./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe016_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe016_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:18:04,199 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:18:04,273 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:18:04,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:18:04,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:18:04,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:18:04,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:18:04,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:18:04,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:18:04,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:18:04,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:18:04,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:18:04,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:18:04,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:18:04,313 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:18:04,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:18:04,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:18:04,314 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:18:04,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:18:04,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:18:04,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:18:04,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:18:04,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:18:04,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:18:04,315 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:18:04,315 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:18:04,316 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:18:04,316 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:18:04,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:18:04,317 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:18:04,317 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:18:04,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:18:04,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:18:04,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:18:04,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:18:04,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:18:04,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:18:04,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:18:04,319 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:18:04,319 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:18:04,319 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:18:04,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:18:04,319 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:18:04,320 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:18:04,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:18:04,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:18:04,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:18:04,583 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:18:04,583 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:18:04,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-14 13:18:05,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:18:05,858 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:18:05,869 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-14 13:18:05,884 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eb8d302a/ddce4ca47ff8452398c033fe135b783a/FLAG19f48dc71 [2024-06-14 13:18:05,898 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eb8d302a/ddce4ca47ff8452398c033fe135b783a [2024-06-14 13:18:05,899 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:18:05,900 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:18:05,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe016_rmo.oepc.yml/witness.yml [2024-06-14 13:18:06,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:18:06,133 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:18:06,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:18:06,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:18:06,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:18:06,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:18:05" (1/2) ... [2024-06-14 13:18:06,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5519614a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:18:06, skipping insertion in model container [2024-06-14 13:18:06,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:18:05" (1/2) ... [2024-06-14 13:18:06,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2405471d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:18:06, skipping insertion in model container [2024-06-14 13:18:06,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:18:06" (2/2) ... [2024-06-14 13:18:06,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5519614a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06, skipping insertion in model container [2024-06-14 13:18:06,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:18:06" (2/2) ... [2024-06-14 13:18:06,141 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:18:06,282 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:18:06,283 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 13:18:06,283 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 13:18:06,284 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 13:18:06,284 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 13:18:06,284 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:18:06,285 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-14 13:18:06,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:18:06,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:18:06,572 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:18:06,702 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:18:06,731 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:18:06,732 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06 WrapperNode [2024-06-14 13:18:06,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:18:06,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:18:06,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:18:06,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:18:06,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,798 INFO L138 Inliner]: procedures = 176, calls = 118, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 331 [2024-06-14 13:18:06,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:18:06,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:18:06,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:18:06,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:18:06,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,817 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,840 INFO L175 MemorySlicer]: Split 72 memory accesses to 2 slices as follows [2, 70]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-14 13:18:06,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:18:06,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:18:06,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:18:06,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:18:06,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (1/1) ... [2024-06-14 13:18:06,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:18:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:18:06,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:18:06,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:18:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:18:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:18:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:18:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:18:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:18:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:18:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:18:07,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:18:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:18:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:18:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:18:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:18:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:18:07,006 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:18:07,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:18:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:18:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:18:07,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:18:07,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:18:07,009 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:18:07,164 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:18:07,166 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:18:07,660 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:18:07,660 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:18:08,200 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:18:08,201 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:18:08,201 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:18:08 BoogieIcfgContainer [2024-06-14 13:18:08,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:18:08,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:18:08,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:18:08,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:18:08,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:18:05" (1/4) ... [2024-06-14 13:18:08,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca8c078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:18:08, skipping insertion in model container [2024-06-14 13:18:08,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:18:06" (2/4) ... [2024-06-14 13:18:08,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca8c078 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:18:08, skipping insertion in model container [2024-06-14 13:18:08,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:18:06" (3/4) ... [2024-06-14 13:18:08,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca8c078 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:18:08, skipping insertion in model container [2024-06-14 13:18:08,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:18:08" (4/4) ... [2024-06-14 13:18:08,207 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2024-06-14 13:18:08,221 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:18:08,221 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:18:08,221 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:18:08,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:18:08,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:18:08,318 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:18:08,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:18:08,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:18:08,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:18:08,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:18:08,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:18:08,334 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;@42a808f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:18:08,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:18:08,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:18:08,338 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:18:08,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:18:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:08,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:18:08,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:08,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:08,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1294315499, now seen corresponding path program 1 times [2024-06-14 13:18:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103056118] [2024-06-14 13:18:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103056118] [2024-06-14 13:18:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103056118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:18:10,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888551607] [2024-06-14 13:18:10,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:10,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:18:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:18:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:18:10,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:18:10,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:10,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:10,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:18:10,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:12,279 INFO L124 PetriNetUnfolderBase]: 5566/7764 cut-off events. [2024-06-14 13:18:12,279 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-14 13:18:12,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 7764 events. 5566/7764 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40300 event pairs, 4068 based on Foata normal form. 1/7637 useless extension candidates. Maximal degree in co-relation 15696. Up to 7674 conditions per place. [2024-06-14 13:18:12,324 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-14 13:18:12,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 247 flow [2024-06-14 13:18:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:18:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:18:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-14 13:18:12,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-14 13:18:12,336 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 90 transitions. [2024-06-14 13:18:12,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 247 flow [2024-06-14 13:18:12,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:12,344 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:18:12,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:18:12,348 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:18:12,348 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:18:12,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:12,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:12,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:12,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:18:12,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:12,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1703360052, now seen corresponding path program 1 times [2024-06-14 13:18:12,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:12,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969014281] [2024-06-14 13:18:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:12,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969014281] [2024-06-14 13:18:14,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969014281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:14,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:14,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:18:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972027360] [2024-06-14 13:18:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:18:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:18:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:18:14,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:18:14,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:14,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:14,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:18:14,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:16,682 INFO L124 PetriNetUnfolderBase]: 5556/7745 cut-off events. [2024-06-14 13:18:16,682 INFO L125 PetriNetUnfolderBase]: For 1504/1514 co-relation queries the response was YES. [2024-06-14 13:18:16,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 7745 events. 