 times [2024-06-20 17:37:34,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:34,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331999993] [2024-06-20 17:37:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:37,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:37,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331999993] [2024-06-20 17:37:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331999993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:37,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:37,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765464819] [2024-06-20 17:37:37,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:37,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:37,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:37,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:37,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 360 transitions, 3828 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) [2024-06-20 17:37:37,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:37,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:37,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:39,881 INFO L124 PetriNetUnfolderBase]: 3581/5782 cut-off events. [2024-06-20 17:37:39,881 INFO L125 PetriNetUnfolderBase]: For 763928/763928 co-relation queries the response was YES. [2024-06-20 17:37:39,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40011 conditions, 5782 events. 3581/5782 cut-off events. For 763928/763928 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 36026 event pairs, 798 based on Foata normal form. 8/5789 useless extension candidates. Maximal degree in co-relation 39854. Up to 5103 conditions per place. [2024-06-20 17:37:39,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 35 changer transitions 0/400 dead transitions. [2024-06-20 17:37:39,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 400 transitions, 4776 flow [2024-06-20 17:37:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:37:39,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:37:39,949 INFO L175 Difference]: Start difference. First operand has 339 places, 360 transitions, 3828 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:37:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 400 transitions, 4776 flow [2024-06-20 17:37:42,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 400 transitions, 4591 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:37:42,380 INFO L231 Difference]: Finished difference. Result has 343 places, 360 transitions, 3717 flow [2024-06-20 17:37:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3643, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3717, PETRI_PLACES=343, PETRI_TRANSITIONS=360} [2024-06-20 17:37:42,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-20 17:37:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 360 transitions, 3717 flow [2024-06-20 17:37:42,381 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) [2024-06-20 17:37:42,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:42,381 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] [2024-06-20 17:37:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:37:42,381 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)] === [2024-06-20 17:37:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1660142848, now seen corresponding path program 13 times [2024-06-20 17:37:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382124719] [2024-06-20 17:37:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382124719] [2024-06-20 17:37:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382124719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:46,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:46,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177586979] [2024-06-20 17:37:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:46,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:46,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 360 transitions, 3717 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) [2024-06-20 17:37:46,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:46,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:46,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:48,356 INFO L124 PetriNetUnfolderBase]: 3625/5871 cut-off events. [2024-06-20 17:37:48,357 INFO L125 PetriNetUnfolderBase]: For 804318/804318 co-relation queries the response was YES. [2024-06-20 17:37:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40019 conditions, 5871 events. 3625/5871 cut-off events. For 804318/804318 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36879 event pairs, 766 based on Foata normal form. 12/5880 useless extension candidates. Maximal degree in co-relation 39861. Up to 5042 conditions per place. [2024-06-20 17:37:48,422 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 301 selfloop transitions, 88 changer transitions 0/394 dead transitions. [2024-06-20 17:37:48,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 394 transitions, 4634 flow [2024-06-20 17:37:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:37:48,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:37:48,424 INFO L175 Difference]: Start difference. First operand has 343 places, 360 transitions, 3717 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:37:48,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 394 transitions, 4634 flow [2024-06-20 17:37:51,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 394 transitions, 4543 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:37:51,458 INFO L231 Difference]: Finished difference. Result has 344 places, 361 transitions, 3832 flow [2024-06-20 17:37:51,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3832, PETRI_PLACES=344, PETRI_TRANSITIONS=361} [2024-06-20 17:37:51,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-20 17:37:51,459 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 361 transitions, 3832 flow [2024-06-20 17:37:51,459 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) [2024-06-20 17:37:51,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:51,459 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] [2024-06-20 17:37:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:37:51,460 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)] === [2024-06-20 17:37:51,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1655133166, now seen corresponding path program 14 times [2024-06-20 17:37:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:51,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231443530] [2024-06-20 17:37:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:54,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:54,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231443530] [2024-06-20 17:37:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231443530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:54,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:54,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516762633] [2024-06-20 17:37:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:54,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:54,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:54,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:37:54,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 361 transitions, 3832 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) [2024-06-20 17:37:54,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:54,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:37:54,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:57,143 INFO L124 PetriNetUnfolderBase]: 3669/5936 cut-off events. [2024-06-20 17:37:57,143 INFO L125 PetriNetUnfolderBase]: For 819991/819991 co-relation queries the response was YES. [2024-06-20 17:37:57,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40773 conditions, 5936 events. 3669/5936 cut-off events. For 819991/819991 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37264 event pairs, 905 based on Foata normal form. 12/5947 useless extension candidates. Maximal degree in co-relation 40614. Up to 5433 conditions per place. [2024-06-20 17:37:57,219 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 30 changer transitions 0/394 dead transitions. [2024-06-20 17:37:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 394 transitions, 4749 flow [2024-06-20 17:37:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:37:57,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:37:57,221 INFO L175 Difference]: Start difference. First operand has 344 places, 361 transitions, 3832 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:37:57,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 394 transitions, 4749 flow [2024-06-20 17:37:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 394 transitions, 4564 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:37:59,979 INFO L231 Difference]: Finished difference. Result has 346 places, 362 transitions, 3739 flow [2024-06-20 17:37:59,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3739, PETRI_PLACES=346, PETRI_TRANSITIONS=362} [2024-06-20 17:37:59,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-20 17:37:59,980 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 362 transitions, 3739 flow [2024-06-20 17:37:59,988 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) [2024-06-20 17:37:59,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:59,989 