5556/7745 cut-off events. For 1504/1514 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40032 event pairs, 3547 based on Foata normal form. 7/7748 useless extension candidates. Maximal degree in co-relation 17946. Up to 7633 conditions per place. [2024-06-14 13:18:16,718 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-14 13:18:16,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 351 flow [2024-06-14 13:18:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:18:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:18:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-14 13:18:16,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-06-14 13:18:16,720 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 118 transitions. [2024-06-14 13:18:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 351 flow [2024-06-14 13:18:16,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:18:16,738 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 13:18:16,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 13:18:16,740 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 13:18:16,741 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 13:18:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:16,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:16,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:18:16,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:16,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1264555332, now seen corresponding path program 1 times [2024-06-14 13:18:16,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:16,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669270167] [2024-06-14 13:18:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:16,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:19,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:19,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669270167] [2024-06-14 13:18:19,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669270167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:19,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:19,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:18:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451619902] [2024-06-14 13:18:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:18:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:18:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:18:19,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:19,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:19,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:19,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:19,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:21,519 INFO L124 PetriNetUnfolderBase]: 6725/9324 cut-off events. [2024-06-14 13:18:21,519 INFO L125 PetriNetUnfolderBase]: For 4925/4925 co-relation queries the response was YES. [2024-06-14 13:18:21,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24131 conditions, 9324 events. 6725/9324 cut-off events. For 4925/4925 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48195 event pairs, 3191 based on Foata normal form. 7/9325 useless extension candidates. Maximal degree in co-relation 24114. Up to 9079 conditions per place. [2024-06-14 13:18:21,569 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 91 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2024-06-14 13:18:21,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 116 transitions, 619 flow [2024-06-14 13:18:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:18:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:18:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 13:18:21,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5735849056603773 [2024-06-14 13:18:21,573 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 152 transitions. [2024-06-14 13:18:21,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 116 transitions, 619 flow [2024-06-14 13:18:21,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 588 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:18:21,577 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 320 flow [2024-06-14 13:18:21,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2024-06-14 13:18:21,578 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 13:18:21,578 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 320 flow [2024-06-14 13:18:21,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:21,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:18:21,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:21,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -238028989, now seen corresponding path program 1 times [2024-06-14 13:18:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732653140] [2024-06-14 13:18:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:24,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732653140] [2024-06-14 13:18:24,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732653140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:24,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:24,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:18:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574530372] [2024-06-14 13:18:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:18:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:18:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:18:24,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:24,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:24,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:24,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:24,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:27,036 INFO L124 PetriNetUnfolderBase]: 6895/9590 cut-off events. [2024-06-14 13:18:27,036 INFO L125 PetriNetUnfolderBase]: For 11767/11767 co-relation queries the response was YES. [2024-06-14 13:18:27,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29179 conditions, 9590 events. 6895/9590 cut-off events. For 11767/11767 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50069 event pairs, 2460 based on Foata normal form. 32/9616 useless extension candidates. Maximal degree in co-relation 29159. Up to 9063 conditions per place. [2024-06-14 13:18:27,090 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-06-14 13:18:27,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 131 transitions, 768 flow [2024-06-14 13:18:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:18:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:18:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-14 13:18:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-06-14 13:18:27,095 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 320 flow. Second operand 6 states and 177 transitions. [2024-06-14 13:18:27,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 131 transitions, 768 flow [2024-06-14 13:18:27,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 131 transitions, 760 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 13:18:27,106 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 385 flow [2024-06-14 13:18:27,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-14 13:18:27,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-14 13:18:27,107 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 385 flow [2024-06-14 13:18:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:27,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:27,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:18:27,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:27,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1803573070, now seen corresponding path program 1 times [2024-06-14 13:18:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:27,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900342876] [2024-06-14 13:18:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:28,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900342876] [2024-06-14 13:18:28,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900342876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:28,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:28,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:18:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343178603] [2024-06-14 13:18:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:28,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:18:28,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:18:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:18:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2024-06-14 13:18:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:30,470 INFO L124 PetriNetUnfolderBase]: 6886/9585 cut-off events. [2024-06-14 13:18:30,470 INFO L125 PetriNetUnfolderBase]: For 16914/16914 co-relation queries the response was YES. [2024-06-14 13:18:30,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31494 conditions, 9585 events. 6886/9585 cut-off events. For 16914/16914 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50070 event pairs, 3060 based on Foata normal form. 3/9585 useless extension candidates. Maximal degree in co-relation 31471. Up to 9469 conditions per place. [2024-06-14 13:18:30,528 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 79 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-14 13:18:30,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 628 flow [2024-06-14 13:18:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:18:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:18:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:18:30,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-14 13:18:30,533 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 385 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:18:30,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 628 flow [2024-06-14 13:18:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 575 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:30,545 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 381 flow [2024-06-14 13:18:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-14 13:18:30,547 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-14 13:18:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 381 flow [2024-06-14 13:18:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2024-06-14 13:18:30,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:30,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:18:30,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 782520175, now seen corresponding path program 1 times [2024-06-14 13:18:30,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710896167] [2024-06-14 13:18:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:33,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710896167] [2024-06-14 13:18:33,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710896167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:33,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:33,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:18:33,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270727420] [2024-06-14 13:18:33,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:33,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:18:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:18:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:18:33,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:33,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:33,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:33,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:33,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:35,331 INFO L124 PetriNetUnfolderBase]: 6904/9603 cut-off events. [2024-06-14 13:18:35,331 INFO L125 PetriNetUnfolderBase]: For 19735/19735 co-relation queries the response was YES. [2024-06-14 13:18:35,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 9603 events. 6904/9603 cut-off events. For 19735/19735 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49984 event pairs, 3051 based on Foata normal form. 6/9603 useless extension candidates. Maximal degree in co-relation 31980. Up to 9348 conditions per place. [2024-06-14 13:18:35,387 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 86 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-14 13:18:35,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 754 flow [2024-06-14 13:18:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:18:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:18:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:18:35,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 13:18:35,389 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 381 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:18:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 754 flow [2024-06-14 13:18:35,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 732 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:35,399 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 468 flow [2024-06-14 13:18:35,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-14 13:18:35,400 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:18:35,400 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 468 flow [2024-06-14 13:18:35,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:35,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:35,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:35,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:18:35,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:35,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:35,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1933102225, now seen corresponding path program 2 times [2024-06-14 13:18:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:35,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794209063] [2024-06-14 13:18:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:35,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:37,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794209063] [2024-06-14 13:18:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794209063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:37,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:18:37,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519715389] [2024-06-14 13:18:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:37,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:18:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:18:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:18:37,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:39,978 INFO L124 PetriNetUnfolderBase]: 6859/9520 cut-off events. [2024-06-14 13:18:39,978 INFO L125 PetriNetUnfolderBase]: For 23934/23934 co-relation queries the response was YES. [2024-06-14 13:18:39,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32748 conditions, 9520 events. 6859/9520 cut-off events. For 23934/23934 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49312 event pairs, 3071 based on Foata normal form. 3/9511 useless extension candidates. Maximal degree in co-relation 32720. Up to 9279 conditions per place. [2024-06-14 13:18:40,040 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-14 13:18:40,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 760 flow [2024-06-14 13:18:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:18:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:18:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:18:40,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:18:40,042 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 468 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:18:40,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 760 flow [2024-06-14 13:18:40,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 723 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:40,052 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 502 flow [2024-06-14 13:18:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-14 13:18:40,053 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 13:18:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 502 flow [2024-06-14 13:18:40,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:40,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:40,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:18:40,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:40,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 788242031, now seen corresponding path program 1 times [2024-06-14 13:18:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820239538] [2024-06-14 13:18:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:41,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820239538] [2024-06-14 13:18:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820239538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:18:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758123480] [2024-06-14 13:18:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:18:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:18:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:18:41,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:41,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:41,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:41,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:41,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:43,771 INFO L124 PetriNetUnfolderBase]: 6844/9511 cut-off events. [2024-06-14 13:18:43,771 INFO L125 PetriNetUnfolderBase]: For 28023/28023 co-relation queries the response was YES. [2024-06-14 13:18:43,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33429 conditions, 9511 events. 6844/9511 cut-off events. For 28023/28023 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49344 event pairs, 2897 based on Foata normal form. 6/9514 useless extension candidates. Maximal degree in co-relation 33400. Up to 9360 conditions per place. [2024-06-14 13:18:43,837 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 95 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2024-06-14 13:18:43,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 818 flow [2024-06-14 13:18:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:18:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:18:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:18:43,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:18:43,839 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 502 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:18:43,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 818 flow [2024-06-14 13:18:43,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 779 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:43,863 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 527 flow [2024-06-14 13:18:43,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=527, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-14 13:18:43,865 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:18:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 527 flow [2024-06-14 13:18:43,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:43,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:43,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:18:43,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 382654222, now seen corresponding path program 1 times [2024-06-14 13:18:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:43,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14968164] [2024-06-14 13:18:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:43,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14968164] [2024-06-14 13:18:47,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14968164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:47,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932028039] [2024-06-14 13:18:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:47,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:47,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:47,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:47,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:47,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:49,614 INFO L124 PetriNetUnfolderBase]: 7044/9814 cut-off events. [2024-06-14 13:18:49,615 INFO L125 PetriNetUnfolderBase]: For 36821/36821 co-relation queries the response was YES. [2024-06-14 13:18:49,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36156 conditions, 9814 events. 7044/9814 cut-off events. For 36821/36821 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51336 event pairs, 2962 based on Foata normal form. 30/9838 useless extension candidates. Maximal degree in co-relation 36125. Up to 9328 conditions per place. [2024-06-14 13:18:49,671 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-06-14 13:18:49,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 133 transitions, 927 flow [2024-06-14 13:18:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:18:49,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 13:18:49,674 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 527 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:18:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 133 transitions, 927 flow [2024-06-14 13:18:49,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 133 transitions, 889 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:49,693 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 588 flow [2024-06-14 13:18:49,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-06-14 13:18:49,694 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-14 13:18:49,694 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 588 flow [2024-06-14 13:18:49,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:49,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:49,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:49,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:18:49,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:49,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2009558096, now seen corresponding path program 2 times [2024-06-14 13:18:49,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:49,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007075819] [2024-06-14 13:18:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:49,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007075819] [2024-06-14 13:18:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007075819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:52,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36939232] [2024-06-14 13:18:52,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:52,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:52,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:52,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:52,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:52,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:54,776 INFO L124 PetriNetUnfolderBase]: 7088/9883 cut-off events. [2024-06-14 13:18:54,777 INFO L125 PetriNetUnfolderBase]: For 44937/44937 co-relation queries the response was YES. [2024-06-14 13:18:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38482 conditions, 9883 events. 7088/9883 cut-off events. For 44937/44937 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51473 event pairs, 3024 based on Foata normal form. 6/9877 useless extension candidates. Maximal degree in co-relation 38450. Up to 9584 conditions per place. [2024-06-14 13:18:54,836 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 94 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-14 13:18:54,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 966 flow [2024-06-14 13:18:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:18:54,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-14 13:18:54,839 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 588 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:18:54,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 966 flow [2024-06-14 13:18:54,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 899 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:54,866 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 627 flow [2024-06-14 13:18:54,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-14 13:18:54,866 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-14 13:18:54,866 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 627 flow [2024-06-14 13:18:54,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:54,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:54,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:54,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:18:54,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:18:54,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1033474646, now seen corresponding path program 3 times [2024-06-14 13:18:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:54,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715398402] [2024-06-14 13:18:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:54,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:57,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:57,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715398402] [2024-06-14 13:18:57,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715398402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:57,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:57,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456273904] [2024-06-14 13:18:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:57,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:18:57,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 627 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:57,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:57,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:18:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:00,034 INFO L124 PetriNetUnfolderBase]: 7073/9862 cut-off events. [2024-06-14 13:19:00,035 INFO L125 PetriNetUnfolderBase]: For 53912/53912 co-relation queries the response was YES. [2024-06-14 13:19:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39907 conditions, 9862 events. 7073/9862 cut-off events. For 53912/53912 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51392 event pairs, 2662 based on Foata normal form. 6/9856 useless extension candidates. Maximal degree in co-relation 39874. Up to 9247 conditions per place. [2024-06-14 13:19:00,088 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 93 selfloop transitions, 37 changer transitions 0/136 dead transitions. [2024-06-14 13:19:00,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 136 transitions, 1037 flow [2024-06-14 13:19:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:19:00,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-14 13:19:00,090 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 627 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:19:00,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 136 transitions, 1037 flow [2024-06-14 13:19:00,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 957 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:00,137 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 675 flow [2024-06-14 13:19:00,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2024-06-14 13:19:00,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-14 13:19:00,138 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 675 flow [2024-06-14 13:19:00,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:00,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:00,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:19:00,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:00,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1227255630, now seen corresponding path program 1 times [2024-06-14 13:19:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322029396] [2024-06-14 13:19:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322029396] [2024-06-14 13:19:02,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322029396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:02,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:02,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:02,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227943221] [2024-06-14 13:19:02,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:02,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:02,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:02,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:02,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:02,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:04,412 INFO L124 PetriNetUnfolderBase]: 7938/11200 cut-off events. [2024-06-14 13:19:04,413 INFO L125 PetriNetUnfolderBase]: For 70876/70876 co-relation queries the response was YES. [2024-06-14 13:19:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46915 conditions, 11200 events. 