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] [2024-06-20 17:37:59,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:37:59,989 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)] === [2024-06-20 17:37:59,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 913345714, now seen corresponding path program 15 times [2024-06-20 17:37:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044844138] [2024-06-20 17:37:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:03,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044844138] [2024-06-20 17:38:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044844138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:03,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:03,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048014458] [2024-06-20 17:38:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:03,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:03,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 362 transitions, 3739 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) [2024-06-20 17:38:03,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:03,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:03,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:05,863 INFO L124 PetriNetUnfolderBase]: 3741/6056 cut-off events. [2024-06-20 17:38:05,864 INFO L125 PetriNetUnfolderBase]: For 832148/832148 co-relation queries the response was YES. [2024-06-20 17:38:05,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41158 conditions, 6056 events. 3741/6056 cut-off events. For 832148/832148 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 38266 event pairs, 899 based on Foata normal form. 12/6067 useless extension candidates. Maximal degree in co-relation 40998. Up to 5425 conditions per place. [2024-06-20 17:38:05,935 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2024-06-20 17:38:05,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 403 transitions, 4733 flow [2024-06-20 17:38:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:38:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:38:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:38:05,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:38:05,936 INFO L175 Difference]: Start difference. First operand has 346 places, 362 transitions, 3739 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:38:05,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 403 transitions, 4733 flow [2024-06-20 17:38:09,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 403 transitions, 4662 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:38:09,293 INFO L231 Difference]: Finished difference. Result has 350 places, 364 transitions, 3778 flow [2024-06-20 17:38:09,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3778, PETRI_PLACES=350, PETRI_TRANSITIONS=364} [2024-06-20 17:38:09,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-20 17:38:09,293 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 364 transitions, 3778 flow [2024-06-20 17:38:09,294 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) [2024-06-20 17:38:09,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:09,294 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] [2024-06-20 17:38:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:38:09,294 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)] === [2024-06-20 17:38:09,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1080468054, now seen corresponding path program 16 times [2024-06-20 17:38:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181394958] [2024-06-20 17:38:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:12,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:12,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181394958] [2024-06-20 17:38:12,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181394958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:12,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:12,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881676313] [2024-06-20 17:38:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:12,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:12,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:12,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:12,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 364 transitions, 3778 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) [2024-06-20 17:38:12,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:12,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:14,923 INFO L124 PetriNetUnfolderBase]: 3769/6103 cut-off events. [2024-06-20 17:38:14,924 INFO L125 PetriNetUnfolderBase]: For 819700/819700 co-relation queries the response was YES. [2024-06-20 17:38:14,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41577 conditions, 6103 events. 3769/6103 cut-off events. For 819700/819700 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 38695 event pairs, 792 based on Foata normal form. 8/6108 useless extension candidates. Maximal degree in co-relation 41415. Up to 5176 conditions per place. [2024-06-20 17:38:15,000 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 91 changer transitions 0/400 dead transitions. [2024-06-20 17:38:15,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 400 transitions, 4727 flow [2024-06-20 17:38:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:38:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:38:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:38:15,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:38:15,002 INFO L175 Difference]: Start difference. First operand has 350 places, 364 transitions, 3778 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:38:15,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 400 transitions, 4727 flow [2024-06-20 17:38:17,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 400 transitions, 4661 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:38:17,938 INFO L231 Difference]: Finished difference. Result has 352 places, 365 transitions, 3927 flow [2024-06-20 17:38:17,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3927, PETRI_PLACES=352, PETRI_TRANSITIONS=365} [2024-06-20 17:38:17,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 17:38:17,938 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 365 transitions, 3927 flow [2024-06-20 17:38:17,938 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) [2024-06-20 17:38:17,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:17,939 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] [2024-06-20 17:38:17,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:38:17,939 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)] === [2024-06-20 17:38:17,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -639382510, now seen corresponding path program 17 times [2024-06-20 17:38:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:17,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082389910] [2024-06-20 17:38:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:21,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082389910] [2024-06-20 17:38:21,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082389910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:21,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:21,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723477748] [2024-06-20 17:38:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:21,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:21,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 365 transitions, 3927 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) [2024-06-20 17:38:21,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:21,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:21,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:23,322 INFO L124 PetriNetUnfolderBase]: 3843/6247 cut-off events. [2024-06-20 17:38:23,323 INFO L125 PetriNetUnfolderBase]: For 891013/891013 co-relation queries the response was YES. [2024-06-20 17:38:23,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43564 conditions, 6247 events. 