7938/11200 cut-off events. For 70876/70876 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 60317 event pairs, 3089 based on Foata normal form. 18/11210 useless extension candidates. Maximal degree in co-relation 46881. Up to 9939 conditions per place. [2024-06-14 13:19:04,493 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 134 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-06-14 13:19:04,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 189 transitions, 1592 flow [2024-06-14 13:19:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 13:19:04,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-14 13:19:04,498 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 675 flow. Second operand 8 states and 209 transitions. [2024-06-14 13:19:04,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 189 transitions, 1592 flow [2024-06-14 13:19:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 189 transitions, 1444 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:04,559 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 957 flow [2024-06-14 13:19:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=957, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-14 13:19:04,560 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-14 13:19:04,560 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 957 flow [2024-06-14 13:19:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:04,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:04,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:04,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:19:04,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:04,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1682485642, now seen corresponding path program 2 times [2024-06-14 13:19:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656962971] [2024-06-14 13:19:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656962971] [2024-06-14 13:19:07,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656962971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:07,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:07,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731833305] [2024-06-14 13:19:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:07,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:07,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 957 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:07,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:07,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:07,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:10,117 INFO L124 PetriNetUnfolderBase]: 8142/11528 cut-off events. [2024-06-14 13:19:10,118 INFO L125 PetriNetUnfolderBase]: For 88471/88473 co-relation queries the response was YES. [2024-06-14 13:19:10,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50484 conditions, 11528 events. 8142/11528 cut-off events. For 88471/88473 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 63077 event pairs, 2351 based on Foata normal form. 18/11538 useless extension candidates. Maximal degree in co-relation 50447. Up to 9394 conditions per place. [2024-06-14 13:19:10,197 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 112 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-14 13:19:10,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 175 transitions, 1589 flow [2024-06-14 13:19:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 13:19:10,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-14 13:19:10,199 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 957 flow. Second operand 7 states and 180 transitions. [2024-06-14 13:19:10,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 175 transitions, 1589 flow [2024-06-14 13:19:10,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1555 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:10,273 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1125 flow [2024-06-14 13:19:10,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1125, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-14 13:19:10,274 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-14 13:19:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1125 flow [2024-06-14 13:19:10,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:10,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:10,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:19:10,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:10,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1800818222, now seen corresponding path program 1 times [2024-06-14 13:19:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159643359] [2024-06-14 13:19:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:15,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159643359] [2024-06-14 13:19:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159643359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:15,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995638853] [2024-06-14 13:19:15,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:15,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:15,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:15,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:15,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:15,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:17,530 INFO L124 PetriNetUnfolderBase]: 8920/12752 cut-off events. [2024-06-14 13:19:17,530 INFO L125 PetriNetUnfolderBase]: For 110309/110317 co-relation queries the response was YES. [2024-06-14 13:19:17,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57645 conditions, 12752 events. 8920/12752 cut-off events. For 110309/110317 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 71877 event pairs, 3238 based on Foata normal form. 33/12766 useless extension candidates. Maximal degree in co-relation 57606. Up to 10717 conditions per place. [2024-06-14 13:19:17,633 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 128 selfloop transitions, 70 changer transitions 0/204 dead transitions. [2024-06-14 13:19:17,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 204 transitions, 2066 flow [2024-06-14 13:19:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:19:17,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:19:17,635 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1125 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:19:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 204 transitions, 2066 flow [2024-06-14 13:19:17,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 204 transitions, 1951 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:17,846 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1582 flow [2024-06-14 13:19:17,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-06-14 13:19:17,847 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-14 13:19:17,847 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1582 flow [2024-06-14 13:19:17,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:17,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:17,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:19:17,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:17,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1614675730, now seen corresponding path program 2 times [2024-06-14 13:19:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67383839] [2024-06-14 13:19:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67383839] [2024-06-14 13:19:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67383839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:19,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601145696] [2024-06-14 13:19:19,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:19,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:19,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:19,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1582 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:19,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:19,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:19,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:22,244 INFO L124 PetriNetUnfolderBase]: 8881/12694 cut-off events. [2024-06-14 13:19:22,245 INFO L125 PetriNetUnfolderBase]: For 105840/105842 co-relation queries the response was YES. [2024-06-14 13:19:22,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57982 conditions, 12694 events. 8881/12694 cut-off events. For 105840/105842 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 72152 event pairs, 2909 based on Foata normal form. 20/12706 useless extension candidates. Maximal degree in co-relation 57939. Up to 10718 conditions per place. [2024-06-14 13:19:22,353 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 138 selfloop transitions, 71 changer transitions 0/215 dead transitions. [2024-06-14 13:19:22,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 215 transitions, 2234 flow [2024-06-14 13:19:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:19:22,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-14 13:19:22,356 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1582 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:19:22,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 215 transitions, 2234 flow [2024-06-14 13:19:22,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 215 transitions, 2078 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:22,560 INFO L231 Difference]: Finished difference. Result has 110 places, 150 transitions, 1627 flow [2024-06-14 13:19:22,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1627, PETRI_PLACES=110, PETRI_TRANSITIONS=150} [2024-06-14 13:19:22,561 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-14 13:19:22,561 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 150 transitions, 1627 flow [2024-06-14 13:19:22,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:22,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:22,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:19:22,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:22,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1930582320, now seen corresponding path program 3 times [2024-06-14 13:19:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:22,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989859800] [2024-06-14 13:19:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989859800] [2024-06-14 13:19:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989859800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:25,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691180372] [2024-06-14 13:19:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:25,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:25,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:25,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 1627 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:25,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:25,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:25,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:27,798 INFO L124 PetriNetUnfolderBase]: 8842/12626 cut-off events. [2024-06-14 13:19:27,798 INFO L125 PetriNetUnfolderBase]: For 111916/111936 co-relation queries the response was YES. [2024-06-14 13:19:27,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58140 conditions, 12626 events. 8842/12626 cut-off events. For 111916/111936 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 71144 event pairs, 2036 based on Foata normal form. 21/12602 useless extension candidates. Maximal degree in co-relation 58094. Up to 9431 conditions per place. [2024-06-14 13:19:27,893 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 104 selfloop transitions, 84 changer transitions 0/194 dead transitions. [2024-06-14 13:19:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 194 transitions, 2131 flow [2024-06-14 13:19:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:19:27,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:19:27,895 INFO L175 Difference]: Start difference. First operand has 110 places, 150 transitions, 1627 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:19:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 194 transitions, 2131 flow [2024-06-14 13:19:28,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 194 transitions, 2010 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:28,038 INFO L231 Difference]: Finished difference. Result has 111 places, 151 transitions, 1691 flow [2024-06-14 13:19:28,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=111, PETRI_TRANSITIONS=151} [2024-06-14 13:19:28,054 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 13:19:28,054 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 151 transitions, 1691 flow [2024-06-14 13:19:28,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-14 13:19:28,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:28,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:28,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:19:28,055 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:28,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1506491888, now seen corresponding path program 1 times [2024-06-14 13:19:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516345608] [2024-06-14 13:19:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516345608] [2024-06-14 13:19:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516345608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002341416] [2024-06-14 13:19:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:30,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:30,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 151 transitions, 1691 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:30,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:30,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:30,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:32,465 INFO L124 PetriNetUnfolderBase]: 8868/12772 cut-off events. [2024-06-14 13:19:32,465 INFO L125 PetriNetUnfolderBase]: For 134816/134821 co-relation queries the response was YES. [2024-06-14 13:19:32,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59947 conditions, 12772 events. 8868/12772 cut-off events. For 134816/134821 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74053 event pairs, 4524 based on Foata normal form. 10/12772 useless extension candidates. Maximal degree in co-relation 59900. Up to 12318 conditions per place. [2024-06-14 13:19:32,543 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 160 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-06-14 13:19:32,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 184 transitions, 2225 flow [2024-06-14 13:19:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:19:32,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2024-06-14 13:19:32,560 INFO L175 Difference]: Start difference. First operand has 111 places, 151 transitions, 1691 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:19:32,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 184 transitions, 2225 flow [2024-06-14 13:19:32,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 184 transitions, 2032 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:32,684 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1642 flow [2024-06-14 13:19:32,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1642, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2024-06-14 13:19:32,684 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-14 13:19:32,684 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1642 flow [2024-06-14 13:19:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:32,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:32,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:19:32,685 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:32,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash 595932232, now seen corresponding path program 1 times [2024-06-14 13:19:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502840743] [2024-06-14 13:19:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:34,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502840743] [2024-06-14 13:19:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502840743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:34,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508765447] [2024-06-14 13:19:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:34,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:34,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:34,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:34,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1642 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:34,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:34,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:36,924 INFO L124 PetriNetUnfolderBase]: 8887/12803 cut-off events. [2024-06-14 13:19:36,925 INFO L125 PetriNetUnfolderBase]: For 141277/141285 co-relation queries the response was YES. [2024-06-14 13:19:36,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61792 conditions, 12803 events. 8887/12803 cut-off events. For 141277/141285 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74332 event pairs, 4497 based on Foata normal form. 6/12799 useless extension candidates. Maximal degree in co-relation 61743. Up to 12392 conditions per place. [2024-06-14 13:19:37,036 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 169 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-14 13:19:37,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 197 transitions, 2258 flow [2024-06-14 13:19:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:19:37,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-14 13:19:37,039 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1642 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:19:37,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 197 transitions, 2258 flow [2024-06-14 13:19:37,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 197 transitions, 2222 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 13:19:37,203 INFO L231 Difference]: Finished difference. Result has 117 places, 169 transitions, 1759 flow [2024-06-14 13:19:37,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1759, PETRI_PLACES=117, PETRI_TRANSITIONS=169} [2024-06-14 13:19:37,204 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-14 13:19:37,204 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 169 transitions, 1759 flow [2024-06-14 13:19:37,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:37,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:37,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:19:37,205 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:37,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash 601472242, now seen corresponding path program 2 times [2024-06-14 13:19:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:37,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131864125] [2024-06-14 13:19:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:39,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131864125] [2024-06-14 13:19:39,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131864125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:39,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:39,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:39,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427047153] [2024-06-14 13:19:39,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:39,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:39,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:39,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 169 transitions, 1759 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:39,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:39,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:39,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:41,395 INFO L124 PetriNetUnfolderBase]: 8880/12794 cut-off events. [2024-06-14 13:19:41,396 INFO L125 PetriNetUnfolderBase]: For 158242/158250 co-relation queries the response was YES. [2024-06-14 13:19:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64101 conditions, 12794 events. 8880/12794 cut-off events. For 158242/158250 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74264 event pairs, 4497 based on Foata normal form. 6/12790 useless extension candidates. Maximal degree in co-relation 64049. Up to 12396 conditions per place. [2024-06-14 13:19:41,528 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 166 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2024-06-14 13:19:41,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 190 transitions, 2187 flow [2024-06-14 13:19:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:19:41,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-14 13:19:41,531 INFO L175 Difference]: Start difference. First operand has 117 places, 169 transitions, 1759 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:19:41,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 190 transitions, 2187 flow [2024-06-14 13:19:41,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 190 transitions, 2108 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:41,749 INFO L231 Difference]: Finished difference. Result has 120 places, 169 transitions, 1730 flow [2024-06-14 13:19:41,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1730, PETRI_PLACES=120, PETRI_TRANSITIONS=169} [2024-06-14 13:19:41,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-14 13:19:41,749 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 169 transitions, 1730 flow [2024-06-14 13:19:41,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:41,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:41,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:41,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:19:41,750 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:41,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1779567922, now seen corresponding path program 1 times [2024-06-14 13:19:41,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:41,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162499723] [2024-06-14 13:19:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:41,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:43,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:43,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162499723] [2024-06-14 13:19:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162499723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:43,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797740457] [2024-06-14 13:19:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:43,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 169 transitions, 1730 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:46,394 INFO L124 PetriNetUnfolderBase]: 9076/12990 cut-off events. [2024-06-14 13:19:46,394 INFO L125 PetriNetUnfolderBase]: For 165754/165793 co-relation queries the response was YES. [2024-06-14 13:19:46,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66368 conditions, 12990 events. 9076/12990 cut-off events. For 165754/165793 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 74208 event pairs, 3434 based on Foata normal form. 40/13019 useless extension candidates. Maximal degree in co-relation 66314. Up to 12050 conditions per place. [2024-06-14 13:19:46,489 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 166 selfloop transitions, 86 changer transitions 0/258 dead transitions. [2024-06-14 13:19:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 258 transitions, 2954 flow [2024-06-14 13:19:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 13:19:46,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 13:19:46,491 INFO L175 Difference]: Start difference. First operand has 120 places, 169 transitions, 1730 flow. Second operand 8 states and 207 transitions. [2024-06-14 13:19:46,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 258 transitions, 2954 flow [2024-06-14 13:19:46,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 258 transitions, 2899 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:46,671 INFO L231 Difference]: Finished difference. Result has 126 places, 203 transitions, 2367 flow [2024-06-14 13:19:46,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=126, PETRI_TRANSITIONS=203} [2024-06-14 13:19:46,672 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-14 13:19:46,672 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 203 transitions, 2367 flow [2024-06-14 13:19:46,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:46,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:46,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:46,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:19:46,672 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:46,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash -593279226, now seen corresponding path program 2 times [2024-06-14 13:19:46,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651646134] [2024-06-14 13:19:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651646134] [2024-06-14 13:19:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651646134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:48,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592667605] [2024-06-14 13:19:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:48,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:48,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 203 transitions, 2367 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:48,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:48,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:51,881 INFO L124 PetriNetUnfolderBase]: 9384/13420 cut-off events. [2024-06-14 13:19:51,881 INFO L125 PetriNetUnfolderBase]: For 187610/187664 co-relation queries the response was YES. [2024-06-14 13:19:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73920 conditions, 13420 events. 9384/13420 cut-off events. For 187610/187664 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 76625 event pairs, 3174 based on Foata normal form. 49/13458 useless extension candidates. Maximal degree in co-relation 73863. Up to 12299 conditions per place. [2024-06-14 13:19:51,996 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 177 selfloop transitions, 124 changer transitions 0/307 dead transitions. [2024-06-14 13:19:51,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 307 transitions, 4046 flow [2024-06-14 13:19:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 13:19:51,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 13:19:51,999 INFO L175 Difference]: Start difference. First operand has 126 places, 203 transitions, 2367 flow. Second operand 8 states and 207 transitions. [2024-06-14 13:19:51,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 307 transitions, 4046 flow [2024-06-14 13:19:52,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 307 transitions, 3852 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:52,311 INFO L231 Difference]: Finished difference. Result has 135 places, 250 transitions, 3268 flow [2024-06-14 13:19:52,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3268, PETRI_PLACES=135, PETRI_TRANSITIONS=250} [2024-06-14 13:19:52,312 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-14 13:19:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 250 transitions, 3268 flow [2024-06-14 13:19:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:52,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:52,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:19:52,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:52,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -556078885, now seen corresponding path program 1 times [2024-06-14 13:19:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643421887] [2024-06-14 13:19:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:54,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643421887] [2024-06-14 13:19:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643421887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618809917] [2024-06-14 13:19:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:54,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:19:54,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 250 transitions, 3268 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:54,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:54,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:19:54,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:57,748 INFO L124 PetriNetUnfolderBase]: 9803/14020 cut-off events. [2024-06-14 13:19:57,748 INFO L125 PetriNetUnfolderBase]: For 216851/216875 co-relation queries the response was YES. [2024-06-14 13:19:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79247 conditions, 14020 events. 