3843/6247 cut-off events. For 891013/891013 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 39916 event pairs, 788 based on Foata normal form. 8/6252 useless extension candidates. Maximal degree in co-relation 43401. Up to 4850 conditions per place. [2024-06-20 17:38:23,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 102 changer transitions 0/407 dead transitions. [2024-06-20 17:38:23,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 407 transitions, 5199 flow [2024-06-20 17:38:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:38:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:38:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:38:23,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:38:23,404 INFO L175 Difference]: Start difference. First operand has 352 places, 365 transitions, 3927 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:38:23,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 407 transitions, 5199 flow [2024-06-20 17:38:26,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 407 transitions, 4999 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:38:26,666 INFO L231 Difference]: Finished difference. Result has 354 places, 367 transitions, 3979 flow [2024-06-20 17:38:26,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3979, PETRI_PLACES=354, PETRI_TRANSITIONS=367} [2024-06-20 17:38:26,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-20 17:38:26,667 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 367 transitions, 3979 flow [2024-06-20 17:38:26,667 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) [2024-06-20 17:38:26,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:26,667 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, 1] [2024-06-20 17:38:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:38:26,667 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)] === [2024-06-20 17:38:26,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1650937708, now seen corresponding path program 18 times [2024-06-20 17:38:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:26,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252390993] [2024-06-20 17:38:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:30,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252390993] [2024-06-20 17:38:30,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252390993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:30,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:30,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:30,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873201775] [2024-06-20 17:38:30,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:30,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:30,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:30,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 367 transitions, 3979 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) [2024-06-20 17:38:30,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:30,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:32,762 INFO L124 PetriNetUnfolderBase]: 3825/6196 cut-off events. [2024-06-20 17:38:32,762 INFO L125 PetriNetUnfolderBase]: For 843506/843506 co-relation queries the response was YES. [2024-06-20 17:38:32,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42594 conditions, 6196 events. 3825/6196 cut-off events. For 843506/843506 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 39402 event pairs, 919 based on Foata normal form. 8/6203 useless extension candidates. Maximal degree in co-relation 42430. Up to 5615 conditions per place. [2024-06-20 17:38:32,843 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 30 changer transitions 0/404 dead transitions. [2024-06-20 17:38:32,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 404 transitions, 4925 flow [2024-06-20 17:38:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:38:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:38:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:38:32,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:38:32,845 INFO L175 Difference]: Start difference. First operand has 354 places, 367 transitions, 3979 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:38:32,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 404 transitions, 4925 flow [2024-06-20 17:38:35,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 404 transitions, 4781 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:38:35,864 INFO L231 Difference]: Finished difference. Result has 358 places, 367 transitions, 3899 flow [2024-06-20 17:38:35,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3835, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3899, PETRI_PLACES=358, PETRI_TRANSITIONS=367} [2024-06-20 17:38:35,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-20 17:38:35,865 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 367 transitions, 3899 flow [2024-06-20 17:38:35,865 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) [2024-06-20 17:38:35,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:35,865 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] [2024-06-20 17:38:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:38:35,865 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)] === [2024-06-20 17:38:35,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1404743554, now seen corresponding path program 19 times [2024-06-20 17:38:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650142733] [2024-06-20 17:38:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:39,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650142733] [2024-06-20 17:38:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650142733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:39,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410721025] [2024-06-20 17:38:39,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 367 transitions, 3899 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) [2024-06-20 17:38:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:42,077 INFO L124 PetriNetUnfolderBase]: 3869/6264 cut-off events. [2024-06-20 17:38:42,078 INFO L125 PetriNetUnfolderBase]: For 889482/889482 co-relation queries the response was YES. [2024-06-20 17:38:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43156 conditions, 6264 events. 3869/6264 cut-off events. For 889482/889482 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 39981 event pairs, 1098 based on Foata normal form. 12/6275 useless extension candidates. Maximal degree in co-relation 42990. Up to 5747 conditions per place. [2024-06-20 17:38:42,153 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 33 changer transitions 0/404 dead transitions. [2024-06-20 17:38:42,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 404 transitions, 4844 flow [2024-06-20 17:38:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:38:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:38:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2024-06-20 17:38:42,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-20 17:38:42,180 INFO L175 Difference]: Start difference. First operand has 358 places, 367 transitions, 3899 flow. Second operand 13 states and 196 transitions. [2024-06-20 17:38:42,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 404 transitions, 4844 flow [2024-06-20 17:38:46,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 404 transitions, 4757 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:38:46,026 INFO L231 Difference]: Finished difference. Result has 363 places, 368 transitions, 3914 flow [2024-06-20 17:38:46,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3914, PETRI_PLACES=363, PETRI_TRANSITIONS=368} [2024-06-20 17:38:46,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 17:38:46,026 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 368 transitions, 3914 flow [2024-06-20 17:38:46,026 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) [2024-06-20 17:38:46,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:46,027 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] [2024-06-20 17:38:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:38:46,029 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)] === [2024-06-20 17:38:46,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 488168506, now seen corresponding path program 20 times [2024-06-20 17:38:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679429244] [2024-06-20 17:38:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679429244] [2024-06-20 17:38:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679429244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:49,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312543] [2024-06-20 17:38:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:49,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:49,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 368 transitions, 3914 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) [2024-06-20 17:38:49,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:49,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:49,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:51,516 INFO L124 PetriNetUnfolderBase]: 3913/6291 cut-off events. [2024-06-20 17:38:51,517 INFO L125 PetriNetUnfolderBase]: For 906987/906987 co-relation queries the response was YES. [2024-06-20 17:38:51,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43611 conditions, 6291 events. 3913/6291 cut-off events. For 906987/906987 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39821 event pairs, 1017 based on Foata normal form. 12/6296 useless extension candidates. Maximal degree in co-relation 43445. Up to 5568 conditions per place. [2024-06-20 17:38:51,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 84 changer transitions 0/396 dead transitions. [2024-06-20 17:38:51,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 396 transitions, 4827 flow [2024-06-20 17:38:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:38:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:38:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:38:51,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:38:51,594 INFO L175 Difference]: Start difference. First operand has 363 places, 368 transitions, 3914 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:38:51,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 396 transitions, 4827 flow [2024-06-20 17:38:55,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 396 transitions, 4746 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 17:38:55,161 INFO L231 Difference]: Finished difference. Result has 361 places, 369 transitions, 4039 flow [2024-06-20 17:38:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4039, PETRI_PLACES=361, PETRI_TRANSITIONS=369} [2024-06-20 17:38:55,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-20 17:38:55,162 