9803/14020 cut-off events. For 216851/216875 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 80685 event pairs, 4113 based on Foata normal form. 30/14041 useless extension candidates. Maximal degree in co-relation 79185. Up to 13313 conditions per place. [2024-06-14 13:19:57,886 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 286 selfloop transitions, 47 changer transitions 0/339 dead transitions. [2024-06-14 13:19:57,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 339 transitions, 4639 flow [2024-06-14 13:19:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:19:57,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-14 13:19:57,888 INFO L175 Difference]: Start difference. First operand has 135 places, 250 transitions, 3268 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:19:57,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 339 transitions, 4639 flow [2024-06-14 13:19:58,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 339 transitions, 4448 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:58,253 INFO L231 Difference]: Finished difference. Result has 143 places, 278 transitions, 3530 flow [2024-06-14 13:19:58,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3530, PETRI_PLACES=143, PETRI_TRANSITIONS=278} [2024-06-14 13:19:58,254 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-14 13:19:58,254 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 278 transitions, 3530 flow [2024-06-14 13:19:58,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:58,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:58,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:58,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:19:58,254 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:19:58,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash 248978028, now seen corresponding path program 3 times [2024-06-14 13:19:58,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:58,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980732618] [2024-06-14 13:19:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:58,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980732618] [2024-06-14 13:20:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980732618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:00,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319321359] [2024-06-14 13:20:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:00,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:00,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 278 transitions, 3530 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:00,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:00,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:00,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:03,845 INFO L124 PetriNetUnfolderBase]: 9898/14168 cut-off events. [2024-06-14 13:20:03,845 INFO L125 PetriNetUnfolderBase]: For 243692/243716 co-relation queries the response was YES. [2024-06-14 13:20:03,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83696 conditions, 14168 events. 9898/14168 cut-off events. For 243692/243716 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 81666 event pairs, 4131 based on Foata normal form. 28/14187 useless extension candidates. Maximal degree in co-relation 83630. Up to 13614 conditions per place. [2024-06-14 13:20:03,973 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 287 selfloop transitions, 50 changer transitions 0/343 dead transitions. [2024-06-14 13:20:03,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 343 transitions, 4679 flow [2024-06-14 13:20:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:20:03,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-14 13:20:03,975 INFO L175 Difference]: Start difference. First operand has 143 places, 278 transitions, 3530 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:20:03,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 343 transitions, 4679 flow [2024-06-14 13:20:04,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 343 transitions, 4578 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:04,331 INFO L231 Difference]: Finished difference. Result has 151 places, 293 transitions, 3804 flow [2024-06-14 13:20:04,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3804, PETRI_PLACES=151, PETRI_TRANSITIONS=293} [2024-06-14 13:20:04,331 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-14 13:20:04,331 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 293 transitions, 3804 flow [2024-06-14 13:20:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:04,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:04,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:20:04,332 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:04,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1564536684, now seen corresponding path program 4 times [2024-06-14 13:20:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471304216] [2024-06-14 13:20:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471304216] [2024-06-14 13:20:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471304216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:07,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49739899] [2024-06-14 13:20:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:07,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:07,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 293 transitions, 3804 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:07,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:07,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:07,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:11,055 INFO L124 PetriNetUnfolderBase]: 9962/14198 cut-off events. [2024-06-14 13:20:11,056 INFO L125 PetriNetUnfolderBase]: For 253291/253348 co-relation queries the response was YES. [2024-06-14 13:20:11,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84972 conditions, 14198 events. 9962/14198 cut-off events. For 253291/253348 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 81075 event pairs, 3480 based on Foata normal form. 53/14240 useless extension candidates. Maximal degree in co-relation 84903. Up to 12977 conditions per place. [2024-06-14 13:20:11,205 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 188 selfloop transitions, 156 changer transitions 0/350 dead transitions. [2024-06-14 13:20:11,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 350 transitions, 4984 flow [2024-06-14 13:20:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 13:20:11,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-14 13:20:11,232 INFO L175 Difference]: Start difference. First operand has 151 places, 293 transitions, 3804 flow. Second operand 7 states and 179 transitions. [2024-06-14 13:20:11,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 350 transitions, 4984 flow [2024-06-14 13:20:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 350 transitions, 4824 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:11,617 INFO L231 Difference]: Finished difference. Result has 154 places, 303 transitions, 4145 flow [2024-06-14 13:20:11,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4145, PETRI_PLACES=154, PETRI_TRANSITIONS=303} [2024-06-14 13:20:11,618 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-14 13:20:11,619 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 303 transitions, 4145 flow [2024-06-14 13:20:11,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:11,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:11,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:11,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:20:11,619 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:11,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1564805454, now seen corresponding path program 5 times [2024-06-14 13:20:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:11,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775925386] [2024-06-14 13:20:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:11,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:15,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775925386] [2024-06-14 13:20:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775925386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:15,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:15,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298741773] [2024-06-14 13:20:15,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:15,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 303 transitions, 4145 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:15,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:15,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:15,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:18,298 INFO L124 PetriNetUnfolderBase]: 10178/14589 cut-off events. [2024-06-14 13:20:18,298 INFO L125 PetriNetUnfolderBase]: For 285555/285579 co-relation queries the response was YES. [2024-06-14 13:20:18,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89144 conditions, 14589 events. 10178/14589 cut-off events. For 285555/285579 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84535 event pairs, 4141 based on Foata normal form. 30/14610 useless extension candidates. Maximal degree in co-relation 89074. Up to 13882 conditions per place. [2024-06-14 13:20:18,432 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 294 selfloop transitions, 80 changer transitions 0/380 dead transitions. [2024-06-14 13:20:18,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 380 transitions, 5715 flow [2024-06-14 13:20:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:20:18,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 13:20:18,435 INFO L175 Difference]: Start difference. First operand has 154 places, 303 transitions, 4145 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:20:18,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 380 transitions, 5715 flow [2024-06-14 13:20:19,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 380 transitions, 5364 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:19,080 INFO L231 Difference]: Finished difference. Result has 158 places, 336 transitions, 4618 flow [2024-06-14 13:20:19,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4618, PETRI_PLACES=158, PETRI_TRANSITIONS=336} [2024-06-14 13:20:19,081 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-14 13:20:19,082 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 336 transitions, 4618 flow [2024-06-14 13:20:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:19,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:19,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:19,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:20:19,082 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:19,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1564805795, now seen corresponding path program 2 times [2024-06-14 13:20:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:19,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810717978] [2024-06-14 13:20:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:22,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810717978] [2024-06-14 13:20:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810717978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:22,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:22,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:22,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589577756] [2024-06-14 13:20:22,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:22,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:22,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:22,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:22,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:22,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 336 transitions, 4618 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:22,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:22,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:22,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:25,761 INFO L124 PetriNetUnfolderBase]: 10454/14945 cut-off events. [2024-06-14 13:20:25,762 INFO L125 PetriNetUnfolderBase]: For 275246/275270 co-relation queries the response was YES. [2024-06-14 13:20:25,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 14945 events. 10454/14945 cut-off events. For 275246/275270 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 86152 event pairs, 4128 based on Foata normal form. 36/14972 useless extension candidates. Maximal degree in co-relation 90339. Up to 14007 conditions per place. [2024-06-14 13:20:25,932 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 323 selfloop transitions, 78 changer transitions 0/407 dead transitions. [2024-06-14 13:20:25,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 407 transitions, 5992 flow [2024-06-14 13:20:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:20:25,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381551362683438 [2024-06-14 13:20:25,935 INFO L175 Difference]: Start difference. First operand has 158 places, 336 transitions, 4618 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:20:25,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 407 transitions, 5992 flow [2024-06-14 13:20:26,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 407 transitions, 5766 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:26,385 INFO L231 Difference]: Finished difference. Result has 166 places, 355 transitions, 4839 flow [2024-06-14 13:20:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4839, PETRI_PLACES=166, PETRI_TRANSITIONS=355} [2024-06-14 13:20:26,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-14 13:20:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 355 transitions, 4839 flow [2024-06-14 13:20:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:26,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:20:26,387 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1465588559, now seen corresponding path program 3 times [2024-06-14 13:20:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659235663] [2024-06-14 13:20:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:29,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:29,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659235663] [2024-06-14 13:20:29,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659235663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:29,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:29,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:29,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073015367] [2024-06-14 13:20:29,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:29,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:29,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:29,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:29,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:29,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 355 transitions, 4839 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:29,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:29,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:29,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:32,561 INFO L124 PetriNetUnfolderBase]: 10512/15026 cut-off events. [2024-06-14 13:20:32,561 INFO L125 PetriNetUnfolderBase]: For 298121/298169 co-relation queries the response was YES. [2024-06-14 13:20:32,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92879 conditions, 15026 events. 10512/15026 cut-off events. For 298121/298169 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 86673 event pairs, 4108 based on Foata normal form. 57/15074 useless extension candidates. Maximal degree in co-relation 92805. Up to 14064 conditions per place. [2024-06-14 13:20:32,702 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 311 selfloop transitions, 83 changer transitions 0/400 dead transitions. [2024-06-14 13:20:32,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 400 transitions, 5939 flow [2024-06-14 13:20:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:20:32,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-14 13:20:32,704 INFO L175 Difference]: Start difference. First operand has 166 places, 355 transitions, 4839 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:20:32,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 400 transitions, 5939 flow [2024-06-14 13:20:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 400 transitions, 5728 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:33,257 INFO L231 Difference]: Finished difference. Result has 169 places, 365 transitions, 5021 flow [2024-06-14 13:20:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5021, PETRI_PLACES=169, PETRI_TRANSITIONS=365} [2024-06-14 13:20:33,258 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2024-06-14 13:20:33,258 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 365 transitions, 5021 flow [2024-06-14 13:20:33,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:33,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:33,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:20:33,259 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:33,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1491506388, now seen corresponding path program 6 times [2024-06-14 13:20:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442056464] [2024-06-14 13:20:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442056464] [2024-06-14 13:20:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442056464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:36,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:36,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110250463] [2024-06-14 13:20:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:36,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:36,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 365 transitions, 5021 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:36,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:36,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:36,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,776 INFO L124 PetriNetUnfolderBase]: 10636/15173 cut-off events. [2024-06-14 13:20:39,777 INFO L125 PetriNetUnfolderBase]: For 294325/294376 co-relation queries the response was YES. [2024-06-14 13:20:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94485 conditions, 15173 events. 10636/15173 cut-off events. For 294325/294376 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 87142 event pairs, 3633 based on Foata normal form. 54/15223 useless extension candidates. Maximal degree in co-relation 94409. Up to 14007 conditions per place. [2024-06-14 13:20:39,911 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 276 selfloop transitions, 164 changer transitions 0/446 dead transitions. [2024-06-14 13:20:39,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 446 transitions, 6615 flow [2024-06-14 13:20:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:20:39,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 13:20:39,913 INFO L175 Difference]: Start difference. First operand has 169 places, 365 transitions, 5021 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:20:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 446 transitions, 6615 flow [2024-06-14 13:20:40,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 446 transitions, 6430 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:40,529 INFO L231 Difference]: Finished difference. Result has 174 places, 387 transitions, 5766 flow [2024-06-14 13:20:40,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5766, PETRI_PLACES=174, PETRI_TRANSITIONS=387} [2024-06-14 13:20:40,533 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-14 13:20:40,533 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 387 transitions, 5766 flow [2024-06-14 13:20:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:40,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:40,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:20:40,534 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:40,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:40,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1465974509, now seen corresponding path program 4 times [2024-06-14 13:20:40,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:40,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840722403] [2024-06-14 13:20:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:40,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840722403] [2024-06-14 13:20:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840722403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453351901] [2024-06-14 13:20:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:43,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:43,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 387 transitions, 5766 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:43,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:43,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:46,885 INFO L124 PetriNetUnfolderBase]: 10706/15307 cut-off events. [2024-06-14 13:20:46,885 INFO L125 PetriNetUnfolderBase]: For 306147/306294 co-relation queries the response was YES. [2024-06-14 13:20:46,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95566 conditions, 15307 events. 10706/15307 cut-off events. For 306147/306294 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 88471 event pairs, 4042 based on Foata normal form. 103/15388 useless extension candidates. Maximal degree in co-relation 95488. Up to 14075 conditions per place. [2024-06-14 13:20:47,030 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 333 selfloop transitions, 93 changer transitions 0/432 dead transitions. [2024-06-14 13:20:47,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 432 transitions, 6998 flow [2024-06-14 13:20:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:20:47,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:20:47,033 INFO L175 Difference]: Start difference. First operand has 174 places, 387 transitions, 5766 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:20:47,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 432 transitions, 6998 flow [2024-06-14 13:20:47,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 432 transitions, 6682 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:47,736 INFO L231 Difference]: Finished difference. Result has 176 places, 401 transitions, 5894 flow [2024-06-14 13:20:47,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5894, PETRI_PLACES=176, PETRI_TRANSITIONS=401} [2024-06-14 13:20:47,737 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-06-14 13:20:47,737 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 401 transitions, 5894 flow [2024-06-14 13:20:47,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:47,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:47,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:20:47,738 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:47,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash 186989809, now seen corresponding path program 1 times [2024-06-14 13:20:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898136915] [2024-06-14 13:20:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898136915] [2024-06-14 13:20:50,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898136915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:50,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:50,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586640620] [2024-06-14 13:20:50,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:50,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:50,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:50,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 401 transitions, 5894 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:50,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:50,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:50,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:53,810 INFO L124 PetriNetUnfolderBase]: 10850/15496 cut-off events. [2024-06-14 13:20:53,811 INFO L125 PetriNetUnfolderBase]: For 325543/325543 co-relation queries the response was YES. [2024-06-14 13:20:53,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99133 conditions, 15496 events. 10850/15496 cut-off events. For 325543/325543 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 89719 event pairs, 4587 based on Foata normal form. 8/15492 useless extension candidates. Maximal degree in co-relation 99053. Up to 14652 conditions per place. [2024-06-14 13:20:53,995 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 418 selfloop transitions, 38 changer transitions 0/462 dead transitions. [2024-06-14 13:20:53,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 462 transitions, 7374 flow [2024-06-14 13:20:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:20:53,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 13:20:53,997 INFO L175 Difference]: Start difference. First operand has 176 places, 401 transitions, 5894 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:20:53,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 462 transitions, 7374 flow [2024-06-14 13:20:54,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 462 transitions, 7268 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-14 13:20:54,668 INFO L231 Difference]: Finished difference. Result has 184 places, 416 transitions, 6100 flow [2024-06-14 13:20:54,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6100, PETRI_PLACES=184, PETRI_TRANSITIONS=416} [2024-06-14 13:20:54,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-14 13:20:54,668 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 416 transitions, 6100 flow [2024-06-14 13:20:54,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:54,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:54,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:20:54,669 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:20:54,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1465980461, now seen corresponding path program 2 times [2024-06-14 13:20:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189725975] [2024-06-14 13:20:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189725975] [2024-06-14 13:20:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189725975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:57,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:57,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29326609] [2024-06-14 13:20:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:57,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:57,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:20:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 416 transitions, 6100 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:20:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:01,074 INFO L124 PetriNetUnfolderBase]: 10972/15659 cut-off events. [2024-06-14 13:21:01,074 INFO L125 PetriNetUnfolderBase]: For 344426/344432 co-relation queries the response was YES. [2024-06-14 13:21:01,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101178 conditions, 15659 events. 