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 369 transitions, 4039 flow [2024-06-20 17:38:55,162 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) [2024-06-20 17:38:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:55,163 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, 1] [2024-06-20 17:38:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:38:55,163 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)] === [2024-06-20 17:38:55,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1680017494, now seen corresponding path program 2 times [2024-06-20 17:38:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581375770] [2024-06-20 17:38:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581375770] [2024-06-20 17:38:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581375770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:58,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:58,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:38:58,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959467495] [2024-06-20 17:38:58,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:38:58,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:58,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:38:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:38:58,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:38:58,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 369 transitions, 4039 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) [2024-06-20 17:38:58,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:58,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:38:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:01,187 INFO L124 PetriNetUnfolderBase]: 3957/6400 cut-off events. [2024-06-20 17:39:01,187 INFO L125 PetriNetUnfolderBase]: For 920791/920791 co-relation queries the response was YES. [2024-06-20 17:39:01,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44369 conditions, 6400 events. 3957/6400 cut-off events. For 920791/920791 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40895 event pairs, 1118 based on Foata normal form. 12/6411 useless extension candidates. Maximal degree in co-relation 44202. Up to 5883 conditions per place. [2024-06-20 17:39:01,270 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 33 changer transitions 0/400 dead transitions. [2024-06-20 17:39:01,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 400 transitions, 4965 flow [2024-06-20 17:39:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:39:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:39:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-20 17:39:01,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 17:39:01,272 INFO L175 Difference]: Start difference. First operand has 361 places, 369 transitions, 4039 flow. Second operand 11 states and 168 transitions. [2024-06-20 17:39:01,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 400 transitions, 4965 flow [2024-06-20 17:39:05,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 400 transitions, 4780 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:39:05,363 INFO L231 Difference]: Finished difference. Result has 365 places, 370 transitions, 3957 flow [2024-06-20 17:39:05,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3957, PETRI_PLACES=365, PETRI_TRANSITIONS=370} [2024-06-20 17:39:05,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 17:39:05,364 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 370 transitions, 3957 flow [2024-06-20 17:39:05,364 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) [2024-06-20 17:39:05,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:05,365 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] [2024-06-20 17:39:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:39:05,365 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)] === [2024-06-20 17:39:05,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2092362706, now seen corresponding path program 21 times [2024-06-20 17:39:05,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:05,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694928619] [2024-06-20 17:39:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:05,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694928619] [2024-06-20 17:39:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694928619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:08,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:39:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642482640] [2024-06-20 17:39:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:39:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:39:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:39:09,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:39:09,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 370 transitions, 3957 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) [2024-06-20 17:39:09,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:09,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:39:09,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:11,290 INFO L124 PetriNetUnfolderBase]: 4141/6659 cut-off events. [2024-06-20 17:39:11,290 INFO L125 PetriNetUnfolderBase]: For 1298629/1298629 co-relation queries the response was YES. [2024-06-20 17:39:11,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45713 conditions, 6659 events. 4141/6659 cut-off events. For 1298629/1298629 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 42337 event pairs, 1077 based on Foata normal form. 56/6708 useless extension candidates. Maximal degree in co-relation 45545. Up to 5688 conditions per place. [2024-06-20 17:39:11,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 83 changer transitions 6/405 dead transitions. [2024-06-20 17:39:11,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 405 transitions, 4925 flow [2024-06-20 17:39:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:39:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:39:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-20 17:39:11,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-20 17:39:11,378 INFO L175 Difference]: Start difference. First operand has 365 places, 370 transitions, 3957 flow. Second operand 11 states and 184 transitions. [2024-06-20 17:39:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 405 transitions, 4925 flow [2024-06-20 17:39:15,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 405 transitions, 4844 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:39:15,085 INFO L231 Difference]: Finished difference. Result has 367 places, 367 transitions, 4055 flow [2024-06-20 17:39:15,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4055, PETRI_PLACES=367, PETRI_TRANSITIONS=367} [2024-06-20 17:39:15,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-20 17:39:15,086 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 367 transitions, 4055 flow [2024-06-20 17:39:15,086 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) [2024-06-20 17:39:15,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:15,086 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] [2024-06-20 17:39:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:39:15,086 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)] === [2024-06-20 17:39:15,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash 640327156, now seen corresponding path program 22 times [2024-06-20 17:39:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507647761] [2024-06-20 17:39:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:18,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:18,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507647761] [2024-06-20 17:39:18,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507647761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:18,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:18,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:39:18,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075762309] [2024-06-20 17:39:18,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:18,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:39:18,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:39:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:39:18,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:39:18,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 367 transitions, 4055 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) [2024-06-20 17:39:18,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:18,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:39:18,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:20,994 INFO L124 PetriNetUnfolderBase]: 4361/7011 cut-off events. [2024-06-20 17:39:20,994 INFO L125 PetriNetUnfolderBase]: For 1613191/1613191 co-relation queries the response was YES. [2024-06-20 17:39:21,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53314 conditions, 7011 events. 4361/7011 cut-off events. For 1613191/1613191 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 44740 event pairs, 1123 based on Foata normal form. 48/7052 useless extension candidates. Maximal degree in co-relation 53145. Up to 5468 conditions per place. [2024-06-20 17:39:21,088 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 84 changer transitions 8/409 dead transitions. [2024-06-20 17:39:21,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 409 transitions, 5365 flow [2024-06-20 17:39:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:39:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:39:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-20 17:39:21,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 17:39:21,089 INFO L175 Difference]: Start difference. First operand has 367 places, 367 transitions, 4055 flow. Second operand 11 states and 189 transitions. [2024-06-20 17:39:21,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 409 transitions, 5365 flow [2024-06-20 17:39:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 409 transitions, 5182 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:39:27,083 INFO L231 Difference]: Finished difference. Result has 369 places, 364 transitions, 4021 flow [2024-06-20 17:39:27,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4021, PETRI_PLACES=369, PETRI_TRANSITIONS=364} [2024-06-20 17:39:27,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-20 17:39:27,084 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 364 transitions, 4021 flow [2024-06-20 17:39:27,084 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) [2024-06-20 17:39:27,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:27,084 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] [2024-06-20 17:39:27,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:39:27,085 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)] === [2024-06-20 17:39:27,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2073706770, now seen corresponding path program 23 times [2024-06-20 17:39:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548210413] [2024-06-20 17:39:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:30,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:30,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548210413] [2024-06-20 17:39:30,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548210413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:30,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:30,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:39:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638857578] [2024-06-20 17:39:30,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:39:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:39:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:39:30,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:39:30,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 364 transitions, 4021 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) [2024-06-20 17:39:30,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:30,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:39:30,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:33,001 INFO L124 PetriNetUnfolderBase]: 4211/6810 cut-off events. [2024-06-20 17:39:33,001 INFO L125 PetriNetUnfolderBase]: For 1301480/1301480 co-relation queries the response was YES. [2024-06-20 17:39:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51718 conditions, 6810 events. 4211/6810 cut-off events. For 1301480/1301480 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43663 event pairs, 1270 based on Foata normal form. 12/6821 useless extension candidates. Maximal degree in co-relation 51548. Up to 6333 conditions per place. [2024-06-20 17:39:33,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 23 changer transitions 0/392 dead transitions. [2024-06-20 17:39:33,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 392 transitions, 4928 flow [2024-06-20 17:39:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:39:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:39:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:39:33,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:39:33,084 INFO L175 Difference]: Start difference. First operand has 369 places, 364 transitions, 4021 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:39:33,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 392 transitions, 4928 flow [2024-06-20 17:39:38,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 392 transitions, 4653 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-20 17:39:38,123 INFO L231 Difference]: Finished difference. Result has 365 places, 365 transitions, 3832 flow [2024-06-20 17:39:38,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3832, PETRI_PLACES=365, PETRI_TRANSITIONS=365} [2024-06-20 17:39:38,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 17:39:38,124 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 365 transitions, 3832 flow [2024-06-20 17:39:38,124 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) [2024-06-20 17:39:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:38,124 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] [2024-06-20 17:39:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:39:38,125 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)] === [2024-06-20 17:39:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash 839776816, now seen corresponding path program 24 times [2024-06-20 17:39:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727855755] [2024-06-20 17:39:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:41,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727855755] [2024-06-20 17:39:41,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727855755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:41,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:41,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:39:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214709873] [2024-06-20 17:39:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:39:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:39:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:39:41,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:39:41,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 365 transitions, 3832 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) [2024-06-20 17:39:41,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:41,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:39:41,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:43,785 INFO L124 PetriNetUnfolderBase]: 4323/6957 cut-off events. [2024-06-20 17:39:43,785 INFO L125 PetriNetUnfolderBase]: For 1593373/1593373 co-relation queries the response was YES. [2024-06-20 17:39:43,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50510 conditions, 6957 events. 4323/6957 cut-off events. For 1593373/1593373 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 44380 event pairs, 1183 based on Foata normal form. 56/7006 useless extension candidates. Maximal degree in co-relation 50339. Up to 6008 conditions per place. [2024-06-20 17:39:43,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 79 changer transitions 6/401 dead transitions. [2024-06-20 17:39:43,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 401 transitions, 4764 flow [2024-06-20 17:39:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:39:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:39:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-20 17:39:43,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-20 17:39:43,874 INFO L175 Difference]: Start difference. First operand has 365 places, 365 transitions, 3832 flow. Second operand 12 states and 197 transitions. [2024-06-20 17:39:43,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 401 transitions, 4764 flow [2024-06-20 17:39:49,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 401 transitions, 4695 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:39:49,360 INFO L231 Difference]: Finished difference. Result has 370 places, 361 transitions, 3892 flow [2024-06-20 17:39:49,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3892, PETRI_PLACES=370, PETRI_TRANSITIONS=361} [2024-06-20 17:39:49,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 17:39:49,361 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 361 transitions, 3892 flow [2024-06-20 17:39:49,361 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) [2024-06-20 17:39:49,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:49,361 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] [2024-06-20 17:39:49,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:39:49,361 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)] === [2024-06-20 17:39:49,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -302787898, now seen corresponding path program 3 times [2024-06-20 17:39:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:49,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774433893] [2024-06-20 17:39:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774433893] [2024-06-20 17:39:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774433893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:52,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:39:52,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562399959] [2024-06-20 17:39:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:39:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:39:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:39:52,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:39:52,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 361 transitions, 3892 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) [2024-06-20 17:39:52,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:52,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:39:52,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:55,506 INFO L124 PetriNetUnfolderBase]: 4247/6894 cut-off events. [2024-06-20 17:39:55,507 INFO L125 PetriNetUnfolderBase]: For 1229057/1229057 co-relation queries the response was YES. [2024-06-20 17:39:55,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50218 conditions, 6894 events. 4247/6894 cut-off events. For 1229057/1229057 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44523 event pairs, 1252 based on Foata normal form. 12/6905 useless extension candidates. Maximal degree in co-relation 50046. Up to 6181 conditions per place. [2024-06-20 17:39:55,599 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 36 changer transitions 0/403 dead transitions. [2024-06-20 17:39:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 403 transitions, 4888 flow [2024-06-20 17:39:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:39:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:39:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-20 17:39:55,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-20 17:39:55,601 INFO L175 Difference]: Start difference. First operand has 370 places, 361 transitions, 3892 flow. Second operand 13 states and 199 transitions. [2024-06-20 17:39:55,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 403 transitions, 4888 flow [2024-06-20 17:40:00,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 403 transitions, 4633 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 17:40:00,475 INFO L231 Difference]: Finished difference. Result has 370 places, 363 transitions, 3762 flow [2024-06-20 17:40:00,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3762, PETRI_PLACES=370, PETRI_TRANSITIONS=363} [2024-06-20 17:40:00,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 17:40:00,476 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 363 transitions, 3762 flow [2024-06-20 17:40:00,476 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) [2024-06-20 17:40:00,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:00,476 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, 1] [2024-06-20 17:40:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:40:00,476 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)] === [2024-06-20 17:40:00,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1665787380, now seen corresponding path program 25 times [2024-06-20 17:40:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:00,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621358277] [2024-06-20 17:40:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:00,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:03,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621358277] [2024-06-20 17:40:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621358277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:03,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076817664] [2024-06-20 17:40:03,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:03,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:04,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:04,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 363 transitions, 3762 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) [2024-06-20 17:40:04,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:04,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:05,856 INFO L124 PetriNetUnfolderBase]: 3997/6467 cut-off events. [2024-06-20 17:40:05,857 INFO L125 PetriNetUnfolderBase]: For 754359/754359 co-relation queries the response was YES. [2024-06-20 17:40:05,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41199 conditions, 6467 events. 3997/6467 cut-off events. For 754359/754359 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 41487 event pairs, 1033 based on Foata normal form. 8/6468 useless extension candidates. Maximal degree in co-relation 41025. Up to 5612 conditions per place. [2024-06-20 17:40:06,098 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 78 changer transitions 0/392 dead transitions. [2024-06-20 17:40:06,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 392 transitions, 4652 flow [2024-06-20 17:40:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:40:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:40:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:40:06,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:40:06,100 INFO L175 Difference]: Start difference. First operand has 370 places, 363 transitions, 3762 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:40:06,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 392 transitions, 4652 flow [2024-06-20 17:40:10,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 392 transitions, 4575 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:40:10,215 INFO L231 Difference]: Finished difference. Result has 369 places, 363 transitions, 3845 flow [2024-06-20 17:40:10,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=369, PETRI_TRANSITIONS=363} [2024-06-20 17:40:10,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-20 17:40:10,216 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 363 transitions, 3845 flow [2024-06-20 17:40:10,216 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) [2024-06-20 17:40:10,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:10,216 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] [2024-06-20 17:40:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:40:10,216 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:10,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2066379286, now seen corresponding path program 4 times [2024-06-20 17:40:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:10,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989690954] [2024-06-20 17:40:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989690954] [2024-06-20 17:40:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989690954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:13,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750408191] [2024-06-20 17:40:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:13,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:13,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 363 transitions, 3845 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) [2024-06-20 17:40:13,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:13,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:13,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:16,030 INFO L124 PetriNetUnfolderBase]: 4025/6562 cut-off events. [2024-06-20 17:40:16,030 INFO L125 PetriNetUnfolderBase]: For 763816/763816 co-relation queries the response was YES. [2024-06-20 17:40:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41683 conditions, 6562 events. 4025/6562 cut-off events. For 763816/763816 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42574 event pairs, 1142 based on Foata normal form. 8/6569 useless extension candidates. Maximal degree in co-relation 41508. Up to 5865 conditions per place. [2024-06-20 17:40:16,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 37 changer transitions 0/398 dead transitions. [2024-06-20 17:40:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 398 transitions, 4825 flow [2024-06-20 17:40:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:40:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:40:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-20 17:40:16,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-20 17:40:16,108 INFO L175 Difference]: Start difference. First operand has 369 places, 363 transitions, 3845 flow. Second operand 11 states and 169 transitions. [2024-06-20 17:40:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 398 transitions, 4825 flow [2024-06-20 17:40:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 398 transitions, 4617 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:40:20,516 INFO L231 Difference]: Finished difference. Result has 373 places, 366 transitions, 3789 flow [2024-06-20 17:40:20,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3789, PETRI_PLACES=373, PETRI_TRANSITIONS=366} [2024-06-20 17:40:20,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-20 17:40:20,522 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 366 transitions, 3789 flow [2024-06-20 17:40:20,522 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) [2024-06-20 17:40:20,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:20,522 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] [2024-06-20 17:40:20,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:40:20,523 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:20,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash -933283250, now seen corresponding path program 5 times [2024-06-20 17:40:20,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:20,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448732650] [2024-06-20 17:40:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448732650] [2024-06-20 17:40:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448732650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:24,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645413368] [2024-06-20 17:40:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:24,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:24,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 366 transitions, 3789 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) [2024-06-20 17:40:24,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:24,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:24,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:26,159 INFO L124 PetriNetUnfolderBase]: 4145/6736 cut-off events. [2024-06-20 17:40:26,160 INFO L125 PetriNetUnfolderBase]: For 919732/919732 co-relation queries the response was YES. [2024-06-20 17:40:26,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44865 conditions, 6736 events. 4145/6736 cut-off events. For 919732/919732 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 43804 event pairs, 1126 based on Foata normal form. 8/6743 useless extension candidates. Maximal degree in co-relation 44688. Up to 5641 conditions per place. [2024-06-20 17:40:26,244 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 45 changer transitions 0/410 dead transitions. [2024-06-20 17:40:26,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 410 transitions, 5422 flow [2024-06-20 17:40:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:40:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:40:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-20 17:40:26,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-20 17:40:26,246 INFO L175 Difference]: Start difference. First operand has 373 places, 366 transitions, 3789 flow. Second operand 12 states and 187 transitions. [2024-06-20 17:40:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 410 transitions, 5422 flow [2024-06-20 17:40:30,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 410 transitions, 5352 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:40:30,955 INFO L231 Difference]: Finished difference. Result has 379 places, 371 transitions, 3948 flow [2024-06-20 17:40:30,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3948, PETRI_PLACES=379, PETRI_TRANSITIONS=371} [2024-06-20 17:40:30,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-20 17:40:30,956 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 371 transitions, 3948 flow [2024-06-20 17:40:30,956 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) [2024-06-20 17:40:30,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:30,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:30,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:40:30,956 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:30,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1772080684, now seen corresponding path program 6 times [2024-06-20 17:40:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:30,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827021016] [2024-06-20 17:40:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:30,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:34,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:34,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827021016] [2024-06-20 17:40:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827021016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639885464] [2024-06-20 17:40:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:34,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:34,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:34,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 371 transitions, 3948 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) [2024-06-20 17:40:34,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:34,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:34,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:36,754 INFO L124 PetriNetUnfolderBase]: 4251/6895 cut-off events. [2024-06-20 17:40:36,755 INFO L125 PetriNetUnfolderBase]: For 1224297/1224297 co-relation queries the response was YES. [2024-06-20 17:40:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45025 conditions, 6895 events. 4251/6895 cut-off events. For 1224297/1224297 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44768 event pairs, 1089 based on Foata normal form. 48/6936 useless extension candidates. Maximal degree in co-relation 44845. Up to 5752 conditions per place. [2024-06-20 17:40:36,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 81 changer transitions 11/415 dead transitions. [2024-06-20 17:40:36,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 415 transitions, 5020 flow [2024-06-20 17:40:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:40:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:40:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-20 17:40:36,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:40:36,847 INFO L175 Difference]: Start difference. First operand has 379 places, 371 transitions, 3948 flow. Second operand 12 states and 201 transitions. [2024-06-20 17:40:36,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 415 transitions, 5020 flow [2024-06-20 17:40:41,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 415 transitions, 4942 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:40:41,219 INFO L231 Difference]: Finished difference. Result has 385 places, 368 transitions, 4023 flow [2024-06-20 17:40:41,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4023, PETRI_PLACES=385, PETRI_TRANSITIONS=368} [2024-06-20 17:40:41,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-20 17:40:41,220 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 368 transitions, 4023 flow [2024-06-20 17:40:41,220 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) [2024-06-20 17:40:41,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:41,220 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] [2024-06-20 17:40:41,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:40:41,220 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:41,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2074003440, now seen corresponding path program 26 times [2024-06-20 17:40:41,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:41,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312231238] [2024-06-20 17:40:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:41,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:44,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312231238] [2024-06-20 17:40:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312231238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:44,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:44,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615149222] [2024-06-20 17:40:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:44,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:44,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 368 transitions, 4023 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) [2024-06-20 17:40:44,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:44,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:46,806 INFO L124 PetriNetUnfolderBase]: 4051/6618 cut-off events. [2024-06-20 17:40:46,807 INFO L125 PetriNetUnfolderBase]: For 796582/796582 co-relation queries the response was YES. [2024-06-20 17:40:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42049 conditions, 6618 events. 4051/6618 cut-off events. For 796582/796582 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43229 event pairs, 1158 based on Foata normal form. 12/6629 useless extension candidates. Maximal degree in co-relation 41866. Up to 5977 conditions per place. [2024-06-20 17:40:46,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 25 changer transitions 0/402 dead transitions. [2024-06-20 17:40:46,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 402 transitions, 4969 flow [2024-06-20 17:40:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:40:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:40:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 17:40:46,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 17:40:46,898 INFO L175 Difference]: Start difference. First operand has 385 places, 368 transitions, 4023 flow. Second operand 10 states and 161 transitions. [2024-06-20 17:40:46,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 402 transitions, 4969 flow [2024-06-20 17:40:51,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 402 transitions, 4692 flow, removed 28 selfloop flow, removed 14 redundant places. [2024-06-20 17:40:51,178 INFO L231 Difference]: Finished difference. Result has 381 places, 368 transitions, 3800 flow [2024-06-20 17:40:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3800, PETRI_PLACES=381, PETRI_TRANSITIONS=368} [2024-06-20 17:40:51,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-20 17:40:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 368 transitions, 3800 flow [2024-06-20 17:40:51,178 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) [2024-06-20 17:40:51,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:51,179 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] [2024-06-20 17:40:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:40:51,179 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900370, now seen corresponding path program 27 times [2024-06-20 17:40:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812357368] [2024-06-20 17:40:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812357368] [2024-06-20 17:40:55,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812357368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:55,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:55,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:40:55,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385266951] [2024-06-20 17:40:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:55,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:40:55,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:40:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:40:55,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:40:55,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 368 transitions, 3800 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) [2024-06-20 17:40:55,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:55,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:40:55,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:57,073 INFO L124 PetriNetUnfolderBase]: 4079/6624 cut-off events. [2024-06-20 17:40:57,074 INFO L125 PetriNetUnfolderBase]: For 771682/771682 co-relation queries the response was YES. [2024-06-20 17:40:57,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41439 conditions, 6624 events. 4079/6624 cut-off events. For 771682/771682 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43007 event pairs, 1144 based on Foata normal form. 8/6631 useless extension candidates. Maximal degree in co-relation 41258. Up to 6027 conditions per place. [2024-06-20 17:40:57,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 24 changer transitions 0/400 dead transitions. [2024-06-20 17:40:57,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 400 transitions, 4749 flow [2024-06-20 17:40:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:40:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:40:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:40:57,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 17:40:57,165 INFO L175 Difference]: Start difference. First operand has 381 places, 368 transitions, 3800 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:40:57,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 400 transitions, 4749 flow [2024-06-20 17:41:02,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 400 transitions, 4694 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:41:02,068 INFO L231 Difference]: Finished difference. Result has 382 places, 369 transitions, 3826 flow [2024-06-20 17:41:02,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3826, PETRI_PLACES=382, PETRI_TRANSITIONS=369} [2024-06-20 17:41:02,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 17:41:02,068 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 369 transitions, 3826 flow [2024-06-20 17:41:02,068 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) [2024-06-20 17:41:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:41:02,069 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, 1] [2024-06-20 17:41:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:41:02,069 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:41:02,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:41:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -939949490, now seen corresponding path program 7 times [2024-06-20 17:41:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:41:02,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868696941] [2024-06-20 17:41:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:41:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:41:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:41:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:41:05,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:41:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868696941] [2024-06-20 17:41:05,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868696941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:41:05,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:41:05,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:41:05,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855321129] [2024-06-20 17:41:05,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:41:05,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:41:05,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:41:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:41:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:41:05,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:41:05,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 369 transitions, 3826 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) [2024-06-20 17:41:05,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:41:05,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:41:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:41:07,983 INFO L124 PetriNetUnfolderBase]: 4061/6632 cut-off events. [2024-06-20 17:41:07,983 INFO L125 PetriNetUnfolderBase]: For 707792/707792 co-relation queries the response was YES. [2024-06-20 17:41:08,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40253 conditions, 6632 events. 4061/6632 cut-off events. For 707792/707792 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43284 event pairs, 1072 based on Foata normal form. 8/6639 useless extension candidates. Maximal degree in co-relation 40072. Up to 5567 conditions per place. [2024-06-20 17:41:08,061 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 46 changer transitions 0/408 dead transitions. [2024-06-20 17:41:08,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 408 transitions, 4820 flow [2024-06-20 17:41:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:41:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:41:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-20 17:41:08,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-20 17:41:08,063 INFO L175 Difference]: Start difference. First operand has 382 places, 369 transitions, 3826 flow. Second operand 12 states and 187 transitions. [2024-06-20 17:41:08,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 408 transitions, 4820 flow [2024-06-20 17:41:12,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 408 transitions, 4615 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 17:41:12,290 INFO L231 Difference]: Finished difference. Result has 384 places, 369 transitions, 3717 flow [2024-06-20 17:41:12,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3717, PETRI_PLACES=384, PETRI_TRANSITIONS=369} [2024-06-20 17:41:12,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-20 17:41:12,291 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 369 transitions, 3717 flow [2024-06-20 17:41:12,291 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) [2024-06-20 17:41:12,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:41:12,291 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] [2024-06-20 17:41:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:41:12,291 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:41:12,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:41:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1670332180, now seen corresponding path program 28 times [2024-06-20 17:41:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:41:12,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715770461] [2024-06-20 17:41:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:41:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:41:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:41:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:41:15,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:41:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715770461] [2024-06-20 17:41:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715770461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:41:15,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:41:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:41:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782468206] [2024-06-20 17:41:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:41:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:41:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:41:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:41:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:41:15,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:41:15,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 369 transitions, 3717 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) [2024-06-20 17:41:15,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:41:15,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:41:15,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:41:18,168 INFO L124 PetriNetUnfolderBase]: 4275/6931 cut-off events. [2024-06-20 17:41:18,168 INFO L125 PetriNetUnfolderBase]: For 1071837/1071837 co-relation queries the response was YES. [2024-06-20 17:41:18,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46315 conditions, 6931 events. 4275/6931 cut-off events. For 1071837/1071837 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 44815 event pairs, 1093 based on Foata normal form. 8/6932 useless extension candidates. Maximal degree in co-relation 46137. Up to 4990 conditions per place. [2024-06-20 17:41:18,262 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 91 changer transitions 0/405 dead transitions. [2024-06-20 17:41:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 405 transitions, 4987 flow [2024-06-20 17:41:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:41:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:41:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:41:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:41:18,263 INFO L175 Difference]: Start difference. First operand has 384 places, 369 transitions, 3717 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:41:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 405 transitions, 4987 flow Killed by 15