10972/15659 cut-off events. For 344426/344432 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90605 event pairs, 4578 based on Foata normal form. 12/15661 useless extension candidates. Maximal degree in co-relation 101093. Up to 14848 conditions per place. [2024-06-14 13:21:01,233 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 432 selfloop transitions, 40 changer transitions 0/478 dead transitions. [2024-06-14 13:21:01,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 478 transitions, 7586 flow [2024-06-14 13:21:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:21:01,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:21:01,235 INFO L175 Difference]: Start difference. First operand has 184 places, 416 transitions, 6100 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:21:01,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 478 transitions, 7586 flow [2024-06-14 13:21:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 478 transitions, 7464 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-14 13:21:01,808 INFO L231 Difference]: Finished difference. Result has 191 places, 427 transitions, 6259 flow [2024-06-14 13:21:01,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5998, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6259, PETRI_PLACES=191, PETRI_TRANSITIONS=427} [2024-06-14 13:21:01,809 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 135 predicate places. [2024-06-14 13:21:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 427 transitions, 6259 flow [2024-06-14 13:21:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:01,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:01,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:21:01,810 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:01,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1497053621, now seen corresponding path program 3 times [2024-06-14 13:21:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:01,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40260375] [2024-06-14 13:21:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:04,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:04,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40260375] [2024-06-14 13:21:04,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40260375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:04,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:04,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434591989] [2024-06-14 13:21:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:04,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:04,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:04,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:04,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 427 transitions, 6259 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:04,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:04,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:04,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:08,672 INFO L124 PetriNetUnfolderBase]: 10954/15644 cut-off events. [2024-06-14 13:21:08,673 INFO L125 PetriNetUnfolderBase]: For 363286/363286 co-relation queries the response was YES. [2024-06-14 13:21:08,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101916 conditions, 15644 events. 10954/15644 cut-off events. For 363286/363286 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 90626 event pairs, 4602 based on Foata normal form. 8/15640 useless extension candidates. Maximal degree in co-relation 101828. Up to 14838 conditions per place. [2024-06-14 13:21:08,821 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 420 selfloop transitions, 36 changer transitions 0/462 dead transitions. [2024-06-14 13:21:08,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 462 transitions, 7403 flow [2024-06-14 13:21:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:21:08,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 13:21:08,828 INFO L175 Difference]: Start difference. First operand has 191 places, 427 transitions, 6259 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:21:08,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 462 transitions, 7403 flow [2024-06-14 13:21:09,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 462 transitions, 7263 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:09,401 INFO L231 Difference]: Finished difference. Result has 193 places, 427 transitions, 6202 flow [2024-06-14 13:21:09,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6202, PETRI_PLACES=193, PETRI_TRANSITIONS=427} [2024-06-14 13:21:09,402 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-14 13:21:09,402 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 427 transitions, 6202 flow [2024-06-14 13:21:09,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:09,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:09,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:09,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:21:09,403 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:09,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1465988397, now seen corresponding path program 1 times [2024-06-14 13:21:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120728102] [2024-06-14 13:21:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:12,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120728102] [2024-06-14 13:21:12,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120728102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:12,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:12,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669095638] [2024-06-14 13:21:12,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:12,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:12,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 427 transitions, 6202 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:12,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:12,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:12,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:16,233 INFO L124 PetriNetUnfolderBase]: 11038/15753 cut-off events. [2024-06-14 13:21:16,233 INFO L125 PetriNetUnfolderBase]: For 381918/381921 co-relation queries the response was YES. [2024-06-14 13:21:16,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103099 conditions, 15753 events. 11038/15753 cut-off events. For 381918/381921 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 90947 event pairs, 4573 based on Foata normal form. 18/15761 useless extension candidates. Maximal degree in co-relation 103009. Up to 15060 conditions per place. [2024-06-14 13:21:16,422 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 437 selfloop transitions, 21 changer transitions 0/464 dead transitions. [2024-06-14 13:21:16,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 464 transitions, 7372 flow [2024-06-14 13:21:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:21:16,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-14 13:21:16,424 INFO L175 Difference]: Start difference. First operand has 193 places, 427 transitions, 6202 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:21:16,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 464 transitions, 7372 flow [2024-06-14 13:21:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 464 transitions, 7300 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:17,117 INFO L231 Difference]: Finished difference. Result has 194 places, 430 transitions, 6251 flow [2024-06-14 13:21:17,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6251, PETRI_PLACES=194, PETRI_TRANSITIONS=430} [2024-06-14 13:21:17,117 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-06-14 13:21:17,118 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 430 transitions, 6251 flow [2024-06-14 13:21:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:17,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:17,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:21:17,118 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:17,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 667972019, now seen corresponding path program 1 times [2024-06-14 13:21:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773677750] [2024-06-14 13:21:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:17,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773677750] [2024-06-14 13:21:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773677750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:19,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504304673] [2024-06-14 13:21:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:19,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:19,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:19,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:19,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 430 transitions, 6251 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:19,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:19,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:19,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:24,213 INFO L124 PetriNetUnfolderBase]: 12130/17150 cut-off events. [2024-06-14 13:21:24,213 INFO L125 PetriNetUnfolderBase]: For 424846/424894 co-relation queries the response was YES. [2024-06-14 13:21:24,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114447 conditions, 17150 events. 12130/17150 cut-off events. For 424846/424894 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98398 event pairs, 3754 based on Foata normal form. 60/17199 useless extension candidates. Maximal degree in co-relation 114356. Up to 13670 conditions per place. [2024-06-14 13:21:24,407 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 334 selfloop transitions, 198 changer transitions 0/538 dead transitions. [2024-06-14 13:21:24,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 538 transitions, 8393 flow [2024-06-14 13:21:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-14 13:21:24,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178197064989518 [2024-06-14 13:21:24,409 INFO L175 Difference]: Start difference. First operand has 194 places, 430 transitions, 6251 flow. Second operand 9 states and 247 transitions. [2024-06-14 13:21:24,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 538 transitions, 8393 flow [2024-06-14 13:21:25,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 538 transitions, 8306 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:25,301 INFO L231 Difference]: Finished difference. Result has 203 places, 459 transitions, 7170 flow [2024-06-14 13:21:25,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7170, PETRI_PLACES=203, PETRI_TRANSITIONS=459} [2024-06-14 13:21:25,301 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-14 13:21:25,302 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 459 transitions, 7170 flow [2024-06-14 13:21:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:25,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:21:25,302 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:25,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1211784069, now seen corresponding path program 2 times [2024-06-14 13:21:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486606673] [2024-06-14 13:21:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:28,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:28,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486606673] [2024-06-14 13:21:28,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486606673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:28,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:28,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865980488] [2024-06-14 13:21:28,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:28,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:28,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 459 transitions, 7170 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:28,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:28,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:28,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:34,211 INFO L124 PetriNetUnfolderBase]: 13774/19281 cut-off events. [2024-06-14 13:21:34,212 INFO L125 PetriNetUnfolderBase]: For 544012/544083 co-relation queries the response was YES. [2024-06-14 13:21:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140027 conditions, 19281 events. 13774/19281 cut-off events. For 544012/544083 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 109854 event pairs, 3498 based on Foata normal form. 89/19359 useless extension candidates. Maximal degree in co-relation 139931. Up to 14722 conditions per place. [2024-06-14 13:21:34,453 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 310 selfloop transitions, 300 changer transitions 0/616 dead transitions. [2024-06-14 13:21:34,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 616 transitions, 10480 flow [2024-06-14 13:21:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:21:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:21:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 333 transitions. [2024-06-14 13:21:34,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4833091436865022 [2024-06-14 13:21:34,455 INFO L175 Difference]: Start difference. First operand has 203 places, 459 transitions, 7170 flow. Second operand 13 states and 333 transitions. [2024-06-14 13:21:34,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 616 transitions, 10480 flow [2024-06-14 13:21:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 616 transitions, 10062 flow, removed 199 selfloop flow, removed 2 redundant places. [2024-06-14 13:21:35,926 INFO L231 Difference]: Finished difference. Result has 218 places, 512 transitions, 8373 flow [2024-06-14 13:21:35,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8373, PETRI_PLACES=218, PETRI_TRANSITIONS=512} [2024-06-14 13:21:35,927 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 162 predicate places. [2024-06-14 13:21:35,927 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 512 transitions, 8373 flow [2024-06-14 13:21:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:35,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:35,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:21:35,927 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:35,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1164257395, now seen corresponding path program 1 times [2024-06-14 13:21:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:35,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093466398] [2024-06-14 13:21:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:35,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:38,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093466398] [2024-06-14 13:21:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093466398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:38,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:38,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804011122] [2024-06-14 13:21:38,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:38,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:38,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:21:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 512 transitions, 8373 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:38,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:38,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:21:38,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand