./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe015_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe015_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:06:36,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:06:36,175 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:06:36,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:06:36,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:06:36,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:06:36,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:06:36,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:06:36,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:06:36,207 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:06:36,207 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:06:36,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:06:36,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:06:36,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:06:36,210 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:06:36,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:06:36,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:06:36,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:06:36,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:06:36,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:06:36,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:06:36,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:06:36,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:06:36,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:06:36,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:06:36,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:06:36,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:06:36,213 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:06:36,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:06:36,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:06:36,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:06:36,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:06:36,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:06:36,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:06:36,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:06:36,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:06:36,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:06:36,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:06:36,216 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:06:36,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:06:36,216 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:06:36,217 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:06:36,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:06:36,217 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:06:36,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:06:36,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:06:36,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:06:36,450 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:06:36,451 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:06:36,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe015_power.oepc.yml/witness.yml [2024-06-20 17:06:36,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:06:36,628 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:06:36,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-20 17:06:37,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:06:37,866 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:06:37,866 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-20 17:06:37,877 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87dba1122/f62bfdf2db5242979560a4ad0e6f7866/FLAGc698ef310 [2024-06-20 17:06:37,886 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87dba1122/f62bfdf2db5242979560a4ad0e6f7866 [2024-06-20 17:06:37,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:06:37,888 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:06:37,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:06:37,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:06:37,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:06:37,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:36" (1/2) ... [2024-06-20 17:06:37,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773c568c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:37, skipping insertion in model container [2024-06-20 17:06:37,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:36" (1/2) ... [2024-06-20 17:06:37,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63f55c0c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:06:37, skipping insertion in model container [2024-06-20 17:06:37,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:06:37" (2/2) ... [2024-06-20 17:06:37,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773c568c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:37, skipping insertion in model container [2024-06-20 17:06:37,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:06:37" (2/2) ... [2024-06-20 17:06:37,896 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:06:38,006 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:06:38,007 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$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)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:06:38,007 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:06:38,007 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$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)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:06:38,007 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:06:38,007 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-20 17:06:38,044 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:06:38,381 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:06:38,403 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:06:38,537 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:06:38,569 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:06:38,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38 WrapperNode [2024-06-20 17:06:38,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:06:38,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:06:38,572 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:06:38,572 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:06:38,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,623 INFO L138 Inliner]: procedures = 175, calls = 111, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 341 [2024-06-20 17:06:38,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:06:38,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:06:38,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:06:38,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:06:38,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,683 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 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]. [2024-06-20 17:06:38,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,698 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:06:38,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:06:38,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:06:38,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:06:38,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (1/1) ... [2024-06-20 17:06:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:06:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:06:38,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:06:38,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:06:38,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:06:38,793 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:06:38,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:06:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:06:38,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:06:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:06:38,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:06:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:06:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:06:38,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:06:38,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:06:38,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:06:38,796 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:06:38,957 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:06:38,959 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:06:39,556 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:06:39,556 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:06:40,075 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:06:40,075 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:06:40,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:06:40 BoogieIcfgContainer [2024-06-20 17:06:40,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:06:40,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:06:40,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:06:40,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:06:40,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:06:36" (1/4) ... [2024-06-20 17:06:40,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a91fd7d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:06:40, skipping insertion in model container [2024-06-20 17:06:40,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:06:37" (2/4) ... [2024-06-20 17:06:40,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a91fd7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:06:40, skipping insertion in model container [2024-06-20 17:06:40,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:06:38" (3/4) ... [2024-06-20 17:06:40,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a91fd7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:06:40, skipping insertion in model container [2024-06-20 17:06:40,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:06:40" (4/4) ... [2024-06-20 17:06:40,082 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.oepc.i [2024-06-20 17:06:40,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:06:40,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:06:40,096 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:06:40,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:06:40,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 17:06:40,210 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 17:06:40,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:06:40,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:06:40,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 17:06:40,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 17:06:40,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:06:40,232 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;@774f52bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:06:40,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:06:40,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:06:40,237 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:06:40,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:06:40,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:40,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:06:40,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:40,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1083369642, now seen corresponding path program 1 times [2024-06-20 17:06:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84722769] [2024-06-20 17:06:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:41,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84722769] [2024-06-20 17:06:41,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84722769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:41,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:06:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259482952] [2024-06-20 17:06:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:41,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:06:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:06:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:06:41,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 17:06:41,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:41,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:41,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 17:06:41,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:42,629 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-20 17:06:42,630 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 17:06:42,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2149 events. 1412/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10299 event pairs, 956 based on Foata normal form. 1/2113 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-20 17:06:42,643 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 17:06:42,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-20 17:06:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:06:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:06:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 17:06:42,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-20 17:06:42,653 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-20 17:06:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-20 17:06:42,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:42,656 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 17:06:42,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 17:06:42,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 17:06:42,660 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 17:06:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:42,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:42,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:42,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:06:42,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:42,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:42,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1736206633, now seen corresponding path program 1 times [2024-06-20 17:06:42,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:42,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464499580] [2024-06-20 17:06:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:42,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:43,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:43,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464499580] [2024-06-20 17:06:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464499580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:43,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:43,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:06:43,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29991157] [2024-06-20 17:06:43,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:06:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:06:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:06:43,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 17:06:43,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:43,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:43,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 17:06:43,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:44,543 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-20 17:06:44,544 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-20 17:06:44,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10207 event pairs, 654 based on Foata normal form. 6/2134 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-20 17:06:44,555 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 17:06:44,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-20 17:06:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:06:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:06:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-20 17:06:44,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-20 17:06:44,559 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-20 17:06:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-20 17:06:44,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:06:44,562 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-20 17:06:44,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-20 17:06:44,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-20 17:06:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-20 17:06:44,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:44,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:44,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:06:44,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:44,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash 390862375, now seen corresponding path program 1 times [2024-06-20 17:06:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231583772] [2024-06-20 17:06:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:46,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231583772] [2024-06-20 17:06:46,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231583772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:46,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:46,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:46,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096951860] [2024-06-20 17:06:46,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:46,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:46,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:46,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:46,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 17:06:46,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:46,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:46,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 17:06:46,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:47,350 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-20 17:06:47,350 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-20 17:06:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10096 event pairs, 485 based on Foata normal form. 6/2119 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-20 17:06:47,359 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-20 17:06:47,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-20 17:06:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-20 17:06:47,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-20 17:06:47,361 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-20 17:06:47,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-20 17:06:47,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:06:47,364 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-20 17:06:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-20 17:06:47,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-20 17:06:47,365 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-20 17:06:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:47,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:47,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:06:47,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:47,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1904657385, now seen corresponding path program 1 times [2024-06-20 17:06:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:47,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914873608] [2024-06-20 17:06:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:48,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:48,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914873608] [2024-06-20 17:06:48,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914873608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:48,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:48,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:06:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380061039] [2024-06-20 17:06:48,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:48,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:06:48,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:06:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:06:48,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:06:48,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2024-06-20 17:06:48,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:48,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:06:48,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:49,333 INFO L124 PetriNetUnfolderBase]: 1386/2109 cut-off events. [2024-06-20 17:06:49,333 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-20 17:06:49,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 2109 events. 1386/2109 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10057 event pairs, 597 based on Foata normal form. 2/2108 useless extension candidates. Maximal degree in co-relation 5878. Up to 2064 conditions per place. [2024-06-20 17:06:49,343 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-20 17:06:49,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 343 flow [2024-06-20 17:06:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:06:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:06:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:06:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 17:06:49,345 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:06:49,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 343 flow [2024-06-20 17:06:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 316 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:49,350 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-20 17:06:49,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-20 17:06:49,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-20 17:06:49,351 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-20 17:06:49,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2024-06-20 17:06:49,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:49,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:06:49,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:49,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1085164899, now seen corresponding path program 1 times [2024-06-20 17:06:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927630747] [2024-06-20 17:06:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:49,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927630747] [2024-06-20 17:06:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927630747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:49,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:06:49,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445876829] [2024-06-20 17:06:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:49,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:06:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:06:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:06:49,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 17:06:49,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:49,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:49,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 17:06:49,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:49,743 INFO L124 PetriNetUnfolderBase]: 717/1268 cut-off events. [2024-06-20 17:06:49,743 INFO L125 PetriNetUnfolderBase]: For 1670/1705 co-relation queries the response was YES. [2024-06-20 17:06:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1268 events. 717/1268 cut-off events. For 1670/1705 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7231 event pairs, 322 based on Foata normal form. 105/1300 useless extension candidates. Maximal degree in co-relation 3606. Up to 776 conditions per place. [2024-06-20 17:06:49,750 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 34 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-20 17:06:49,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 339 flow [2024-06-20 17:06:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:06:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:06:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-20 17:06:49,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 17:06:49,751 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 3 states and 78 transitions. [2024-06-20 17:06:49,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 339 flow [2024-06-20 17:06:49,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:06:49,753 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 235 flow [2024-06-20 17:06:49,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-20 17:06:49,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-20 17:06:49,754 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 235 flow [2024-06-20 17:06:49,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:49,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:49,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:49,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:06:49,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:49,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash -719870856, now seen corresponding path program 1 times [2024-06-20 17:06:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:49,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820435081] [2024-06-20 17:06:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820435081] [2024-06-20 17:06:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820435081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:06:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007568156] [2024-06-20 17:06:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:06:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:06:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:06:51,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:06:51,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:51,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:51,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:06:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:52,109 INFO L124 PetriNetUnfolderBase]: 1519/2370 cut-off events. [2024-06-20 17:06:52,110 INFO L125 PetriNetUnfolderBase]: For 5035/5035 co-relation queries the response was YES. [2024-06-20 17:06:52,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2370 events. 1519/2370 cut-off events. For 5035/5035 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11969 event pairs, 667 based on Foata normal form. 4/2371 useless extension candidates. Maximal degree in co-relation 7794. Up to 2277 conditions per place. [2024-06-20 17:06:52,127 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-20 17:06:52,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 480 flow [2024-06-20 17:06:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 17:06:52,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 17:06:52,131 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 235 flow. Second operand 6 states and 111 transitions. [2024-06-20 17:06:52,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 480 flow [2024-06-20 17:06:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 17:06:52,137 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-20 17:06:52,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-20 17:06:52,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-20 17:06:52,141 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-20 17:06:52,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:52,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:52,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:52,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:06:52,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:52,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -193226736, now seen corresponding path program 2 times [2024-06-20 17:06:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:52,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714523662] [2024-06-20 17:06:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:52,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:53,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714523662] [2024-06-20 17:06:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714523662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:53,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:53,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:06:53,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818540776] [2024-06-20 17:06:53,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:53,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:06:53,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:06:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:06:53,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:06:53,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:53,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:53,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:06:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:54,526 INFO L124 PetriNetUnfolderBase]: 1511/2351 cut-off events. [2024-06-20 17:06:54,526 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2024-06-20 17:06:54,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8124 conditions, 2351 events. 1511/2351 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11895 event pairs, 674 based on Foata normal form. 4/2349 useless extension candidates. Maximal degree in co-relation 8103. Up to 2232 conditions per place. [2024-06-20 17:06:54,539 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-20 17:06:54,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 541 flow [2024-06-20 17:06:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:06:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:06:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:06:54,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-20 17:06:54,541 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:06:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 541 flow [2024-06-20 17:06:54,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 502 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:54,545 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 351 flow [2024-06-20 17:06:54,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-20 17:06:54,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-20 17:06:54,546 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 351 flow [2024-06-20 17:06:54,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:54,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:54,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:06:54,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:54,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -257694857, now seen corresponding path program 1 times [2024-06-20 17:06:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210802847] [2024-06-20 17:06:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:54,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:56,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:56,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210802847] [2024-06-20 17:06:56,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210802847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:56,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:56,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:56,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367317635] [2024-06-20 17:06:56,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:56,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:06:56,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:56,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:56,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:06:56,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:57,357 INFO L124 PetriNetUnfolderBase]: 1548/2427 cut-off events. [2024-06-20 17:06:57,358 INFO L125 PetriNetUnfolderBase]: For 8302/8302 co-relation queries the response was YES. [2024-06-20 17:06:57,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8932 conditions, 2427 events. 1548/2427 cut-off events. For 8302/8302 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12325 event pairs, 665 based on Foata normal form. 2/2426 useless extension candidates. Maximal degree in co-relation 8910. Up to 2313 conditions per place. [2024-06-20 17:06:57,408 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-20 17:06:57,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 704 flow [2024-06-20 17:06:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:06:57,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-20 17:06:57,410 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 351 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:06:57,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 704 flow [2024-06-20 17:06:57,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 641 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:57,415 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 424 flow [2024-06-20 17:06:57,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 17:06:57,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-20 17:06:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 424 flow [2024-06-20 17:06:57,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:57,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:57,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:57,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:06:57,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:06:57,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -306288423, now seen corresponding path program 2 times [2024-06-20 17:06:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:57,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285498031] [2024-06-20 17:06:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285498031] [2024-06-20 17:06:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285498031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:59,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:59,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:06:59,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612086974] [2024-06-20 17:06:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:59,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:06:59,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:06:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:06:59,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:06:59,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:59,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:59,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:06:59,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:00,349 INFO L124 PetriNetUnfolderBase]: 1545/2422 cut-off events. [2024-06-20 17:07:00,349 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-20 17:07:00,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2422 events. 1545/2422 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12316 event pairs, 664 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 9331. Up to 2278 conditions per place. [2024-06-20 17:07:00,360 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-20 17:07:00,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 732 flow [2024-06-20 17:07:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:07:00,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:07:00,366 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 424 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:07:00,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 732 flow [2024-06-20 17:07:00,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 689 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:00,372 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 465 flow [2024-06-20 17:07:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=381, 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=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-20 17:07:00,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-20 17:07:00,373 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 465 flow [2024-06-20 17:07:00,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:00,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:00,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:00,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:07:00,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:00,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1717362663, now seen corresponding path program 1 times [2024-06-20 17:07:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653044771] [2024-06-20 17:07:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653044771] [2024-06-20 17:07:02,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653044771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:02,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:07:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533499459] [2024-06-20 17:07:02,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:07:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:07:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:07:02,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:02,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:02,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:03,073 INFO L124 PetriNetUnfolderBase]: 1542/2415 cut-off events. [2024-06-20 17:07:03,074 INFO L125 PetriNetUnfolderBase]: For 12676/12676 co-relation queries the response was YES. [2024-06-20 17:07:03,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9753 conditions, 2415 events. 1542/2415 cut-off events. For 12676/12676 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12330 event pairs, 669 based on Foata normal form. 1/2413 useless extension candidates. Maximal degree in co-relation 9727. Up to 2353 conditions per place. [2024-06-20 17:07:03,083 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 70 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-20 17:07:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 667 flow [2024-06-20 17:07:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:07:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:07:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-20 17:07:03,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:07:03,085 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 465 flow. Second operand 5 states and 85 transitions. [2024-06-20 17:07:03,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 667 flow [2024-06-20 17:07:03,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 605 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:03,092 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 449 flow [2024-06-20 17:07:03,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-20 17:07:03,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-20 17:07:03,093 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 449 flow [2024-06-20 17:07:03,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:03,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:03,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:07:03,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:03,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash 845009829, now seen corresponding path program 1 times [2024-06-20 17:07:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:03,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601760399] [2024-06-20 17:07:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:03,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:03,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:03,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601760399] [2024-06-20 17:07:03,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601760399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:03,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:03,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978276204] [2024-06-20 17:07:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:03,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:07:03,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:07:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:07:03,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 17:07:03,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:03,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:03,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 17:07:03,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:03,571 INFO L124 PetriNetUnfolderBase]: 816/1516 cut-off events. [2024-06-20 17:07:03,571 INFO L125 PetriNetUnfolderBase]: For 7939/8016 co-relation queries the response was YES. [2024-06-20 17:07:03,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 1516 events. 816/1516 cut-off events. For 7939/8016 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8951 event pairs, 308 based on Foata normal form. 85/1524 useless extension candidates. Maximal degree in co-relation 5817. Up to 765 conditions per place. [2024-06-20 17:07:03,580 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-06-20 17:07:03,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 603 flow [2024-06-20 17:07:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:07:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:07:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-20 17:07:03,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-20 17:07:03,582 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 449 flow. Second operand 5 states and 101 transitions. [2024-06-20 17:07:03,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 603 flow [2024-06-20 17:07:03,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 581 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:03,587 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 497 flow [2024-06-20 17:07:03,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-20 17:07:03,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-20 17:07:03,588 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 497 flow [2024-06-20 17:07:03,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:03,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:03,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:03,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:07:03,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:03,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1663546775, now seen corresponding path program 1 times [2024-06-20 17:07:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:03,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152331656] [2024-06-20 17:07:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:05,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:05,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152331656] [2024-06-20 17:07:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152331656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:05,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068609917] [2024-06-20 17:07:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:05,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:05,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:05,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:05,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 497 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:05,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:05,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:05,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:06,595 INFO L124 PetriNetUnfolderBase]: 1481/2350 cut-off events. [2024-06-20 17:07:06,596 INFO L125 PetriNetUnfolderBase]: For 13901/13901 co-relation queries the response was YES. [2024-06-20 17:07:06,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 2350 events. 1481/2350 cut-off events. For 13901/13901 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12154 event pairs, 610 based on Foata normal form. 6/2342 useless extension candidates. Maximal degree in co-relation 9975. Up to 2149 conditions per place. [2024-06-20 17:07:06,607 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 68 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-20 17:07:06,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 819 flow [2024-06-20 17:07:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:07:06,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-20 17:07:06,625 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 497 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:07:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 819 flow [2024-06-20 17:07:06,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 816 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:06,631 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 638 flow [2024-06-20 17:07:06,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=638, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-20 17:07:06,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-20 17:07:06,632 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 638 flow [2024-06-20 17:07:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:07:06,633 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:06,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1770899432, now seen corresponding path program 1 times [2024-06-20 17:07:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552837205] [2024-06-20 17:07:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:08,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:08,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552837205] [2024-06-20 17:07:08,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552837205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:08,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:08,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319175762] [2024-06-20 17:07:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:08,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:08,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:08,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:08,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 638 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:08,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:08,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:09,465 INFO L124 PetriNetUnfolderBase]: 1535/2458 cut-off events. [2024-06-20 17:07:09,465 INFO L125 PetriNetUnfolderBase]: For 17734/17734 co-relation queries the response was YES. [2024-06-20 17:07:09,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11399 conditions, 2458 events. 1535/2458 cut-off events. For 17734/17734 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12881 event pairs, 623 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 11368. Up to 2243 conditions per place. [2024-06-20 17:07:09,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 104 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-06-20 17:07:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1138 flow [2024-06-20 17:07:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:07:09,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-20 17:07:09,499 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 638 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:07:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1138 flow [2024-06-20 17:07:09,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 137 transitions, 1095 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:09,513 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 793 flow [2024-06-20 17:07:09,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=793, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-20 17:07:09,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-20 17:07:09,514 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 793 flow [2024-06-20 17:07:09,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:09,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:09,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:09,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:07:09,514 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:09,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash 141710420, now seen corresponding path program 2 times [2024-06-20 17:07:09,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:09,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906502008] [2024-06-20 17:07:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:09,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:11,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906502008] [2024-06-20 17:07:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906502008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:11,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103827545] [2024-06-20 17:07:11,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:11,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:11,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:11,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:11,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:11,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:11,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:12,933 INFO L124 PetriNetUnfolderBase]: 1612/2592 cut-off events. [2024-06-20 17:07:12,933 INFO L125 PetriNetUnfolderBase]: For 21278/21278 co-relation queries the response was YES. [2024-06-20 17:07:12,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12444 conditions, 2592 events. 1612/2592 cut-off events. For 21278/21278 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13718 event pairs, 625 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 12409. Up to 2331 conditions per place. [2024-06-20 17:07:12,948 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-20 17:07:12,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1415 flow [2024-06-20 17:07:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:07:12,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-20 17:07:12,950 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 793 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:07:12,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1415 flow [2024-06-20 17:07:12,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 146 transitions, 1310 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:12,968 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 1071 flow [2024-06-20 17:07:12,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1071, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-06-20 17:07:12,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-20 17:07:12,968 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 1071 flow [2024-06-20 17:07:12,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:12,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:12,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:12,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:07:12,969 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:12,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 144567380, now seen corresponding path program 3 times [2024-06-20 17:07:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743530964] [2024-06-20 17:07:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:15,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:15,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743530964] [2024-06-20 17:07:15,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743530964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:15,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:15,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514647572] [2024-06-20 17:07:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:15,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:15,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:15,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 1071 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:15,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:15,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:15,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:16,140 INFO L124 PetriNetUnfolderBase]: 1620/2621 cut-off events. [2024-06-20 17:07:16,140 INFO L125 PetriNetUnfolderBase]: For 24116/24116 co-relation queries the response was YES. [2024-06-20 17:07:16,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12936 conditions, 2621 events. 1620/2621 cut-off events. For 24116/24116 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14003 event pairs, 658 based on Foata normal form. 4/2622 useless extension candidates. Maximal degree in co-relation 12896. Up to 2377 conditions per place. [2024-06-20 17:07:16,156 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 102 selfloop transitions, 40 changer transitions 0/147 dead transitions. [2024-06-20 17:07:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 147 transitions, 1486 flow [2024-06-20 17:07:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:07:16,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 17:07:16,159 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 1071 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:07:16,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 147 transitions, 1486 flow [2024-06-20 17:07:16,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1439 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:16,202 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1138 flow [2024-06-20 17:07:16,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-20 17:07:16,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-20 17:07:16,204 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1138 flow [2024-06-20 17:07:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:16,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:16,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:16,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:07:16,205 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1424580298, now seen corresponding path program 4 times [2024-06-20 17:07:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515798749] [2024-06-20 17:07:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515798749] [2024-06-20 17:07:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515798749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:18,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037135655] [2024-06-20 17:07:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:18,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:18,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1138 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:18,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:18,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:19,347 INFO L124 PetriNetUnfolderBase]: 1628/2639 cut-off events. [2024-06-20 17:07:19,348 INFO L125 PetriNetUnfolderBase]: For 27497/27497 co-relation queries the response was YES. [2024-06-20 17:07:19,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13277 conditions, 2639 events. 1628/2639 cut-off events. For 27497/27497 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14115 event pairs, 669 based on Foata normal form. 4/2640 useless extension candidates. Maximal degree in co-relation 13235. Up to 2465 conditions per place. [2024-06-20 17:07:19,364 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 120 selfloop transitions, 21 changer transitions 0/146 dead transitions. [2024-06-20 17:07:19,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1541 flow [2024-06-20 17:07:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:07:19,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-20 17:07:19,367 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1138 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:07:19,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1541 flow [2024-06-20 17:07:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 146 transitions, 1446 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:19,390 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 1123 flow [2024-06-20 17:07:19,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1123, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-20 17:07:19,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-20 17:07:19,391 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 1123 flow [2024-06-20 17:07:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:19,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:07:19,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:19,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1130404776, now seen corresponding path program 1 times [2024-06-20 17:07:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008526776] [2024-06-20 17:07:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:21,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008526776] [2024-06-20 17:07:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008526776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:21,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394714669] [2024-06-20 17:07:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:21,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:21,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:21,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:21,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:21,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:22,472 INFO L124 PetriNetUnfolderBase]: 1638/2654 cut-off events. [2024-06-20 17:07:22,472 INFO L125 PetriNetUnfolderBase]: For 30191/30191 co-relation queries the response was YES. [2024-06-20 17:07:22,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13543 conditions, 2654 events. 1638/2654 cut-off events. For 30191/30191 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14251 event pairs, 641 based on Foata normal form. 2/2653 useless extension candidates. Maximal degree in co-relation 13499. Up to 2389 conditions per place. [2024-06-20 17:07:22,487 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 43 changer transitions 0/140 dead transitions. [2024-06-20 17:07:22,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 1540 flow [2024-06-20 17:07:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 17:07:22,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 17:07:22,489 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 1123 flow. Second operand 6 states and 116 transitions. [2024-06-20 17:07:22,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 1540 flow [2024-06-20 17:07:22,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1486 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:22,513 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1208 flow [2024-06-20 17:07:22,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1208, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-20 17:07:22,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-20 17:07:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1208 flow [2024-06-20 17:07:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:22,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:22,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:22,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:07:22,514 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:22,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1601866610, now seen corresponding path program 5 times [2024-06-20 17:07:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:22,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903280906] [2024-06-20 17:07:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903280906] [2024-06-20 17:07:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903280906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482478735] [2024-06-20 17:07:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:24,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:24,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1208 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:24,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:24,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:24,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:25,633 INFO L124 PetriNetUnfolderBase]: 1634/2656 cut-off events. [2024-06-20 17:07:25,633 INFO L125 PetriNetUnfolderBase]: For 33565/33565 co-relation queries the response was YES. [2024-06-20 17:07:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13804 conditions, 2656 events. 1634/2656 cut-off events. For 33565/33565 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14254 event pairs, 668 based on Foata normal form. 4/2650 useless extension candidates. Maximal degree in co-relation 13759. Up to 2438 conditions per place. [2024-06-20 17:07:25,648 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 118 selfloop transitions, 24 changer transitions 0/147 dead transitions. [2024-06-20 17:07:25,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1588 flow [2024-06-20 17:07:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:07:25,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-20 17:07:25,656 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1208 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:07:25,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1588 flow [2024-06-20 17:07:25,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 147 transitions, 1529 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:25,684 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 1214 flow [2024-06-20 17:07:25,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-20 17:07:25,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-20 17:07:25,684 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 1214 flow [2024-06-20 17:07:25,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:25,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:25,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:07:25,685 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -65210676, now seen corresponding path program 2 times [2024-06-20 17:07:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:25,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714702149] [2024-06-20 17:07:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:27,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714702149] [2024-06-20 17:07:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714702149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:27,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188035530] [2024-06-20 17:07:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:27,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:27,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:27,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:27,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:28,900 INFO L124 PetriNetUnfolderBase]: 1608/2605 cut-off events. [2024-06-20 17:07:28,900 INFO L125 PetriNetUnfolderBase]: For 36807/36807 co-relation queries the response was YES. [2024-06-20 17:07:28,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13665 conditions, 2605 events. 1608/2605 cut-off events. For 36807/36807 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13935 event pairs, 642 based on Foata normal form. 6/2591 useless extension candidates. Maximal degree in co-relation 13618. Up to 2362 conditions per place. [2024-06-20 17:07:28,916 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 86 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2024-06-20 17:07:28,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 132 transitions, 1520 flow [2024-06-20 17:07:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:07:28,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-20 17:07:28,918 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 1214 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:07:28,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 132 transitions, 1520 flow [2024-06-20 17:07:28,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 132 transitions, 1438 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:28,943 INFO L231 Difference]: Finished difference. Result has 110 places, 118 transitions, 1222 flow [2024-06-20 17:07:28,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=110, PETRI_TRANSITIONS=118} [2024-06-20 17:07:28,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-20 17:07:28,944 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 118 transitions, 1222 flow [2024-06-20 17:07:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:28,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:28,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:28,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:07:28,944 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:28,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 548145112, now seen corresponding path program 6 times [2024-06-20 17:07:28,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:28,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206768601] [2024-06-20 17:07:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206768601] [2024-06-20 17:07:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206768601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:30,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:30,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418509024] [2024-06-20 17:07:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:30,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:30,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:30,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:30,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:30,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:31,885 INFO L124 PetriNetUnfolderBase]: 1678/2755 cut-off events. [2024-06-20 17:07:31,885 INFO L125 PetriNetUnfolderBase]: For 40337/40337 co-relation queries the response was YES. [2024-06-20 17:07:31,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14483 conditions, 2755 events. 1678/2755 cut-off events. For 40337/40337 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15068 event pairs, 641 based on Foata normal form. 4/2756 useless extension candidates. Maximal degree in co-relation 14435. Up to 2443 conditions per place. [2024-06-20 17:07:31,918 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 119 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-06-20 17:07:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 170 transitions, 1795 flow [2024-06-20 17:07:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:07:31,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-20 17:07:31,920 INFO L175 Difference]: Start difference. First operand has 110 places, 118 transitions, 1222 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:07:31,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 170 transitions, 1795 flow [2024-06-20 17:07:31,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 170 transitions, 1666 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:31,953 INFO L231 Difference]: Finished difference. Result has 115 places, 128 transitions, 1357 flow [2024-06-20 17:07:31,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=115, PETRI_TRANSITIONS=128} [2024-06-20 17:07:31,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-20 17:07:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 128 transitions, 1357 flow [2024-06-20 17:07:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:31,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:31,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:07:31,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:31,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash 55589942, now seen corresponding path program 7 times [2024-06-20 17:07:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302283044] [2024-06-20 17:07:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302283044] [2024-06-20 17:07:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302283044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:33,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498812406] [2024-06-20 17:07:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:33,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:33,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 128 transitions, 1357 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:33,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:33,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:33,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:34,656 INFO L124 PetriNetUnfolderBase]: 1734/2865 cut-off events. [2024-06-20 17:07:34,656 INFO L125 PetriNetUnfolderBase]: For 44625/44625 co-relation queries the response was YES. [2024-06-20 17:07:34,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15302 conditions, 2865 events. 1734/2865 cut-off events. For 44625/44625 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15943 event pairs, 485 based on Foata normal form. 4/2866 useless extension candidates. Maximal degree in co-relation 15251. Up to 2391 conditions per place. [2024-06-20 17:07:34,672 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 61 changer transitions 0/180 dead transitions. [2024-06-20 17:07:34,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 180 transitions, 1949 flow [2024-06-20 17:07:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:07:34,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 17:07:34,674 INFO L175 Difference]: Start difference. First operand has 115 places, 128 transitions, 1357 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:07:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 180 transitions, 1949 flow [2024-06-20 17:07:34,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1837 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:34,716 INFO L231 Difference]: Finished difference. Result has 119 places, 137 transitions, 1522 flow [2024-06-20 17:07:34,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1522, PETRI_PLACES=119, PETRI_TRANSITIONS=137} [2024-06-20 17:07:34,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-20 17:07:34,717 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 137 transitions, 1522 flow [2024-06-20 17:07:34,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:34,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:34,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:34,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:07:34,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:34,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1123731592, now seen corresponding path program 1 times [2024-06-20 17:07:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992281524] [2024-06-20 17:07:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:37,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992281524] [2024-06-20 17:07:37,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992281524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:37,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:37,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19009512] [2024-06-20 17:07:37,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:37,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:37,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 137 transitions, 1522 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:37,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:37,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:37,987 INFO L124 PetriNetUnfolderBase]: 1731/2864 cut-off events. [2024-06-20 17:07:37,987 INFO L125 PetriNetUnfolderBase]: For 49592/49592 co-relation queries the response was YES. [2024-06-20 17:07:37,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15648 conditions, 2864 events. 1731/2864 cut-off events. For 49592/49592 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15981 event pairs, 774 based on Foata normal form. 1/2862 useless extension candidates. Maximal degree in co-relation 15596. Up to 2730 conditions per place. [2024-06-20 17:07:38,006 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 138 selfloop transitions, 11 changer transitions 0/154 dead transitions. [2024-06-20 17:07:38,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1895 flow [2024-06-20 17:07:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 17:07:38,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-20 17:07:38,007 INFO L175 Difference]: Start difference. First operand has 119 places, 137 transitions, 1522 flow. Second operand 6 states and 99 transitions. [2024-06-20 17:07:38,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1895 flow [2024-06-20 17:07:38,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1754 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:38,050 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1444 flow [2024-06-20 17:07:38,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-06-20 17:07:38,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-20 17:07:38,050 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1444 flow [2024-06-20 17:07:38,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:38,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:38,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:38,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:07:38,051 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:38,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1118017672, now seen corresponding path program 2 times [2024-06-20 17:07:38,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:38,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992629673] [2024-06-20 17:07:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:39,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992629673] [2024-06-20 17:07:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992629673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:07:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903366651] [2024-06-20 17:07:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:07:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:07:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:07:39,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:39,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1444 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:39,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:39,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:40,808 INFO L124 PetriNetUnfolderBase]: 1729/2855 cut-off events. [2024-06-20 17:07:40,808 INFO L125 PetriNetUnfolderBase]: For 51641/51641 co-relation queries the response was YES. [2024-06-20 17:07:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15829 conditions, 2855 events. 1729/2855 cut-off events. For 51641/51641 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16012 event pairs, 773 based on Foata normal form. 1/2853 useless extension candidates. Maximal degree in co-relation 15777. Up to 2735 conditions per place. [2024-06-20 17:07:40,827 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 136 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-06-20 17:07:40,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 152 transitions, 1788 flow [2024-06-20 17:07:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:07:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:07:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 17:07:40,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682170542635659 [2024-06-20 17:07:40,829 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1444 flow. Second operand 6 states and 95 transitions. [2024-06-20 17:07:40,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 152 transitions, 1788 flow [2024-06-20 17:07:40,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 152 transitions, 1752 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:40,864 INFO L231 Difference]: Finished difference. Result has 120 places, 142 transitions, 1459 flow [2024-06-20 17:07:40,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1459, PETRI_PLACES=120, PETRI_TRANSITIONS=142} [2024-06-20 17:07:40,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-20 17:07:40,869 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 142 transitions, 1459 flow [2024-06-20 17:07:40,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:40,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:40,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:40,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:07:40,870 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:40,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -475939054, now seen corresponding path program 1 times [2024-06-20 17:07:40,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:40,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500573175] [2024-06-20 17:07:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500573175] [2024-06-20 17:07:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500573175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:43,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:43,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239186588] [2024-06-20 17:07:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:43,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:43,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 142 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:43,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:43,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:43,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:44,218 INFO L124 PetriNetUnfolderBase]: 1923/3166 cut-off events. [2024-06-20 17:07:44,218 INFO L125 PetriNetUnfolderBase]: For 62005/62005 co-relation queries the response was YES. [2024-06-20 17:07:44,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18212 conditions, 3166 events. 1923/3166 cut-off events. For 62005/62005 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18023 event pairs, 563 based on Foata normal form. 1/3164 useless extension candidates. Maximal degree in co-relation 18159. Up to 2434 conditions per place. [2024-06-20 17:07:44,241 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 103 selfloop transitions, 66 changer transitions 0/174 dead transitions. [2024-06-20 17:07:44,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 174 transitions, 2000 flow [2024-06-20 17:07:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:07:44,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-20 17:07:44,242 INFO L175 Difference]: Start difference. First operand has 120 places, 142 transitions, 1459 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:07:44,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 174 transitions, 2000 flow [2024-06-20 17:07:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1965 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:44,296 INFO L231 Difference]: Finished difference. Result has 124 places, 152 transitions, 1728 flow [2024-06-20 17:07:44,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1728, PETRI_PLACES=124, PETRI_TRANSITIONS=152} [2024-06-20 17:07:44,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-20 17:07:44,297 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 152 transitions, 1728 flow [2024-06-20 17:07:44,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:44,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:44,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:07:44,297 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash -475938868, now seen corresponding path program 1 times [2024-06-20 17:07:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226415593] [2024-06-20 17:07:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226415593] [2024-06-20 17:07:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226415593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65242169] [2024-06-20 17:07:46,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:46,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:46,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 152 transitions, 1728 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:46,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:46,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:46,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:47,981 INFO L124 PetriNetUnfolderBase]: 1969/3241 cut-off events. [2024-06-20 17:07:47,981 INFO L125 PetriNetUnfolderBase]: For 74900/74900 co-relation queries the response was YES. [2024-06-20 17:07:47,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 3241 events. 1969/3241 cut-off events. For 74900/74900 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18454 event pairs, 654 based on Foata normal form. 6/3237 useless extension candidates. Maximal degree in co-relation 20293. Up to 2975 conditions per place. [2024-06-20 17:07:48,003 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 33 changer transitions 0/180 dead transitions. [2024-06-20 17:07:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 180 transitions, 2298 flow [2024-06-20 17:07:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:07:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-20 17:07:48,005 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 1728 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:07:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 180 transitions, 2298 flow [2024-06-20 17:07:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 2258 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:07:48,077 INFO L231 Difference]: Finished difference. Result has 129 places, 162 transitions, 1904 flow [2024-06-20 17:07:48,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1904, PETRI_PLACES=129, PETRI_TRANSITIONS=162} [2024-06-20 17:07:48,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-20 17:07:48,077 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 162 transitions, 1904 flow [2024-06-20 17:07:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:48,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:48,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:48,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:07:48,078 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:48,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash -298807348, now seen corresponding path program 2 times [2024-06-20 17:07:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:48,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619857092] [2024-06-20 17:07:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619857092] [2024-06-20 17:07:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619857092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:50,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:50,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:50,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874153597] [2024-06-20 17:07:50,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:50,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:50,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:50,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 162 transitions, 1904 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:50,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:50,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:51,083 INFO L124 PetriNetUnfolderBase]: 2001/3284 cut-off events. [2024-06-20 17:07:51,083 INFO L125 PetriNetUnfolderBase]: For 83043/83043 co-relation queries the response was YES. [2024-06-20 17:07:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21518 conditions, 3284 events. 2001/3284 cut-off events. For 83043/83043 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18673 event pairs, 665 based on Foata normal form. 7/3271 useless extension candidates. Maximal degree in co-relation 21460. Up to 2907 conditions per place. [2024-06-20 17:07:51,107 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-20 17:07:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 203 transitions, 2697 flow [2024-06-20 17:07:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:07:51,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-20 17:07:51,109 INFO L175 Difference]: Start difference. First operand has 129 places, 162 transitions, 1904 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:07:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 203 transitions, 2697 flow [2024-06-20 17:07:51,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 203 transitions, 2603 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 17:07:51,189 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2163 flow [2024-06-20 17:07:51,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2163, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-20 17:07:51,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-20 17:07:51,190 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2163 flow [2024-06-20 17:07:51,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:51,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:51,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:07:51,190 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:51,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash -471290728, now seen corresponding path program 3 times [2024-06-20 17:07:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:51,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072730513] [2024-06-20 17:07:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:53,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:53,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072730513] [2024-06-20 17:07:53,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072730513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:53,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:53,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:07:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129132822] [2024-06-20 17:07:53,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:07:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:07:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:07:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:53,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2163 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:53,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:53,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:53,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:54,502 INFO L124 PetriNetUnfolderBase]: 2022/3320 cut-off events. [2024-06-20 17:07:54,503 INFO L125 PetriNetUnfolderBase]: For 93336/93336 co-relation queries the response was YES. [2024-06-20 17:07:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22525 conditions, 3320 events. 2022/3320 cut-off events. For 93336/93336 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19008 event pairs, 668 based on Foata normal form. 11/3311 useless extension candidates. Maximal degree in co-relation 22464. Up to 3008 conditions per place. [2024-06-20 17:07:54,530 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 56 changer transitions 0/205 dead transitions. [2024-06-20 17:07:54,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 205 transitions, 2804 flow [2024-06-20 17:07:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:07:54,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-20 17:07:54,532 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2163 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:07:54,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 205 transitions, 2804 flow [2024-06-20 17:07:54,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 2722 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 17:07:54,620 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 2383 flow [2024-06-20 17:07:54,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2383, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2024-06-20 17:07:54,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-20 17:07:54,621 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 2383 flow [2024-06-20 17:07:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:54,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:54,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:54,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:07:54,622 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:54,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash -298561270, now seen corresponding path program 1 times [2024-06-20 17:07:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:54,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554056544] [2024-06-20 17:07:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:54,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:57,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554056544] [2024-06-20 17:07:57,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554056544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:57,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:57,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002364421] [2024-06-20 17:07:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:57,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:07:57,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 2383 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:57,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:57,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:07:57,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:59,034 INFO L124 PetriNetUnfolderBase]: 2061/3376 cut-off events. [2024-06-20 17:07:59,034 INFO L125 PetriNetUnfolderBase]: For 101398/101398 co-relation queries the response was YES. [2024-06-20 17:07:59,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23556 conditions, 3376 events. 2061/3376 cut-off events. For 101398/101398 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19275 event pairs, 645 based on Foata normal form. 14/3370 useless extension candidates. Maximal degree in co-relation 23493. Up to 3048 conditions per place. [2024-06-20 17:07:59,060 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 156 selfloop transitions, 48 changer transitions 0/209 dead transitions. [2024-06-20 17:07:59,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 209 transitions, 2934 flow [2024-06-20 17:07:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:07:59,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-20 17:07:59,061 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 2383 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:07:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 209 transitions, 2934 flow [2024-06-20 17:07:59,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 209 transitions, 2762 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:59,171 INFO L231 Difference]: Finished difference. Result has 141 places, 189 transitions, 2360 flow [2024-06-20 17:07:59,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2360, PETRI_PLACES=141, PETRI_TRANSITIONS=189} [2024-06-20 17:07:59,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-20 17:07:59,172 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 189 transitions, 2360 flow [2024-06-20 17:07:59,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:59,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:59,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:59,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:07:59,172 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:07:59,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1636968679, now seen corresponding path program 1 times [2024-06-20 17:07:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:59,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060228306] [2024-06-20 17:07:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:01,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060228306] [2024-06-20 17:08:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060228306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:01,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:01,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254531086] [2024-06-20 17:08:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:01,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:01,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:01,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 189 transitions, 2360 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:01,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:01,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:01,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:02,835 INFO L124 PetriNetUnfolderBase]: 2096/3455 cut-off events. [2024-06-20 17:08:02,835 INFO L125 PetriNetUnfolderBase]: For 105761/105761 co-relation queries the response was YES. [2024-06-20 17:08:02,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24352 conditions, 3455 events. 2096/3455 cut-off events. For 105761/105761 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19978 event pairs, 643 based on Foata normal form. 9/3461 useless extension candidates. Maximal degree in co-relation 24288. Up to 3051 conditions per place. [2024-06-20 17:08:02,862 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 172 selfloop transitions, 53 changer transitions 0/230 dead transitions. [2024-06-20 17:08:02,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 230 transitions, 3155 flow [2024-06-20 17:08:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:08:02,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 17:08:02,864 INFO L175 Difference]: Start difference. First operand has 141 places, 189 transitions, 2360 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:08:02,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 230 transitions, 3155 flow [2024-06-20 17:08:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 230 transitions, 3038 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:02,978 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2596 flow [2024-06-20 17:08:02,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2596, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-20 17:08:02,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-20 17:08:02,979 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2596 flow [2024-06-20 17:08:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:02,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:02,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:02,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:08:02,980 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1827753447, now seen corresponding path program 2 times [2024-06-20 17:08:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:02,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126387509] [2024-06-20 17:08:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126387509] [2024-06-20 17:08:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126387509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:04,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:04,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960000627] [2024-06-20 17:08:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:04,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:04,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2596 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:04,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:04,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:04,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:06,089 INFO L124 PetriNetUnfolderBase]: 2105/3456 cut-off events. [2024-06-20 17:08:06,090 INFO L125 PetriNetUnfolderBase]: For 114024/114024 co-relation queries the response was YES. [2024-06-20 17:08:06,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25061 conditions, 3456 events. 2105/3456 cut-off events. For 114024/114024 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19929 event pairs, 633 based on Foata normal form. 3/3456 useless extension candidates. Maximal degree in co-relation 24994. Up to 3186 conditions per place. [2024-06-20 17:08:06,117 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 175 selfloop transitions, 47 changer transitions 0/227 dead transitions. [2024-06-20 17:08:06,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 3203 flow [2024-06-20 17:08:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:08:06,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-20 17:08:06,119 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2596 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:08:06,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 3203 flow [2024-06-20 17:08:06,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 227 transitions, 3100 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-20 17:08:06,246 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2680 flow [2024-06-20 17:08:06,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2680, PETRI_PLACES=150, PETRI_TRANSITIONS=205} [2024-06-20 17:08:06,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-20 17:08:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2680 flow [2024-06-20 17:08:06,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:06,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:06,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:06,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:08:06,247 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:06,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 75998941, now seen corresponding path program 3 times [2024-06-20 17:08:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828256236] [2024-06-20 17:08:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828256236] [2024-06-20 17:08:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828256236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:08,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:08,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674020916] [2024-06-20 17:08:08,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:08,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:08,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:08,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:08,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 205 transitions, 2680 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:08,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:08,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:08,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:09,832 INFO L124 PetriNetUnfolderBase]: 2103/3463 cut-off events. [2024-06-20 17:08:09,832 INFO L125 PetriNetUnfolderBase]: For 121603/121603 co-relation queries the response was YES. [2024-06-20 17:08:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25269 conditions, 3463 events. 2103/3463 cut-off events. For 121603/121603 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20122 event pairs, 685 based on Foata normal form. 2/3455 useless extension candidates. Maximal degree in co-relation 25200. Up to 3227 conditions per place. [2024-06-20 17:08:09,860 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 196 selfloop transitions, 26 changer transitions 0/227 dead transitions. [2024-06-20 17:08:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 227 transitions, 3236 flow [2024-06-20 17:08:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:08:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:08:09,862 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2680 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:08:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 227 transitions, 3236 flow [2024-06-20 17:08:09,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 227 transitions, 3119 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:09,992 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 2677 flow [2024-06-20 17:08:09,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2677, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-20 17:08:09,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-20 17:08:09,993 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 2677 flow [2024-06-20 17:08:09,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:09,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:09,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:09,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:08:09,994 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:09,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 88379101, now seen corresponding path program 4 times [2024-06-20 17:08:09,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:09,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305485788] [2024-06-20 17:08:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:09,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305485788] [2024-06-20 17:08:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305485788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:12,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:12,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:12,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676537770] [2024-06-20 17:08:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:12,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:12,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:12,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 2677 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:12,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:12,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:12,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:13,776 INFO L124 PetriNetUnfolderBase]: 2090/3447 cut-off events. [2024-06-20 17:08:13,776 INFO L125 PetriNetUnfolderBase]: For 127228/127228 co-relation queries the response was YES. [2024-06-20 17:08:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25226 conditions, 3447 events. 2090/3447 cut-off events. For 127228/127228 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19996 event pairs, 655 based on Foata normal form. 3/3440 useless extension candidates. Maximal degree in co-relation 25156. Up to 3165 conditions per place. [2024-06-20 17:08:13,804 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 182 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-06-20 17:08:13,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 225 transitions, 3181 flow [2024-06-20 17:08:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:08:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-20 17:08:13,805 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 2677 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:08:13,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 225 transitions, 3181 flow [2024-06-20 17:08:13,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 225 transitions, 3089 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:13,940 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 2669 flow [2024-06-20 17:08:13,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2669, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-20 17:08:13,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-20 17:08:13,941 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 2669 flow [2024-06-20 17:08:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:13,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:13,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:13,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:08:13,942 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:13,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1763538701, now seen corresponding path program 5 times [2024-06-20 17:08:13,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066115286] [2024-06-20 17:08:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:16,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:16,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066115286] [2024-06-20 17:08:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066115286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:16,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199139111] [2024-06-20 17:08:16,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:16,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:16,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:16,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:16,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:16,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:17,362 INFO L124 PetriNetUnfolderBase]: 2072/3402 cut-off events. [2024-06-20 17:08:17,362 INFO L125 PetriNetUnfolderBase]: For 132705/132705 co-relation queries the response was YES. [2024-06-20 17:08:17,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24983 conditions, 3402 events. 2072/3402 cut-off events. For 132705/132705 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19560 event pairs, 641 based on Foata normal form. 11/3393 useless extension candidates. Maximal degree in co-relation 24912. Up to 3089 conditions per place. [2024-06-20 17:08:17,390 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 169 selfloop transitions, 55 changer transitions 0/229 dead transitions. [2024-06-20 17:08:17,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 229 transitions, 3253 flow [2024-06-20 17:08:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:08:17,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:08:17,392 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 2669 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:08:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 229 transitions, 3253 flow [2024-06-20 17:08:17,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 229 transitions, 3156 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:08:17,531 INFO L231 Difference]: Finished difference. Result has 157 places, 212 transitions, 2761 flow [2024-06-20 17:08:17,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2761, PETRI_PLACES=157, PETRI_TRANSITIONS=212} [2024-06-20 17:08:17,532 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-20 17:08:17,533 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 212 transitions, 2761 flow [2024-06-20 17:08:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:17,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:17,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:08:17,533 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:17,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1763775851, now seen corresponding path program 6 times [2024-06-20 17:08:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9322759] [2024-06-20 17:08:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9322759] [2024-06-20 17:08:19,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9322759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:19,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:19,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:08:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598838126] [2024-06-20 17:08:19,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:08:19,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:19,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:08:19,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:08:19,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:19,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 212 transitions, 2761 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:19,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:19,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:20,863 INFO L124 PetriNetUnfolderBase]: 2048/3379 cut-off events. [2024-06-20 17:08:20,863 INFO L125 PetriNetUnfolderBase]: For 135449/135449 co-relation queries the response was YES. [2024-06-20 17:08:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 3379 events. 2048/3379 cut-off events. For 135449/135449 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19467 event pairs, 639 based on Foata normal form. 8/3367 useless extension candidates. Maximal degree in co-relation 24982. Up to 2935 conditions per place. [2024-06-20 17:08:20,888 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 72 changer transitions 0/236 dead transitions. [2024-06-20 17:08:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 236 transitions, 3376 flow [2024-06-20 17:08:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:08:20,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-20 17:08:20,889 INFO L175 Difference]: Start difference. First operand has 157 places, 212 transitions, 2761 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:08:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 236 transitions, 3376 flow [2024-06-20 17:08:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 3211 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:21,006 INFO L231 Difference]: Finished difference. Result has 159 places, 214 transitions, 2794 flow [2024-06-20 17:08:21,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=159, PETRI_TRANSITIONS=214} [2024-06-20 17:08:21,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-20 17:08:21,007 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 214 transitions, 2794 flow [2024-06-20 17:08:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:21,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:21,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:08:21,008 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:21,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1869206670, now seen corresponding path program 1 times [2024-06-20 17:08:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:21,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035425022] [2024-06-20 17:08:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035425022] [2024-06-20 17:08:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035425022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:24,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307216127] [2024-06-20 17:08:24,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:24,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 214 transitions, 2794 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-20 17:08:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:25,366 INFO L124 PetriNetUnfolderBase]: 2110/3484 cut-off events. [2024-06-20 17:08:25,367 INFO L125 PetriNetUnfolderBase]: For 145629/145629 co-relation queries the response was YES. [2024-06-20 17:08:25,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26225 conditions, 3484 events. 2110/3484 cut-off events. For 145629/145629 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 20184 event pairs, 635 based on Foata normal form. 6/3480 useless extension candidates. Maximal degree in co-relation 26152. Up to 3118 conditions per place. [2024-06-20 17:08:25,393 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 203 selfloop transitions, 55 changer transitions 0/263 dead transitions. [2024-06-20 17:08:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 263 transitions, 3818 flow [2024-06-20 17:08:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:08:25,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-20 17:08:25,395 INFO L175 Difference]: Start difference. First operand has 159 places, 214 transitions, 2794 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:08:25,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 263 transitions, 3818 flow [2024-06-20 17:08:25,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 263 transitions, 3617 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:25,535 INFO L231 Difference]: Finished difference. Result has 163 places, 239 transitions, 3093 flow [2024-06-20 17:08:25,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=163, PETRI_TRANSITIONS=239} [2024-06-20 17:08:25,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-20 17:08:25,536 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 239 transitions, 3093 flow [2024-06-20 17:08:25,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-20 17:08:25,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:25,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:08:25,536 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:25,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1869206825, now seen corresponding path program 1 times [2024-06-20 17:08:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:25,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256597683] [2024-06-20 17:08:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256597683] [2024-06-20 17:08:28,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256597683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:28,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:28,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706387758] [2024-06-20 17:08:28,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:28,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:28,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:28,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 239 transitions, 3093 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:28,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:28,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:29,404 INFO L124 PetriNetUnfolderBase]: 2107/3477 cut-off events. [2024-06-20 17:08:29,405 INFO L125 PetriNetUnfolderBase]: For 151718/151718 co-relation queries the response was YES. [2024-06-20 17:08:29,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27097 conditions, 3477 events. 2107/3477 cut-off events. For 151718/151718 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20117 event pairs, 677 based on Foata normal form. 1/3475 useless extension candidates. Maximal degree in co-relation 27022. Up to 3309 conditions per place. [2024-06-20 17:08:29,438 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 236 selfloop transitions, 17 changer transitions 0/258 dead transitions. [2024-06-20 17:08:29,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 258 transitions, 3695 flow [2024-06-20 17:08:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:08:29,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-20 17:08:29,439 INFO L175 Difference]: Start difference. First operand has 163 places, 239 transitions, 3093 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:08:29,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 258 transitions, 3695 flow [2024-06-20 17:08:29,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3567 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 17:08:29,596 INFO L231 Difference]: Finished difference. Result has 168 places, 242 transitions, 3057 flow [2024-06-20 17:08:29,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3057, PETRI_PLACES=168, PETRI_TRANSITIONS=242} [2024-06-20 17:08:29,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-20 17:08:29,597 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 242 transitions, 3057 flow [2024-06-20 17:08:29,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:29,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:08:29,598 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:29,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1869201090, now seen corresponding path program 2 times [2024-06-20 17:08:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:29,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884088837] [2024-06-20 17:08:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:31,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:31,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884088837] [2024-06-20 17:08:31,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884088837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:31,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:31,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:31,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448593594] [2024-06-20 17:08:31,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:31,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:31,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:31,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 242 transitions, 3057 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:31,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:31,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:31,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:33,445 INFO L124 PetriNetUnfolderBase]: 2230/3666 cut-off events. [2024-06-20 17:08:33,445 INFO L125 PetriNetUnfolderBase]: For 166163/166163 co-relation queries the response was YES. [2024-06-20 17:08:33,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28747 conditions, 3666 events. 2230/3666 cut-off events. For 166163/166163 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21338 event pairs, 635 based on Foata normal form. 8/3664 useless extension candidates. Maximal degree in co-relation 28670. Up to 3229 conditions per place. [2024-06-20 17:08:33,476 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 216 selfloop transitions, 85 changer transitions 0/306 dead transitions. [2024-06-20 17:08:33,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 306 transitions, 4467 flow [2024-06-20 17:08:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:08:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:08:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:08:33,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-20 17:08:33,477 INFO L175 Difference]: Start difference. First operand has 168 places, 242 transitions, 3057 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:08:33,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 306 transitions, 4467 flow [2024-06-20 17:08:33,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 306 transitions, 4393 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:33,669 INFO L231 Difference]: Finished difference. Result has 175 places, 278 transitions, 3710 flow [2024-06-20 17:08:33,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3710, PETRI_PLACES=175, PETRI_TRANSITIONS=278} [2024-06-20 17:08:33,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-20 17:08:33,670 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 278 transitions, 3710 flow [2024-06-20 17:08:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:08:33,670 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:33,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2130110715, now seen corresponding path program 1 times [2024-06-20 17:08:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319863816] [2024-06-20 17:08:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:35,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:35,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319863816] [2024-06-20 17:08:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319863816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:35,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:35,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230768850] [2024-06-20 17:08:35,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:35,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:35,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:35,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 278 transitions, 3710 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:37,893 INFO L124 PetriNetUnfolderBase]: 2312/3809 cut-off events. [2024-06-20 17:08:37,893 INFO L125 PetriNetUnfolderBase]: For 182101/182101 co-relation queries the response was YES. [2024-06-20 17:08:37,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31210 conditions, 3809 events. 2312/3809 cut-off events. For 182101/182101 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22389 event pairs, 328 based on Foata normal form. 3/3809 useless extension candidates. Maximal degree in co-relation 31129. Up to 2814 conditions per place. [2024-06-20 17:08:37,925 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 209 selfloop transitions, 130 changer transitions 0/344 dead transitions. [2024-06-20 17:08:37,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 344 transitions, 5009 flow [2024-06-20 17:08:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:08:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:08:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-20 17:08:37,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-20 17:08:37,928 INFO L175 Difference]: Start difference. First operand has 175 places, 278 transitions, 3710 flow. Second operand 11 states and 190 transitions. [2024-06-20 17:08:37,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 344 transitions, 5009 flow [2024-06-20 17:08:38,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 344 transitions, 4851 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-20 17:08:38,135 INFO L231 Difference]: Finished difference. Result has 185 places, 302 transitions, 4310 flow [2024-06-20 17:08:38,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4310, PETRI_PLACES=185, PETRI_TRANSITIONS=302} [2024-06-20 17:08:38,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-20 17:08:38,136 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 302 transitions, 4310 flow [2024-06-20 17:08:38,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:38,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:38,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:38,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:08:38,136 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:38,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1800070771, now seen corresponding path program 2 times [2024-06-20 17:08:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015763053] [2024-06-20 17:08:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015763053] [2024-06-20 17:08:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015763053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:40,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615513836] [2024-06-20 17:08:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:40,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:40,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 302 transitions, 4310 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:40,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:40,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:40,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:42,271 INFO L124 PetriNetUnfolderBase]: 2336/3836 cut-off events. [2024-06-20 17:08:42,271 INFO L125 PetriNetUnfolderBase]: For 199902/199902 co-relation queries the response was YES. [2024-06-20 17:08:42,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33368 conditions, 3836 events. 2336/3836 cut-off events. For 199902/199902 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22535 event pairs, 642 based on Foata normal form. 2/3828 useless extension candidates. Maximal degree in co-relation 33283. Up to 3537 conditions per place. [2024-06-20 17:08:42,303 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 291 selfloop transitions, 38 changer transitions 0/334 dead transitions. [2024-06-20 17:08:42,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 334 transitions, 5288 flow [2024-06-20 17:08:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:08:42,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:08:42,305 INFO L175 Difference]: Start difference. First operand has 185 places, 302 transitions, 4310 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:08:42,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 334 transitions, 5288 flow [2024-06-20 17:08:42,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 334 transitions, 5163 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 17:08:42,505 INFO L231 Difference]: Finished difference. Result has 186 places, 312 transitions, 4485 flow [2024-06-20 17:08:42,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=186, PETRI_TRANSITIONS=312} [2024-06-20 17:08:42,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-20 17:08:42,506 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 312 transitions, 4485 flow [2024-06-20 17:08:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:42,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:42,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:08:42,506 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:42,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2111111565, now seen corresponding path program 3 times [2024-06-20 17:08:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:42,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476145547] [2024-06-20 17:08:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476145547] [2024-06-20 17:08:45,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476145547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:45,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:45,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:45,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821894112] [2024-06-20 17:08:45,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:45,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:45,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 312 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:45,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:45,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:45,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:46,516 INFO L124 PetriNetUnfolderBase]: 2335/3833 cut-off events. [2024-06-20 17:08:46,516 INFO L125 PetriNetUnfolderBase]: For 210076/210076 co-relation queries the response was YES. [2024-06-20 17:08:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33794 conditions, 3833 events. 2335/3833 cut-off events. For 210076/210076 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22521 event pairs, 642 based on Foata normal form. 3/3826 useless extension candidates. Maximal degree in co-relation 33708. Up to 3522 conditions per place. [2024-06-20 17:08:46,555 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 282 selfloop transitions, 44 changer transitions 0/331 dead transitions. [2024-06-20 17:08:46,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 331 transitions, 5222 flow [2024-06-20 17:08:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:08:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-20 17:08:46,557 INFO L175 Difference]: Start difference. First operand has 186 places, 312 transitions, 4485 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:08:46,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 331 transitions, 5222 flow [2024-06-20 17:08:46,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 331 transitions, 5108 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 17:08:46,787 INFO L231 Difference]: Finished difference. Result has 189 places, 315 transitions, 4509 flow [2024-06-20 17:08:46,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4509, PETRI_PLACES=189, PETRI_TRANSITIONS=315} [2024-06-20 17:08:46,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-20 17:08:46,788 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 315 transitions, 4509 flow [2024-06-20 17:08:46,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:46,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:46,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:08:46,789 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1274566673, now seen corresponding path program 4 times [2024-06-20 17:08:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:46,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773527391] [2024-06-20 17:08:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773527391] [2024-06-20 17:08:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773527391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:49,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:49,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434485043] [2024-06-20 17:08:49,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:49,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 315 transitions, 4509 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:50,794 INFO L124 PetriNetUnfolderBase]: 2385/3911 cut-off events. [2024-06-20 17:08:50,794 INFO L125 PetriNetUnfolderBase]: For 226233/226233 co-relation queries the response was YES. [2024-06-20 17:08:50,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34714 conditions, 3911 events. 2385/3911 cut-off events. For 226233/226233 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22967 event pairs, 451 based on Foata normal form. 8/3909 useless extension candidates. Maximal degree in co-relation 34627. Up to 2504 conditions per place. [2024-06-20 17:08:50,834 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 187 selfloop transitions, 175 changer transitions 0/367 dead transitions. [2024-06-20 17:08:50,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 367 transitions, 5936 flow [2024-06-20 17:08:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:08:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:08:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:08:50,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-20 17:08:50,836 INFO L175 Difference]: Start difference. First operand has 189 places, 315 transitions, 4509 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:08:50,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 367 transitions, 5936 flow [2024-06-20 17:08:51,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 367 transitions, 5792 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:51,119 INFO L231 Difference]: Finished difference. Result has 191 places, 335 transitions, 5233 flow [2024-06-20 17:08:51,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5233, PETRI_PLACES=191, PETRI_TRANSITIONS=335} [2024-06-20 17:08:51,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-20 17:08:51,119 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 335 transitions, 5233 flow [2024-06-20 17:08:51,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:51,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:08:51,120 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:51,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 830244105, now seen corresponding path program 1 times [2024-06-20 17:08:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754527776] [2024-06-20 17:08:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754527776] [2024-06-20 17:08:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754527776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837967783] [2024-06-20 17:08:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:53,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:53,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:53,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 335 transitions, 5233 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:53,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:53,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:53,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:55,409 INFO L124 PetriNetUnfolderBase]: 2437/3990 cut-off events. [2024-06-20 17:08:55,409 INFO L125 PetriNetUnfolderBase]: For 255986/255986 co-relation queries the response was YES. [2024-06-20 17:08:55,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37583 conditions, 3990 events. 2437/3990 cut-off events. For 255986/255986 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23477 event pairs, 632 based on Foata normal form. 14/3984 useless extension candidates. Maximal degree in co-relation 37495. Up to 3603 conditions per place. [2024-06-20 17:08:55,448 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 303 selfloop transitions, 48 changer transitions 0/356 dead transitions. [2024-06-20 17:08:55,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 356 transitions, 6131 flow [2024-06-20 17:08:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:08:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:08:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:08:55,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-20 17:08:55,450 INFO L175 Difference]: Start difference. First operand has 191 places, 335 transitions, 5233 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:08:55,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 356 transitions, 6131 flow [2024-06-20 17:08:55,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 356 transitions, 6027 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 17:08:55,750 INFO L231 Difference]: Finished difference. Result has 195 places, 337 transitions, 5290 flow [2024-06-20 17:08:55,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5290, PETRI_PLACES=195, PETRI_TRANSITIONS=337} [2024-06-20 17:08:55,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-20 17:08:55,751 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 337 transitions, 5290 flow [2024-06-20 17:08:55,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:55,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:55,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:08:55,752 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:08:55,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 845481225, now seen corresponding path program 2 times [2024-06-20 17:08:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:55,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886861002] [2024-06-20 17:08:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:58,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886861002] [2024-06-20 17:08:58,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886861002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:58,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:58,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:08:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448062101] [2024-06-20 17:08:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:58,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:08:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:08:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:08:58,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:08:58,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 337 transitions, 5290 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:58,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:58,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:08:58,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:00,021 INFO L124 PetriNetUnfolderBase]: 2498/4085 cut-off events. [2024-06-20 17:09:00,021 INFO L125 PetriNetUnfolderBase]: For 269548/269548 co-relation queries the response was YES. [2024-06-20 17:09:00,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38943 conditions, 4085 events. 2498/4085 cut-off events. For 269548/269548 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24066 event pairs, 631 based on Foata normal form. 8/4073 useless extension candidates. Maximal degree in co-relation 38853. Up to 3543 conditions per place. [2024-06-20 17:09:00,062 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 311 selfloop transitions, 47 changer transitions 0/363 dead transitions. [2024-06-20 17:09:00,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 363 transitions, 6356 flow [2024-06-20 17:09:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:09:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:09:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:09:00,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-20 17:09:00,064 INFO L175 Difference]: Start difference. First operand has 195 places, 337 transitions, 5290 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:09:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 363 transitions, 6356 flow [2024-06-20 17:09:00,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 363 transitions, 6239 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:00,380 INFO L231 Difference]: Finished difference. Result has 197 places, 339 transitions, 5333 flow [2024-06-20 17:09:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=197, PETRI_TRANSITIONS=339} [2024-06-20 17:09:00,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-20 17:09:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 339 transitions, 5333 flow [2024-06-20 17:09:00,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:00,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:00,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:09:00,381 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:00,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1554758651, now seen corresponding path program 1 times [2024-06-20 17:09:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:00,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162668452] [2024-06-20 17:09:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162668452] [2024-06-20 17:09:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162668452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:03,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386493956] [2024-06-20 17:09:03,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:03,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:03,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 339 transitions, 5333 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:03,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:03,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:04,912 INFO L124 PetriNetUnfolderBase]: 2572/4208 cut-off events. [2024-06-20 17:09:04,912 INFO L125 PetriNetUnfolderBase]: For 283856/283856 co-relation queries the response was YES. [2024-06-20 17:09:04,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40252 conditions, 4208 events. 2572/4208 cut-off events. For 283856/283856 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24859 event pairs, 447 based on Foata normal form. 6/4204 useless extension candidates. Maximal degree in co-relation 40161. Up to 2942 conditions per place. [2024-06-20 17:09:04,959 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 198 selfloop transitions, 184 changer transitions 0/387 dead transitions. [2024-06-20 17:09:04,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 387 transitions, 6701 flow [2024-06-20 17:09:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:09:04,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-20 17:09:04,960 INFO L175 Difference]: Start difference. First operand has 197 places, 339 transitions, 5333 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:09:04,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 387 transitions, 6701 flow [2024-06-20 17:09:05,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 387 transitions, 6638 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:05,353 INFO L231 Difference]: Finished difference. Result has 206 places, 359 transitions, 6228 flow [2024-06-20 17:09:05,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6228, PETRI_PLACES=206, PETRI_TRANSITIONS=359} [2024-06-20 17:09:05,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-20 17:09:05,353 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 359 transitions, 6228 flow [2024-06-20 17:09:05,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:05,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:05,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:09:05,354 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:05,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1554751707, now seen corresponding path program 1 times [2024-06-20 17:09:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757030877] [2024-06-20 17:09:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:10,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757030877] [2024-06-20 17:09:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757030877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:10,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:10,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798049511] [2024-06-20 17:09:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:10,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:10,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 359 transitions, 6228 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:10,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:10,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:10,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:12,075 INFO L124 PetriNetUnfolderBase]: 2618/4285 cut-off events. [2024-06-20 17:09:12,076 INFO L125 PetriNetUnfolderBase]: For 320675/320675 co-relation queries the response was YES. [2024-06-20 17:09:12,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43400 conditions, 4285 events. 2618/4285 cut-off events. For 320675/320675 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25536 event pairs, 647 based on Foata normal form. 32/4297 useless extension candidates. Maximal degree in co-relation 43304. Up to 3602 conditions per place. [2024-06-20 17:09:12,128 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 301 selfloop transitions, 86 changer transitions 0/392 dead transitions. [2024-06-20 17:09:12,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 392 transitions, 7365 flow [2024-06-20 17:09:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:09:12,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-20 17:09:12,131 INFO L175 Difference]: Start difference. First operand has 206 places, 359 transitions, 6228 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:09:12,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 392 transitions, 7365 flow [2024-06-20 17:09:12,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 392 transitions, 7231 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:12,529 INFO L231 Difference]: Finished difference. Result has 212 places, 362 transitions, 6407 flow [2024-06-20 17:09:12,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6407, PETRI_PLACES=212, PETRI_TRANSITIONS=362} [2024-06-20 17:09:12,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-20 17:09:12,530 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 362 transitions, 6407 flow [2024-06-20 17:09:12,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:12,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:12,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:09:12,531 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:12,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1440439299, now seen corresponding path program 1 times [2024-06-20 17:09:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:12,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737496859] [2024-06-20 17:09:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737496859] [2024-06-20 17:09:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737496859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:16,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777841555] [2024-06-20 17:09:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:16,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:16,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 362 transitions, 6407 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:16,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:16,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:16,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:17,945 INFO L124 PetriNetUnfolderBase]: 2959/4804 cut-off events. [2024-06-20 17:09:17,945 INFO L125 PetriNetUnfolderBase]: For 387460/387460 co-relation queries the response was YES. [2024-06-20 17:09:17,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50849 conditions, 4804 events. 2959/4804 cut-off events. For 387460/387460 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28803 event pairs, 539 based on Foata normal form. 16/4800 useless extension candidates. Maximal degree in co-relation 50750. Up to 2855 conditions per place. [2024-06-20 17:09:17,995 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 211 selfloop transitions, 229 changer transitions 0/445 dead transitions. [2024-06-20 17:09:17,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 445 transitions, 8627 flow [2024-06-20 17:09:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 17:09:17,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 17:09:17,997 INFO L175 Difference]: Start difference. First operand has 212 places, 362 transitions, 6407 flow. Second operand 9 states and 181 transitions. [2024-06-20 17:09:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 445 transitions, 8627 flow [2024-06-20 17:09:18,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 445 transitions, 8446 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 17:09:18,486 INFO L231 Difference]: Finished difference. Result has 220 places, 398 transitions, 7727 flow [2024-06-20 17:09:18,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6226, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7727, PETRI_PLACES=220, PETRI_TRANSITIONS=398} [2024-06-20 17:09:18,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-20 17:09:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 398 transitions, 7727 flow [2024-06-20 17:09:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:18,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:18,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:18,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:09:18,488 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:18,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1440618975, now seen corresponding path program 2 times [2024-06-20 17:09:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781347662] [2024-06-20 17:09:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:21,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781347662] [2024-06-20 17:09:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781347662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:21,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:21,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856752799] [2024-06-20 17:09:21,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:21,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:21,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 398 transitions, 7727 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:21,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:21,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:21,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:23,665 INFO L124 PetriNetUnfolderBase]: 3015/4903 cut-off events. [2024-06-20 17:09:23,666 INFO L125 PetriNetUnfolderBase]: For 416657/416657 co-relation queries the response was YES. [2024-06-20 17:09:23,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54778 conditions, 4903 events. 3015/4903 cut-off events. For 416657/416657 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29569 event pairs, 765 based on Foata normal form. 6/4899 useless extension candidates. Maximal degree in co-relation 54674. Up to 4275 conditions per place. [2024-06-20 17:09:23,817 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 315 selfloop transitions, 110 changer transitions 0/430 dead transitions. [2024-06-20 17:09:23,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 430 transitions, 9013 flow [2024-06-20 17:09:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:09:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-20 17:09:23,827 INFO L175 Difference]: Start difference. First operand has 220 places, 398 transitions, 7727 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:09:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 430 transitions, 9013 flow [2024-06-20 17:09:24,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 430 transitions, 8812 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 17:09:24,302 INFO L231 Difference]: Finished difference. Result has 226 places, 406 transitions, 8029 flow [2024-06-20 17:09:24,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7526, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8029, PETRI_PLACES=226, PETRI_TRANSITIONS=406} [2024-06-20 17:09:24,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-20 17:09:24,303 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 406 transitions, 8029 flow [2024-06-20 17:09:24,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:24,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:24,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:24,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:09:24,303 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:24,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1440623625, now seen corresponding path program 3 times [2024-06-20 17:09:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383760906] [2024-06-20 17:09:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:24,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:27,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383760906] [2024-06-20 17:09:27,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383760906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:27,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:27,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930020926] [2024-06-20 17:09:27,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:27,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:27,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 406 transitions, 8029 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:27,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:27,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:27,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:29,298 INFO L124 PetriNetUnfolderBase]: 3238/5225 cut-off events. [2024-06-20 17:09:29,299 INFO L125 PetriNetUnfolderBase]: For 472147/472147 co-relation queries the response was YES. [2024-06-20 17:09:29,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59658 conditions, 5225 events. 3238/5225 cut-off events. For 472147/472147 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31513 event pairs, 710 based on Foata normal form. 6/5211 useless extension candidates. Maximal degree in co-relation 59552. Up to 3724 conditions per place. [2024-06-20 17:09:29,363 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 297 selfloop transitions, 188 changer transitions 0/490 dead transitions. [2024-06-20 17:09:29,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 490 transitions, 10626 flow [2024-06-20 17:09:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:09:29,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 17:09:29,365 INFO L175 Difference]: Start difference. First operand has 226 places, 406 transitions, 8029 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:09:29,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 490 transitions, 10626 flow [2024-06-20 17:09:30,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 490 transitions, 10358 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:30,119 INFO L231 Difference]: Finished difference. Result has 233 places, 443 transitions, 9313 flow [2024-06-20 17:09:30,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9313, PETRI_PLACES=233, PETRI_TRANSITIONS=443} [2024-06-20 17:09:30,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-20 17:09:30,120 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 443 transitions, 9313 flow [2024-06-20 17:09:30,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:30,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:30,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:09:30,121 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:30,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1440623749, now seen corresponding path program 1 times [2024-06-20 17:09:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369701382] [2024-06-20 17:09:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:30,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:33,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369701382] [2024-06-20 17:09:33,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369701382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:33,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368703373] [2024-06-20 17:09:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:33,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:33,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 443 transitions, 9313 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:35,493 INFO L124 PetriNetUnfolderBase]: 3233/5236 cut-off events. [2024-06-20 17:09:35,493 INFO L125 PetriNetUnfolderBase]: For 489616/489616 co-relation queries the response was YES. [2024-06-20 17:09:35,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61865 conditions, 5236 events. 3233/5236 cut-off events. For 489616/489616 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31692 event pairs, 528 based on Foata normal form. 2/5235 useless extension candidates. Maximal degree in co-relation 61755. Up to 4173 conditions per place. [2024-06-20 17:09:35,554 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 325 selfloop transitions, 140 changer transitions 0/470 dead transitions. [2024-06-20 17:09:35,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 470 transitions, 10481 flow [2024-06-20 17:09:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:09:35,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-20 17:09:35,556 INFO L175 Difference]: Start difference. First operand has 233 places, 443 transitions, 9313 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:09:35,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 470 transitions, 10481 flow [2024-06-20 17:09:36,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 470 transitions, 10210 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-20 17:09:36,271 INFO L231 Difference]: Finished difference. Result has 239 places, 445 transitions, 9401 flow [2024-06-20 17:09:36,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9042, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9401, PETRI_PLACES=239, PETRI_TRANSITIONS=445} [2024-06-20 17:09:36,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-20 17:09:36,272 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 445 transitions, 9401 flow [2024-06-20 17:09:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:36,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:36,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:36,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:09:36,273 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:36,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash -920587979, now seen corresponding path program 2 times [2024-06-20 17:09:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544924488] [2024-06-20 17:09:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:36,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544924488] [2024-06-20 17:09:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544924488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:39,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485977644] [2024-06-20 17:09:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:39,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:39,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:39,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 445 transitions, 9401 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:39,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:39,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:39,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:41,608 INFO L124 PetriNetUnfolderBase]: 3310/5370 cut-off events. [2024-06-20 17:09:41,609 INFO L125 PetriNetUnfolderBase]: For 540600/540600 co-relation queries the response was YES. [2024-06-20 17:09:41,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63535 conditions, 5370 events. 3310/5370 cut-off events. For 540600/540600 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32832 event pairs, 762 based on Foata normal form. 30/5380 useless extension candidates. Maximal degree in co-relation 63423. Up to 4813 conditions per place. [2024-06-20 17:09:41,677 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 412 selfloop transitions, 52 changer transitions 7/476 dead transitions. [2024-06-20 17:09:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 476 transitions, 10840 flow [2024-06-20 17:09:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:09:41,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-20 17:09:41,678 INFO L175 Difference]: Start difference. First operand has 239 places, 445 transitions, 9401 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:09:41,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 476 transitions, 10840 flow [2024-06-20 17:09:42,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 476 transitions, 10756 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:42,477 INFO L231 Difference]: Finished difference. Result has 243 places, 449 transitions, 9570 flow [2024-06-20 17:09:42,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9317, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9570, PETRI_PLACES=243, PETRI_TRANSITIONS=449} [2024-06-20 17:09:42,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-20 17:09:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 449 transitions, 9570 flow [2024-06-20 17:09:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:42,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:42,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:09:42,480 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:42,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 615272249, now seen corresponding path program 3 times [2024-06-20 17:09:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560266238] [2024-06-20 17:09:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560266238] [2024-06-20 17:09:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560266238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:45,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116994044] [2024-06-20 17:09:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:45,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:45,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:45,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 449 transitions, 9570 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:45,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:45,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:45,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:47,681 INFO L124 PetriNetUnfolderBase]: 3364/5464 cut-off events. [2024-06-20 17:09:47,682 INFO L125 PetriNetUnfolderBase]: For 559946/559946 co-relation queries the response was YES. [2024-06-20 17:09:47,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65284 conditions, 5464 events. 3364/5464 cut-off events. For 559946/559946 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33567 event pairs, 803 based on Foata normal form. 20/5464 useless extension candidates. Maximal degree in co-relation 65169. Up to 4989 conditions per place. [2024-06-20 17:09:47,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 51 changer transitions 0/480 dead transitions. [2024-06-20 17:09:47,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 480 transitions, 11075 flow [2024-06-20 17:09:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:09:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:09:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:09:47,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-20 17:09:47,752 INFO L175 Difference]: Start difference. First operand has 243 places, 449 transitions, 9570 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:09:47,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 480 transitions, 11075 flow [2024-06-20 17:09:48,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 480 transitions, 10934 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:48,607 INFO L231 Difference]: Finished difference. Result has 246 places, 453 transitions, 9712 flow [2024-06-20 17:09:48,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9429, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9712, PETRI_PLACES=246, PETRI_TRANSITIONS=453} [2024-06-20 17:09:48,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-20 17:09:48,607 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 453 transitions, 9712 flow [2024-06-20 17:09:48,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:48,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:48,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:48,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:09:48,608 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:48,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1047769207, now seen corresponding path program 4 times [2024-06-20 17:09:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:48,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371029501] [2024-06-20 17:09:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:48,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371029501] [2024-06-20 17:09:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371029501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:51,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:51,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:51,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631932781] [2024-06-20 17:09:51,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:51,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:51,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:51,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 453 transitions, 9712 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:51,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:51,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:51,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:54,158 INFO L124 PetriNetUnfolderBase]: 3384/5521 cut-off events. [2024-06-20 17:09:54,158 INFO L125 PetriNetUnfolderBase]: For 580393/580393 co-relation queries the response was YES. [2024-06-20 17:09:54,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65861 conditions, 5521 events. 3384/5521 cut-off events. For 580393/580393 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34262 event pairs, 605 based on Foata normal form. 52/5553 useless extension candidates. Maximal degree in co-relation 65745. Up to 3837 conditions per place. [2024-06-20 17:09:54,230 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 287 selfloop transitions, 185 changer transitions 19/496 dead transitions. [2024-06-20 17:09:54,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 496 transitions, 11424 flow [2024-06-20 17:09:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:09:54,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-20 17:09:54,232 INFO L175 Difference]: Start difference. First operand has 246 places, 453 transitions, 9712 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:09:54,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 496 transitions, 11424 flow [2024-06-20 17:09:55,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 496 transitions, 11287 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:55,143 INFO L231 Difference]: Finished difference. Result has 251 places, 452 transitions, 10198 flow [2024-06-20 17:09:55,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9575, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10198, PETRI_PLACES=251, PETRI_TRANSITIONS=452} [2024-06-20 17:09:55,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-20 17:09:55,143 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 452 transitions, 10198 flow [2024-06-20 17:09:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:55,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:55,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:55,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:09:55,144 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:09:55,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1382625823, now seen corresponding path program 5 times [2024-06-20 17:09:55,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:55,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726861239] [2024-06-20 17:09:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:55,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:58,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726861239] [2024-06-20 17:09:58,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726861239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:58,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989065980] [2024-06-20 17:09:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:58,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:09:58,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 452 transitions, 10198 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:58,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:58,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:09:58,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:00,583 INFO L124 PetriNetUnfolderBase]: 3346/5456 cut-off events. [2024-06-20 17:10:00,583 INFO L125 PetriNetUnfolderBase]: For 601321/601321 co-relation queries the response was YES. [2024-06-20 17:10:00,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67004 conditions, 5456 events. 3346/5456 cut-off events. For 601321/601321 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33788 event pairs, 806 based on Foata normal form. 20/5456 useless extension candidates. Maximal degree in co-relation 66887. Up to 4878 conditions per place. [2024-06-20 17:10:00,662 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 58 changer transitions 6/483 dead transitions. [2024-06-20 17:10:00,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 483 transitions, 11680 flow [2024-06-20 17:10:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:10:00,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:10:00,663 INFO L175 Difference]: Start difference. First operand has 251 places, 452 transitions, 10198 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:10:00,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 483 transitions, 11680 flow [2024-06-20 17:10:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 483 transitions, 11568 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:01,578 INFO L231 Difference]: Finished difference. Result has 254 places, 450 transitions, 10213 flow [2024-06-20 17:10:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10213, PETRI_PLACES=254, PETRI_TRANSITIONS=450} [2024-06-20 17:10:01,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-20 17:10:01,579 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 450 transitions, 10213 flow [2024-06-20 17:10:01,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:01,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:01,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:10:01,579 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:01,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1168815336, now seen corresponding path program 1 times [2024-06-20 17:10:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:01,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752077516] [2024-06-20 17:10:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:05,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:05,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752077516] [2024-06-20 17:10:05,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752077516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:05,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:05,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:05,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858144770] [2024-06-20 17:10:05,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:05,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:05,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 450 transitions, 10213 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:07,538 INFO L124 PetriNetUnfolderBase]: 3337/5453 cut-off events. [2024-06-20 17:10:07,539 INFO L125 PetriNetUnfolderBase]: For 595273/595273 co-relation queries the response was YES. [2024-06-20 17:10:07,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67449 conditions, 5453 events. 3337/5453 cut-off events. For 595273/595273 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33760 event pairs, 803 based on Foata normal form. 1/5451 useless extension candidates. Maximal degree in co-relation 67330. Up to 4962 conditions per place. [2024-06-20 17:10:07,603 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 421 selfloop transitions, 56 changer transitions 0/482 dead transitions. [2024-06-20 17:10:07,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 482 transitions, 11520 flow [2024-06-20 17:10:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:10:07,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-20 17:10:07,605 INFO L175 Difference]: Start difference. First operand has 254 places, 450 transitions, 10213 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:10:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 482 transitions, 11520 flow [2024-06-20 17:10:08,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 482 transitions, 11394 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:08,562 INFO L231 Difference]: Finished difference. Result has 257 places, 453 transitions, 10336 flow [2024-06-20 17:10:08,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10087, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10336, PETRI_PLACES=257, PETRI_TRANSITIONS=453} [2024-06-20 17:10:08,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-20 17:10:08,564 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 453 transitions, 10336 flow [2024-06-20 17:10:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:08,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:08,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:10:08,564 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:08,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash -608662940, now seen corresponding path program 1 times [2024-06-20 17:10:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:08,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501516248] [2024-06-20 17:10:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501516248] [2024-06-20 17:10:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501516248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:11,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:11,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941812818] [2024-06-20 17:10:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:11,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:11,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 453 transitions, 10336 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:11,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:11,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:14,233 INFO L124 PetriNetUnfolderBase]: 3352/5510 cut-off events. [2024-06-20 17:10:14,233 INFO L125 PetriNetUnfolderBase]: For 616684/616684 co-relation queries the response was YES. [2024-06-20 17:10:14,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68166 conditions, 5510 events. 3352/5510 cut-off events. For 616684/616684 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34382 event pairs, 578 based on Foata normal form. 2/5509 useless extension candidates. Maximal degree in co-relation 68046. Up to 4796 conditions per place. [2024-06-20 17:10:14,303 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 75 changer transitions 0/504 dead transitions. [2024-06-20 17:10:14,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 504 transitions, 12042 flow [2024-06-20 17:10:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 17:10:14,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 17:10:14,304 INFO L175 Difference]: Start difference. First operand has 257 places, 453 transitions, 10336 flow. Second operand 8 states and 157 transitions. [2024-06-20 17:10:14,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 504 transitions, 12042 flow [2024-06-20 17:10:15,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 504 transitions, 11855 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:15,357 INFO L231 Difference]: Finished difference. Result has 262 places, 465 transitions, 10739 flow [2024-06-20 17:10:15,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10157, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10739, PETRI_PLACES=262, PETRI_TRANSITIONS=465} [2024-06-20 17:10:15,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-20 17:10:15,358 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 465 transitions, 10739 flow [2024-06-20 17:10:15,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:15,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:15,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:10:15,359 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:15,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2042576682, now seen corresponding path program 2 times [2024-06-20 17:10:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:15,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45912869] [2024-06-20 17:10:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45912869] [2024-06-20 17:10:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45912869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:18,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:18,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94428170] [2024-06-20 17:10:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:18,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:18,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 465 transitions, 10739 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:18,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:18,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:18,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:20,644 INFO L124 PetriNetUnfolderBase]: 3365/5523 cut-off events. [2024-06-20 17:10:20,644 INFO L125 PetriNetUnfolderBase]: For 639181/639181 co-relation queries the response was YES. [2024-06-20 17:10:20,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69315 conditions, 5523 events. 3365/5523 cut-off events. For 639181/639181 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34496 event pairs, 822 based on Foata normal form. 2/5522 useless extension candidates. Maximal degree in co-relation 69192. Up to 5099 conditions per place. [2024-06-20 17:10:20,722 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 60 changer transitions 0/499 dead transitions. [2024-06-20 17:10:20,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 499 transitions, 12002 flow [2024-06-20 17:10:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:10:20,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-20 17:10:20,724 INFO L175 Difference]: Start difference. First operand has 262 places, 465 transitions, 10739 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:10:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 499 transitions, 12002 flow [2024-06-20 17:10:21,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 499 transitions, 11863 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 17:10:21,803 INFO L231 Difference]: Finished difference. Result has 267 places, 470 transitions, 10878 flow [2024-06-20 17:10:21,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10614, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10878, PETRI_PLACES=267, PETRI_TRANSITIONS=470} [2024-06-20 17:10:21,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-20 17:10:21,804 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 470 transitions, 10878 flow [2024-06-20 17:10:21,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:21,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:21,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:21,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:10:21,805 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:21,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1755689352, now seen corresponding path program 3 times [2024-06-20 17:10:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:21,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074359499] [2024-06-20 17:10:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:21,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074359499] [2024-06-20 17:10:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074359499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:24,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559771078] [2024-06-20 17:10:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:24,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 470 transitions, 10878 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:24,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:24,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:26,697 INFO L124 PetriNetUnfolderBase]: 3360/5504 cut-off events. [2024-06-20 17:10:26,697 INFO L125 PetriNetUnfolderBase]: For 652300/652300 co-relation queries the response was YES. [2024-06-20 17:10:26,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69331 conditions, 5504 events. 3360/5504 cut-off events. For 652300/652300 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34249 event pairs, 804 based on Foata normal form. 2/5503 useless extension candidates. Maximal degree in co-relation 69207. Up to 5092 conditions per place. [2024-06-20 17:10:26,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 428 selfloop transitions, 59 changer transitions 0/492 dead transitions. [2024-06-20 17:10:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 492 transitions, 11957 flow [2024-06-20 17:10:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:10:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-20 17:10:26,770 INFO L175 Difference]: Start difference. First operand has 267 places, 470 transitions, 10878 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:10:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 492 transitions, 11957 flow [2024-06-20 17:10:27,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 492 transitions, 11796 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:27,939 INFO L231 Difference]: Finished difference. Result has 271 places, 471 transitions, 10872 flow [2024-06-20 17:10:27,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10719, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10872, PETRI_PLACES=271, PETRI_TRANSITIONS=471} [2024-06-20 17:10:27,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-20 17:10:27,940 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 471 transitions, 10872 flow [2024-06-20 17:10:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:27,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:27,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:27,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:10:27,940 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:27,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 50927006, now seen corresponding path program 1 times [2024-06-20 17:10:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565718231] [2024-06-20 17:10:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:30,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565718231] [2024-06-20 17:10:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565718231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:30,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214421323] [2024-06-20 17:10:30,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:30,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:30,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 471 transitions, 10872 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:30,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:30,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:30,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:33,051 INFO L124 PetriNetUnfolderBase]: 3370/5535 cut-off events. [2024-06-20 17:10:33,052 INFO L125 PetriNetUnfolderBase]: For 670225/670225 co-relation queries the response was YES. [2024-06-20 17:10:33,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69716 conditions, 5535 events. 3370/5535 cut-off events. For 670225/670225 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34578 event pairs, 842 based on Foata normal form. 2/5533 useless extension candidates. Maximal degree in co-relation 69590. Up to 5136 conditions per place. [2024-06-20 17:10:33,127 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 461 selfloop transitions, 40 changer transitions 0/506 dead transitions. [2024-06-20 17:10:33,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 506 transitions, 12180 flow [2024-06-20 17:10:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:10:33,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-20 17:10:33,135 INFO L175 Difference]: Start difference. First operand has 271 places, 471 transitions, 10872 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:10:33,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 506 transitions, 12180 flow [2024-06-20 17:10:34,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 506 transitions, 12037 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:34,439 INFO L231 Difference]: Finished difference. Result has 276 places, 476 transitions, 10941 flow [2024-06-20 17:10:34,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10729, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10941, PETRI_PLACES=276, PETRI_TRANSITIONS=476} [2024-06-20 17:10:34,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-20 17:10:34,440 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 476 transitions, 10941 flow [2024-06-20 17:10:34,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:34,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:34,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:34,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:10:34,441 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:34,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -412878784, now seen corresponding path program 2 times [2024-06-20 17:10:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515141317] [2024-06-20 17:10:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515141317] [2024-06-20 17:10:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515141317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:37,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:37,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514328050] [2024-06-20 17:10:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:37,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:37,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 476 transitions, 10941 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-20 17:10:37,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:37,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:37,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:40,278 INFO L124 PetriNetUnfolderBase]: 3375/5529 cut-off events. [2024-06-20 17:10:40,278 INFO L125 PetriNetUnfolderBase]: For 686945/686945 co-relation queries the response was YES. [2024-06-20 17:10:40,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70185 conditions, 5529 events. 3375/5529 cut-off events. For 686945/686945 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34499 event pairs, 824 based on Foata normal form. 1/5510 useless extension candidates. Maximal degree in co-relation 70057. Up to 4922 conditions per place. [2024-06-20 17:10:40,356 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 430 selfloop transitions, 70 changer transitions 0/505 dead transitions. [2024-06-20 17:10:40,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 505 transitions, 12277 flow [2024-06-20 17:10:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:10:40,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-20 17:10:40,366 INFO L175 Difference]: Start difference. First operand has 276 places, 476 transitions, 10941 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:10:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 505 transitions, 12277 flow [2024-06-20 17:10:41,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 505 transitions, 12152 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 17:10:41,481 INFO L231 Difference]: Finished difference. Result has 280 places, 479 transitions, 11099 flow [2024-06-20 17:10:41,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10816, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11099, PETRI_PLACES=280, PETRI_TRANSITIONS=479} [2024-06-20 17:10:41,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-20 17:10:41,482 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 479 transitions, 11099 flow [2024-06-20 17:10:41,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-20 17:10:41,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:41,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:10:41,482 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:41,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1019954058, now seen corresponding path program 3 times [2024-06-20 17:10:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:41,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165317187] [2024-06-20 17:10:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165317187] [2024-06-20 17:10:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165317187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:45,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:45,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:10:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172762242] [2024-06-20 17:10:45,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:10:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:10:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:10:45,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:45,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 479 transitions, 11099 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:45,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:45,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:45,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:47,733 INFO L124 PetriNetUnfolderBase]: 3382/5541 cut-off events. [2024-06-20 17:10:47,733 INFO L125 PetriNetUnfolderBase]: For 714860/714860 co-relation queries the response was YES. [2024-06-20 17:10:47,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70932 conditions, 5541 events. 3382/5541 cut-off events. For 714860/714860 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34661 event pairs, 818 based on Foata normal form. 3/5524 useless extension candidates. Maximal degree in co-relation 70803. Up to 4846 conditions per place. [2024-06-20 17:10:47,813 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 413 selfloop transitions, 91 changer transitions 0/509 dead transitions. [2024-06-20 17:10:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 509 transitions, 12699 flow [2024-06-20 17:10:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:10:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:10:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:10:47,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-20 17:10:47,815 INFO L175 Difference]: Start difference. First operand has 280 places, 479 transitions, 11099 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:10:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 509 transitions, 12699 flow [2024-06-20 17:10:49,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 509 transitions, 12474 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:49,185 INFO L231 Difference]: Finished difference. Result has 282 places, 486 transitions, 11378 flow [2024-06-20 17:10:49,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10874, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11378, PETRI_PLACES=282, PETRI_TRANSITIONS=486} [2024-06-20 17:10:49,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-20 17:10:49,188 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 486 transitions, 11378 flow [2024-06-20 17:10:49,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:49,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:49,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:10:49,188 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:49,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash 20600060, now seen corresponding path program 2 times [2024-06-20 17:10:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382038025] [2024-06-20 17:10:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382038025] [2024-06-20 17:10:51,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382038025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:51,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:51,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507201046] [2024-06-20 17:10:51,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:51,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:51,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:52,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:52,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 486 transitions, 11378 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:52,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:52,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:52,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:54,373 INFO L124 PetriNetUnfolderBase]: 3392/5562 cut-off events. [2024-06-20 17:10:54,373 INFO L125 PetriNetUnfolderBase]: For 738859/738859 co-relation queries the response was YES. [2024-06-20 17:10:54,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71771 conditions, 5562 events. 3392/5562 cut-off events. For 738859/738859 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34788 event pairs, 831 based on Foata normal form. 2/5554 useless extension candidates. Maximal degree in co-relation 71641. Up to 5155 conditions per place. [2024-06-20 17:10:54,452 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 473 selfloop transitions, 39 changer transitions 0/517 dead transitions. [2024-06-20 17:10:54,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 517 transitions, 12693 flow [2024-06-20 17:10:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:10:54,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:10:54,454 INFO L175 Difference]: Start difference. First operand has 282 places, 486 transitions, 11378 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:10:54,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 517 transitions, 12693 flow [2024-06-20 17:10:55,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 517 transitions, 12473 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-20 17:10:55,813 INFO L231 Difference]: Finished difference. Result has 288 places, 490 transitions, 11338 flow [2024-06-20 17:10:55,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11158, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11338, PETRI_PLACES=288, PETRI_TRANSITIONS=490} [2024-06-20 17:10:55,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-20 17:10:55,813 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 490 transitions, 11338 flow [2024-06-20 17:10:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:55,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:55,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:10:55,814 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:10:55,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash -966968068, now seen corresponding path program 3 times [2024-06-20 17:10:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915006611] [2024-06-20 17:10:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:58,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:58,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915006611] [2024-06-20 17:10:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915006611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:58,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:58,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904413604] [2024-06-20 17:10:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:58,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:10:58,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 490 transitions, 11338 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:58,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:58,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:10:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:00,798 INFO L124 PetriNetUnfolderBase]: 3414/5601 cut-off events. [2024-06-20 17:11:00,799 INFO L125 PetriNetUnfolderBase]: For 755917/755917 co-relation queries the response was YES. [2024-06-20 17:11:00,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72278 conditions, 5601 events. 3414/5601 cut-off events. For 755917/755917 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35054 event pairs, 834 based on Foata normal form. 4/5595 useless extension candidates. Maximal degree in co-relation 72146. Up to 5161 conditions per place. [2024-06-20 17:11:00,875 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 451 selfloop transitions, 60 changer transitions 0/516 dead transitions. [2024-06-20 17:11:00,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 516 transitions, 12703 flow [2024-06-20 17:11:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:11:00,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-20 17:11:00,877 INFO L175 Difference]: Start difference. First operand has 288 places, 490 transitions, 11338 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:11:00,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 516 transitions, 12703 flow [2024-06-20 17:11:02,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 516 transitions, 12578 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:02,114 INFO L231 Difference]: Finished difference. Result has 291 places, 497 transitions, 11516 flow [2024-06-20 17:11:02,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11516, PETRI_PLACES=291, PETRI_TRANSITIONS=497} [2024-06-20 17:11:02,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-20 17:11:02,115 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 497 transitions, 11516 flow [2024-06-20 17:11:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:02,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:02,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:11:02,115 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:02,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1011672904, now seen corresponding path program 4 times [2024-06-20 17:11:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:02,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331074377] [2024-06-20 17:11:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:05,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:05,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331074377] [2024-06-20 17:11:05,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331074377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:05,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:05,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010158152] [2024-06-20 17:11:05,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:05,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 497 transitions, 11516 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:05,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:05,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:05,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:07,590 INFO L124 PetriNetUnfolderBase]: 3442/5634 cut-off events. [2024-06-20 17:11:07,591 INFO L125 PetriNetUnfolderBase]: For 773690/773690 co-relation queries the response was YES. [2024-06-20 17:11:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73339 conditions, 5634 events. 3442/5634 cut-off events. For 773690/773690 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35159 event pairs, 599 based on Foata normal form. 3/5627 useless extension candidates. Maximal degree in co-relation 73206. Up to 3958 conditions per place. [2024-06-20 17:11:07,686 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 284 selfloop transitions, 246 changer transitions 0/535 dead transitions. [2024-06-20 17:11:07,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 535 transitions, 13075 flow [2024-06-20 17:11:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:11:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-20 17:11:07,688 INFO L175 Difference]: Start difference. First operand has 291 places, 497 transitions, 11516 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:11:07,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 535 transitions, 13075 flow [2024-06-20 17:11:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 535 transitions, 12858 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:09,213 INFO L231 Difference]: Finished difference. Result has 295 places, 508 transitions, 12238 flow [2024-06-20 17:11:09,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11299, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12238, PETRI_PLACES=295, PETRI_TRANSITIONS=508} [2024-06-20 17:11:09,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-20 17:11:09,214 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 508 transitions, 12238 flow [2024-06-20 17:11:09,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:09,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:09,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:09,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:11:09,215 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:09,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash -958397188, now seen corresponding path program 5 times [2024-06-20 17:11:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813912172] [2024-06-20 17:11:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:12,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813912172] [2024-06-20 17:11:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813912172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:12,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:12,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590712276] [2024-06-20 17:11:12,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:12,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:12,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 508 transitions, 12238 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:12,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:12,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:12,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:14,427 INFO L124 PetriNetUnfolderBase]: 3439/5634 cut-off events. [2024-06-20 17:11:14,427 INFO L125 PetriNetUnfolderBase]: For 816464/816464 co-relation queries the response was YES. [2024-06-20 17:11:14,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75209 conditions, 5634 events. 3439/5634 cut-off events. For 816464/816464 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35199 event pairs, 500 based on Foata normal form. 3/5627 useless extension candidates. Maximal degree in co-relation 75074. Up to 3827 conditions per place. [2024-06-20 17:11:14,508 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 269 selfloop transitions, 269 changer transitions 0/543 dead transitions. [2024-06-20 17:11:14,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 543 transitions, 13732 flow [2024-06-20 17:11:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:11:14,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-20 17:11:14,510 INFO L175 Difference]: Start difference. First operand has 295 places, 508 transitions, 12238 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:11:14,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 543 transitions, 13732 flow [2024-06-20 17:11:15,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 543 transitions, 13539 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:15,990 INFO L231 Difference]: Finished difference. Result has 300 places, 515 transitions, 12767 flow [2024-06-20 17:11:15,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12045, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12767, PETRI_PLACES=300, PETRI_TRANSITIONS=515} [2024-06-20 17:11:15,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-20 17:11:15,991 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 515 transitions, 12767 flow [2024-06-20 17:11:15,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:15,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:15,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:11:15,992 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:15,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1005849027, now seen corresponding path program 1 times [2024-06-20 17:11:15,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:15,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006622108] [2024-06-20 17:11:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:15,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:20,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006622108] [2024-06-20 17:11:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006622108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608658391] [2024-06-20 17:11:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:20,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:20,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 515 transitions, 12767 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:20,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:20,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:22,895 INFO L124 PetriNetUnfolderBase]: 3447/5649 cut-off events. [2024-06-20 17:11:22,895 INFO L125 PetriNetUnfolderBase]: For 860815/860815 co-relation queries the response was YES. [2024-06-20 17:11:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76583 conditions, 5649 events. 3447/5649 cut-off events. For 860815/860815 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35307 event pairs, 512 based on Foata normal form. 16/5655 useless extension candidates. Maximal degree in co-relation 76445. Up to 4132 conditions per place. [2024-06-20 17:11:22,973 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 318 selfloop transitions, 225 changer transitions 0/548 dead transitions. [2024-06-20 17:11:22,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 548 transitions, 14313 flow [2024-06-20 17:11:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:11:22,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-20 17:11:22,975 INFO L175 Difference]: Start difference. First operand has 300 places, 515 transitions, 12767 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:11:22,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 548 transitions, 14313 flow [2024-06-20 17:11:24,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 548 transitions, 13769 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:11:24,361 INFO L231 Difference]: Finished difference. Result has 304 places, 519 transitions, 12965 flow [2024-06-20 17:11:24,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12223, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12965, PETRI_PLACES=304, PETRI_TRANSITIONS=519} [2024-06-20 17:11:24,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-20 17:11:24,362 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 519 transitions, 12965 flow [2024-06-20 17:11:24,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:24,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:24,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:11:24,363 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:24,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash -952660731, now seen corresponding path program 2 times [2024-06-20 17:11:24,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:24,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115133331] [2024-06-20 17:11:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:28,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115133331] [2024-06-20 17:11:28,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115133331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:28,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:28,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:28,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984423014] [2024-06-20 17:11:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:28,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:28,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:28,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 519 transitions, 12965 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:30,905 INFO L124 PetriNetUnfolderBase]: 3756/6123 cut-off events. [2024-06-20 17:11:30,906 INFO L125 PetriNetUnfolderBase]: For 975635/975635 co-relation queries the response was YES. [2024-06-20 17:11:30,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83731 conditions, 6123 events. 3756/6123 cut-off events. For 975635/975635 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38472 event pairs, 567 based on Foata normal form. 30/6143 useless extension candidates. Maximal degree in co-relation 83591. Up to 3481 conditions per place. [2024-06-20 17:11:31,003 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 351 selfloop transitions, 249 changer transitions 0/605 dead transitions. [2024-06-20 17:11:31,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 605 transitions, 16076 flow [2024-06-20 17:11:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-20 17:11:31,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-20 17:11:31,005 INFO L175 Difference]: Start difference. First operand has 304 places, 519 transitions, 12965 flow. Second operand 12 states and 220 transitions. [2024-06-20 17:11:31,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 605 transitions, 16076 flow [2024-06-20 17:11:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 605 transitions, 16016 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:11:33,077 INFO L231 Difference]: Finished difference. Result has 316 places, 541 transitions, 14203 flow [2024-06-20 17:11:33,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12905, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14203, PETRI_PLACES=316, PETRI_TRANSITIONS=541} [2024-06-20 17:11:33,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 17:11:33,078 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 541 transitions, 14203 flow [2024-06-20 17:11:33,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:33,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:33,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:11:33,079 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:33,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -952668388, now seen corresponding path program 1 times [2024-06-20 17:11:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301225737] [2024-06-20 17:11:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:33,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:36,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:36,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301225737] [2024-06-20 17:11:36,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301225737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:36,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:36,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:36,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390399432] [2024-06-20 17:11:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:36,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:36,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:36,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:36,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 541 transitions, 14203 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:36,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:36,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:39,497 INFO L124 PetriNetUnfolderBase]: 3763/6133 cut-off events. [2024-06-20 17:11:39,497 INFO L125 PetriNetUnfolderBase]: For 979236/979236 co-relation queries the response was YES. [2024-06-20 17:11:39,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86891 conditions, 6133 events. 3763/6133 cut-off events. For 979236/979236 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38645 event pairs, 611 based on Foata normal form. 3/6126 useless extension candidates. Maximal degree in co-relation 86745. Up to 4569 conditions per place. [2024-06-20 17:11:39,589 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 326 selfloop transitions, 255 changer transitions 0/586 dead transitions. [2024-06-20 17:11:39,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 586 transitions, 16153 flow [2024-06-20 17:11:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:11:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:11:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-20 17:11:39,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-20 17:11:39,591 INFO L175 Difference]: Start difference. First operand has 316 places, 541 transitions, 14203 flow. Second operand 11 states and 199 transitions. [2024-06-20 17:11:39,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 586 transitions, 16153 flow [2024-06-20 17:11:41,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 586 transitions, 16077 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 17:11:41,405 INFO L231 Difference]: Finished difference. Result has 325 places, 550 transitions, 15046 flow [2024-06-20 17:11:41,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14127, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15046, PETRI_PLACES=325, PETRI_TRANSITIONS=550} [2024-06-20 17:11:41,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-20 17:11:41,406 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 550 transitions, 15046 flow [2024-06-20 17:11:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:41,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:11:41,406 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1005854979, now seen corresponding path program 1 times [2024-06-20 17:11:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003771612] [2024-06-20 17:11:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003771612] [2024-06-20 17:11:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003771612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030521977] [2024-06-20 17:11:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:44,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:44,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:44,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 550 transitions, 15046 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:44,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:44,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:44,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:47,338 INFO L124 PetriNetUnfolderBase]: 3939/6425 cut-off events. [2024-06-20 17:11:47,338 INFO L125 PetriNetUnfolderBase]: For 1138471/1138471 co-relation queries the response was YES. [2024-06-20 17:11:47,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91901 conditions, 6425 events. 3939/6425 cut-off events. For 1138471/1138471 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 40761 event pairs, 942 based on Foata normal form. 54/6469 useless extension candidates. Maximal degree in co-relation 91752. Up to 5669 conditions per place. [2024-06-20 17:11:47,441 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 499 selfloop transitions, 70 changer transitions 4/578 dead transitions. [2024-06-20 17:11:47,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 578 transitions, 16474 flow [2024-06-20 17:11:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 17:11:47,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-20 17:11:47,443 INFO L175 Difference]: Start difference. First operand has 325 places, 550 transitions, 15046 flow. Second operand 10 states and 169 transitions. [2024-06-20 17:11:47,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 578 transitions, 16474 flow [2024-06-20 17:11:49,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 578 transitions, 16218 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:49,323 INFO L231 Difference]: Finished difference. Result has 330 places, 550 transitions, 14999 flow [2024-06-20 17:11:49,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14790, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14999, PETRI_PLACES=330, PETRI_TRANSITIONS=550} [2024-06-20 17:11:49,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-20 17:11:49,324 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 550 transitions, 14999 flow [2024-06-20 17:11:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:49,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:49,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:11:49,324 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:49,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1011365229, now seen corresponding path program 2 times [2024-06-20 17:11:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:49,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614964285] [2024-06-20 17:11:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:52,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614964285] [2024-06-20 17:11:52,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614964285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:52,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:52,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:11:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391333358] [2024-06-20 17:11:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:11:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:11:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:11:52,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:11:52,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 550 transitions, 14999 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:52,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:52,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:11:52,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:56,243 INFO L124 PetriNetUnfolderBase]: 4639/7558 cut-off events. [2024-06-20 17:11:56,243 INFO L125 PetriNetUnfolderBase]: For 1335026/1335026 co-relation queries the response was YES. [2024-06-20 17:11:56,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106814 conditions, 7558 events. 4639/7558 cut-off events. For 1335026/1335026 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49014 event pairs, 1098 based on Foata normal form. 58/7606 useless extension candidates. Maximal degree in co-relation 106664. Up to 5079 conditions per place. [2024-06-20 17:11:56,361 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 455 selfloop transitions, 162 changer transitions 0/622 dead transitions. [2024-06-20 17:11:56,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 622 transitions, 18172 flow [2024-06-20 17:11:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 214 transitions. [2024-06-20 17:11:56,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-20 17:11:56,363 INFO L175 Difference]: Start difference. First operand has 330 places, 550 transitions, 14999 flow. Second operand 12 states and 214 transitions. [2024-06-20 17:11:56,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 622 transitions, 18172 flow [2024-06-20 17:11:58,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 622 transitions, 17942 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:58,713 INFO L231 Difference]: Finished difference. Result has 339 places, 566 transitions, 15859 flow [2024-06-20 17:11:58,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14817, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15859, PETRI_PLACES=339, PETRI_TRANSITIONS=566} [2024-06-20 17:11:58,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-20 17:11:58,714 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 566 transitions, 15859 flow [2024-06-20 17:11:58,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:58,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:58,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:58,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:11:58,715 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:58,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash -850833551, now seen corresponding path program 3 times [2024-06-20 17:11:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531370289] [2024-06-20 17:11:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531370289] [2024-06-20 17:12:02,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531370289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:12:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574563113] [2024-06-20 17:12:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:12:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:12:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:12:02,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:02,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 566 transitions, 15859 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:02,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:02,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:02,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:05,732 INFO L124 PetriNetUnfolderBase]: 4605/7491 cut-off events. [2024-06-20 17:12:05,733 INFO L125 PetriNetUnfolderBase]: For 1313798/1313798 co-relation queries the response was YES. [2024-06-20 17:12:05,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106952 conditions, 7491 events. 4605/7491 cut-off events. For 1313798/1313798 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48868 event pairs, 1260 based on Foata normal form. 32/7503 useless extension candidates. Maximal degree in co-relation 106796. Up to 6612 conditions per place. [2024-06-20 17:12:05,866 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 125 changer transitions 0/600 dead transitions. [2024-06-20 17:12:05,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 600 transitions, 17568 flow [2024-06-20 17:12:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:12:05,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-20 17:12:05,867 INFO L175 Difference]: Start difference. First operand has 339 places, 566 transitions, 15859 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:12:05,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 600 transitions, 17568 flow [2024-06-20 17:12:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 600 transitions, 17331 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-20 17:12:08,700 INFO L231 Difference]: Finished difference. Result has 345 places, 575 transitions, 16219 flow [2024-06-20 17:12:08,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15622, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16219, PETRI_PLACES=345, PETRI_TRANSITIONS=575} [2024-06-20 17:12:08,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-20 17:12:08,701 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 575 transitions, 16219 flow [2024-06-20 17:12:08,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:08,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:08,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:12:08,701 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:08,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1011361509, now seen corresponding path program 3 times [2024-06-20 17:12:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998822390] [2024-06-20 17:12:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998822390] [2024-06-20 17:12:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998822390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:11,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:12:11,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239425983] [2024-06-20 17:12:11,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:11,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:12:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:12:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:12:11,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:11,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 575 transitions, 16219 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:15,315 INFO L124 PetriNetUnfolderBase]: 4781/7796 cut-off events. [2024-06-20 17:12:15,316 INFO L125 PetriNetUnfolderBase]: For 1389463/1389463 co-relation queries the response was YES. [2024-06-20 17:12:15,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109888 conditions, 7796 events. 4781/7796 cut-off events. For 1389463/1389463 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51240 event pairs, 910 based on Foata normal form. 54/7840 useless extension candidates. Maximal degree in co-relation 109729. Up to 5689 conditions per place. [2024-06-20 17:12:15,431 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 321 selfloop transitions, 284 changer transitions 3/613 dead transitions. [2024-06-20 17:12:15,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 613 transitions, 17992 flow [2024-06-20 17:12:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 17:12:15,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 17:12:15,432 INFO L175 Difference]: Start difference. First operand has 345 places, 575 transitions, 16219 flow. Second operand 10 states and 180 transitions. [2024-06-20 17:12:15,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 613 transitions, 17992 flow [2024-06-20 17:12:17,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 613 transitions, 17754 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:17,845 INFO L231 Difference]: Finished difference. Result has 349 places, 576 transitions, 16628 flow [2024-06-20 17:12:17,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15981, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16628, PETRI_PLACES=349, PETRI_TRANSITIONS=576} [2024-06-20 17:12:17,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-20 17:12:17,847 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 576 transitions, 16628 flow [2024-06-20 17:12:17,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:17,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:17,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:12:17,848 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:17,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1011211407, now seen corresponding path program 4 times [2024-06-20 17:12:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:17,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280098547] [2024-06-20 17:12:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:22,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:22,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280098547] [2024-06-20 17:12:22,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280098547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:22,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:22,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:12:22,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341029859] [2024-06-20 17:12:22,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:12:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:12:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:12:22,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:22,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 576 transitions, 16628 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:22,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:22,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:22,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:25,570 INFO L124 PetriNetUnfolderBase]: 4769/7792 cut-off events. [2024-06-20 17:12:25,570 INFO L125 PetriNetUnfolderBase]: For 1334677/1334677 co-relation queries the response was YES. [2024-06-20 17:12:25,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110781 conditions, 7792 events. 4769/7792 cut-off events. For 1334677/1334677 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51437 event pairs, 1333 based on Foata normal form. 16/7798 useless extension candidates. Maximal degree in co-relation 110621. Up to 7225 conditions per place. [2024-06-20 17:12:25,720 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 502 selfloop transitions, 94 changer transitions 0/601 dead transitions. [2024-06-20 17:12:25,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 601 transitions, 18081 flow [2024-06-20 17:12:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:12:25,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 17:12:25,722 INFO L175 Difference]: Start difference. First operand has 349 places, 576 transitions, 16628 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:12:25,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 601 transitions, 18081 flow [2024-06-20 17:12:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 601 transitions, 17525 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:28,663 INFO L231 Difference]: Finished difference. Result has 352 places, 580 transitions, 16416 flow [2024-06-20 17:12:28,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16078, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16416, PETRI_PLACES=352, PETRI_TRANSITIONS=580} [2024-06-20 17:12:28,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-20 17:12:28,664 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 580 transitions, 16416 flow [2024-06-20 17:12:28,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:28,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:28,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:12:28,665 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:28,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -958238313, now seen corresponding path program 4 times [2024-06-20 17:12:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163326212] [2024-06-20 17:12:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:32,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:32,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163326212] [2024-06-20 17:12:32,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163326212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:32,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:12:32,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195011156] [2024-06-20 17:12:32,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:32,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:12:32,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:32,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:12:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:12:32,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:32,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 580 transitions, 16416 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:32,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:32,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:32,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:35,692 INFO L124 PetriNetUnfolderBase]: 4886/7988 cut-off events. [2024-06-20 17:12:35,693 INFO L125 PetriNetUnfolderBase]: For 1409814/1409814 co-relation queries the response was YES. [2024-06-20 17:12:35,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110623 conditions, 7988 events. 4886/7988 cut-off events. For 1409814/1409814 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 52850 event pairs, 1017 based on Foata normal form. 54/8032 useless extension candidates. Maximal degree in co-relation 110462. Up to 5996 conditions per place. [2024-06-20 17:12:35,831 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 344 selfloop transitions, 264 changer transitions 3/616 dead transitions. [2024-06-20 17:12:35,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 616 transitions, 18139 flow [2024-06-20 17:12:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:12:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:12:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-20 17:12:35,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-20 17:12:35,832 INFO L175 Difference]: Start difference. First operand has 352 places, 580 transitions, 16416 flow. Second operand 10 states and 179 transitions. [2024-06-20 17:12:35,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 616 transitions, 18139 flow [2024-06-20 17:12:38,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 616 transitions, 17914 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 17:12:38,644 INFO L231 Difference]: Finished difference. Result has 355 places, 581 transitions, 16801 flow [2024-06-20 17:12:38,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16191, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16801, PETRI_PLACES=355, PETRI_TRANSITIONS=581} [2024-06-20 17:12:38,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-20 17:12:38,645 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 581 transitions, 16801 flow [2024-06-20 17:12:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:38,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:12:38,646 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:38,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1738143868, now seen corresponding path program 1 times [2024-06-20 17:12:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:38,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041998857] [2024-06-20 17:12:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041998857] [2024-06-20 17:12:41,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041998857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:41,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:41,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:41,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806199275] [2024-06-20 17:12:41,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:41,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:41,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:41,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:41,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:41,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 581 transitions, 16801 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:41,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:41,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:41,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:45,370 INFO L124 PetriNetUnfolderBase]: 4941/8090 cut-off events. [2024-06-20 17:12:45,370 INFO L125 PetriNetUnfolderBase]: For 1351119/1351119 co-relation queries the response was YES. [2024-06-20 17:12:45,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114196 conditions, 8090 events. 4941/8090 cut-off events. For 1351119/1351119 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53986 event pairs, 1114 based on Foata normal form. 1/8088 useless extension candidates. Maximal degree in co-relation 114034. Up to 6525 conditions per place. [2024-06-20 17:12:45,516 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 425 selfloop transitions, 209 changer transitions 0/639 dead transitions. [2024-06-20 17:12:45,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 639 transitions, 18932 flow [2024-06-20 17:12:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:12:45,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 17:12:45,518 INFO L175 Difference]: Start difference. First operand has 355 places, 581 transitions, 16801 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:12:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 639 transitions, 18932 flow [2024-06-20 17:12:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 639 transitions, 18777 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:48,548 INFO L231 Difference]: Finished difference. Result has 361 places, 598 transitions, 17853 flow [2024-06-20 17:12:48,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16646, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17853, PETRI_PLACES=361, PETRI_TRANSITIONS=598} [2024-06-20 17:12:48,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-20 17:12:48,549 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 598 transitions, 17853 flow [2024-06-20 17:12:48,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:48,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:48,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:12:48,550 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:48,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1371241102, now seen corresponding path program 1 times [2024-06-20 17:12:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298129604] [2024-06-20 17:12:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:48,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:52,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298129604] [2024-06-20 17:12:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298129604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:52,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:12:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311473637] [2024-06-20 17:12:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:52,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:12:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:12:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:12:52,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:12:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 598 transitions, 17853 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:12:52,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:56,157 INFO L124 PetriNetUnfolderBase]: 4951/8074 cut-off events. [2024-06-20 17:12:56,157 INFO L125 PetriNetUnfolderBase]: For 1407492/1407492 co-relation queries the response was YES. [2024-06-20 17:12:56,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116316 conditions, 8074 events. 4951/8074 cut-off events. For 1407492/1407492 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 53582 event pairs, 1375 based on Foata normal form. 2/8056 useless extension candidates. Maximal degree in co-relation 116149. Up to 7368 conditions per place. [2024-06-20 17:12:56,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 518 selfloop transitions, 99 changer transitions 0/622 dead transitions. [2024-06-20 17:12:56,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 622 transitions, 19538 flow [2024-06-20 17:12:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:12:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:12:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:12:56,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-20 17:12:56,280 INFO L175 Difference]: Start difference. First operand has 361 places, 598 transitions, 17853 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:12:56,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 622 transitions, 19538 flow [2024-06-20 17:12:59,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 622 transitions, 19427 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 17:12:59,327 INFO L231 Difference]: Finished difference. Result has 366 places, 601 transitions, 18095 flow [2024-06-20 17:12:59,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17742, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18095, PETRI_PLACES=366, PETRI_TRANSITIONS=601} [2024-06-20 17:12:59,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-20 17:12:59,328 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 601 transitions, 18095 flow [2024-06-20 17:12:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:59,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:59,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:12:59,328 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:59,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1662850534, now seen corresponding path program 2 times [2024-06-20 17:12:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984160971] [2024-06-20 17:12:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:02,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:02,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984160971] [2024-06-20 17:13:02,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984160971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:02,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484653168] [2024-06-20 17:13:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:02,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:02,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:02,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:02,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 601 transitions, 18095 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:02,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:02,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:06,776 INFO L124 PetriNetUnfolderBase]: 4977/8125 cut-off events. [2024-06-20 17:13:06,776 INFO L125 PetriNetUnfolderBase]: For 1434755/1434755 co-relation queries the response was YES. [2024-06-20 17:13:06,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117586 conditions, 8125 events. 4977/8125 cut-off events. For 1434755/1434755 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 53843 event pairs, 1135 based on Foata normal form. 1/8123 useless extension candidates. Maximal degree in co-relation 117417. Up to 6720 conditions per place. [2024-06-20 17:13:06,927 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 204 changer transitions 0/662 dead transitions. [2024-06-20 17:13:06,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 662 transitions, 20462 flow [2024-06-20 17:13:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:13:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:13:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 240 transitions. [2024-06-20 17:13:06,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-20 17:13:06,929 INFO L175 Difference]: Start difference. First operand has 366 places, 601 transitions, 18095 flow. Second operand 14 states and 240 transitions. [2024-06-20 17:13:06,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 662 transitions, 20462 flow [2024-06-20 17:13:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 662 transitions, 20155 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-20 17:13:10,295 INFO L231 Difference]: Finished difference. Result has 377 places, 609 transitions, 18528 flow [2024-06-20 17:13:10,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17788, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18528, PETRI_PLACES=377, PETRI_TRANSITIONS=609} [2024-06-20 17:13:10,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-20 17:13:10,296 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 609 transitions, 18528 flow [2024-06-20 17:13:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:10,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:10,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:13:10,297 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:10,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1371627052, now seen corresponding path program 2 times [2024-06-20 17:13:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:10,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471577043] [2024-06-20 17:13:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471577043] [2024-06-20 17:13:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471577043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:14,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360254778] [2024-06-20 17:13:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:14,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:14,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 609 transitions, 18528 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:14,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:14,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:14,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:18,399 INFO L124 PetriNetUnfolderBase]: 4971/8114 cut-off events. [2024-06-20 17:13:18,399 INFO L125 PetriNetUnfolderBase]: For 1472969/1472969 co-relation queries the response was YES. [2024-06-20 17:13:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118516 conditions, 8114 events. 4971/8114 cut-off events. For 1472969/1472969 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53786 event pairs, 1414 based on Foata normal form. 2/8106 useless extension candidates. Maximal degree in co-relation 118344. Up to 7665 conditions per place. [2024-06-20 17:13:18,527 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 565 selfloop transitions, 58 changer transitions 0/628 dead transitions. [2024-06-20 17:13:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 628 transitions, 19872 flow [2024-06-20 17:13:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:13:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:13:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:13:18,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-20 17:13:18,528 INFO L175 Difference]: Start difference. First operand has 377 places, 609 transitions, 18528 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:13:18,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 628 transitions, 19872 flow [2024-06-20 17:13:21,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 628 transitions, 19670 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-20 17:13:21,985 INFO L231 Difference]: Finished difference. Result has 376 places, 609 transitions, 18449 flow [2024-06-20 17:13:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18326, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18449, PETRI_PLACES=376, PETRI_TRANSITIONS=609} [2024-06-20 17:13:21,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-20 17:13:21,986 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 609 transitions, 18449 flow [2024-06-20 17:13:21,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:21,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:21,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:13:21,987 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:21,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1889128396, now seen corresponding path program 1 times [2024-06-20 17:13:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:21,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899857665] [2024-06-20 17:13:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:21,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:25,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:25,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899857665] [2024-06-20 17:13:25,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899857665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:25,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:25,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325046752] [2024-06-20 17:13:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:25,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:25,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:25,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 609 transitions, 18449 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:25,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:25,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:25,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:29,073 INFO L124 PetriNetUnfolderBase]: 4953/8075 cut-off events. [2024-06-20 17:13:29,073 INFO L125 PetriNetUnfolderBase]: For 1499783/1499783 co-relation queries the response was YES. [2024-06-20 17:13:29,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117896 conditions, 8075 events. 4953/8075 cut-off events. For 1499783/1499783 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53232 event pairs, 1128 based on Foata normal form. 8/8063 useless extension candidates. Maximal degree in co-relation 117722. Up to 7135 conditions per place. [2024-06-20 17:13:29,204 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 564 selfloop transitions, 68 changer transitions 0/637 dead transitions. [2024-06-20 17:13:29,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 637 transitions, 20175 flow [2024-06-20 17:13:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:13:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:13:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:13:29,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 17:13:29,205 INFO L175 Difference]: Start difference. First operand has 376 places, 609 transitions, 18449 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:13:29,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 637 transitions, 20175 flow [2024-06-20 17:13:32,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 637 transitions, 19998 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:13:32,352 INFO L231 Difference]: Finished difference. Result has 375 places, 609 transitions, 18412 flow [2024-06-20 17:13:32,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18272, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18412, PETRI_PLACES=375, PETRI_TRANSITIONS=609} [2024-06-20 17:13:32,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-20 17:13:32,353 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 609 transitions, 18412 flow [2024-06-20 17:13:32,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:32,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:32,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:32,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:13:32,353 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:32,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 815829108, now seen corresponding path program 2 times [2024-06-20 17:13:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790718249] [2024-06-20 17:13:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790718249] [2024-06-20 17:13:36,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790718249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:36,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:36,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:13:36,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318058023] [2024-06-20 17:13:36,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:36,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:13:36,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:13:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:13:36,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:36,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 609 transitions, 18412 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:36,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:36,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:36,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:39,809 INFO L124 PetriNetUnfolderBase]: 4935/8043 cut-off events. [2024-06-20 17:13:39,809 INFO L125 PetriNetUnfolderBase]: For 1502781/1502781 co-relation queries the response was YES. [2024-06-20 17:13:39,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117552 conditions, 8043 events. 4935/8043 cut-off events. For 1502781/1502781 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53211 event pairs, 1325 based on Foata normal form. 8/8031 useless extension candidates. Maximal degree in co-relation 117377. Up to 7395 conditions per place. [2024-06-20 17:13:39,943 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 568 selfloop transitions, 58 changer transitions 0/631 dead transitions. [2024-06-20 17:13:39,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 631 transitions, 19956 flow [2024-06-20 17:13:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:13:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:13:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:13:39,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-20 17:13:39,945 INFO L175 Difference]: Start difference. First operand has 375 places, 609 transitions, 18412 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:13:39,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 631 transitions, 19956 flow [2024-06-20 17:13:43,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 631 transitions, 19776 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:13:43,317 INFO L231 Difference]: Finished difference. Result has 377 places, 609 transitions, 18354 flow [2024-06-20 17:13:43,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18232, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18354, PETRI_PLACES=377, PETRI_TRANSITIONS=609} [2024-06-20 17:13:43,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-20 17:13:43,318 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 609 transitions, 18354 flow [2024-06-20 17:13:43,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:43,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:43,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:13:43,319 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:43,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1604709232, now seen corresponding path program 1 times [2024-06-20 17:13:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:43,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798788472] [2024-06-20 17:13:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798788472] [2024-06-20 17:13:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798788472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:46,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:13:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473989010] [2024-06-20 17:13:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:46,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:13:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:13:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:13:46,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:46,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 609 transitions, 18354 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:46,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:46,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:51,228 INFO L124 PetriNetUnfolderBase]: 4982/8133 cut-off events. [2024-06-20 17:13:51,229 INFO L125 PetriNetUnfolderBase]: For 1538468/1538468 co-relation queries the response was YES. [2024-06-20 17:13:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117976 conditions, 8133 events. 4982/8133 cut-off events. For 1538468/1538468 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 53953 event pairs, 1078 based on Foata normal form. 15/8145 useless extension candidates. Maximal degree in co-relation 117801. Up to 6699 conditions per place. [2024-06-20 17:13:51,383 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 447 selfloop transitions, 210 changer transitions 6/668 dead transitions. [2024-06-20 17:13:51,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 668 transitions, 20471 flow [2024-06-20 17:13:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:13:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:13:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2024-06-20 17:13:51,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-20 17:13:51,384 INFO L175 Difference]: Start difference. First operand has 377 places, 609 transitions, 18354 flow. Second operand 14 states and 232 transitions. [2024-06-20 17:13:51,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 668 transitions, 20471 flow [2024-06-20 17:13:55,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 668 transitions, 20327 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:55,222 INFO L231 Difference]: Finished difference. Result has 388 places, 615 transitions, 19024 flow [2024-06-20 17:13:55,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18210, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19024, PETRI_PLACES=388, PETRI_TRANSITIONS=615} [2024-06-20 17:13:55,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-20 17:13:55,223 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 615 transitions, 19024 flow [2024-06-20 17:13:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:55,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:55,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:13:55,224 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:55,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 589032908, now seen corresponding path program 3 times [2024-06-20 17:13:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:55,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243171778] [2024-06-20 17:13:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243171778] [2024-06-20 17:13:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243171778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:58,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:58,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371605571] [2024-06-20 17:13:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:58,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:13:58,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 615 transitions, 19024 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:58,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:58,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:13:58,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:02,305 INFO L124 PetriNetUnfolderBase]: 4973/8111 cut-off events. [2024-06-20 17:14:02,305 INFO L125 PetriNetUnfolderBase]: For 1605400/1605400 co-relation queries the response was YES. [2024-06-20 17:14:02,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120650 conditions, 8111 events. 4973/8111 cut-off events. For 1605400/1605400 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 53736 event pairs, 1395 based on Foata normal form. 1/8092 useless extension candidates. Maximal degree in co-relation 120471. Up to 7494 conditions per place. [2024-06-20 17:14:02,432 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 565 selfloop transitions, 73 changer transitions 0/643 dead transitions. [2024-06-20 17:14:02,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 643 transitions, 20637 flow [2024-06-20 17:14:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:14:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-20 17:14:02,433 INFO L175 Difference]: Start difference. First operand has 388 places, 615 transitions, 19024 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:14:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 643 transitions, 20637 flow [2024-06-20 17:14:05,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 643 transitions, 20133 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-20 17:14:05,496 INFO L231 Difference]: Finished difference. Result has 387 places, 618 transitions, 18814 flow [2024-06-20 17:14:05,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18526, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18814, PETRI_PLACES=387, PETRI_TRANSITIONS=618} [2024-06-20 17:14:05,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-20 17:14:05,497 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 618 transitions, 18814 flow [2024-06-20 17:14:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:05,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:05,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:05,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:14:05,497 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:05,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:05,498 INFO L85 PathProgramCache]: Analyzing trace with hash 638595916, now seen corresponding path program 4 times [2024-06-20 17:14:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:05,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901829209] [2024-06-20 17:14:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:05,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:08,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901829209] [2024-06-20 17:14:08,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901829209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:08,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:08,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988165328] [2024-06-20 17:14:08,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:08,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:08,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:08,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:14:08,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 618 transitions, 18814 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:08,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:08,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:14:08,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:13,017 INFO L124 PetriNetUnfolderBase]: 4991/8150 cut-off events. [2024-06-20 17:14:13,017 INFO L125 PetriNetUnfolderBase]: For 1614399/1614399 co-relation queries the response was YES. [2024-06-20 17:14:13,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120419 conditions, 8150 events. 4991/8150 cut-off events. For 1614399/1614399 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 54048 event pairs, 1380 based on Foata normal form. 1/8141 useless extension candidates. Maximal degree in co-relation 120239. Up to 7721 conditions per place. [2024-06-20 17:14:13,151 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 602 selfloop transitions, 45 changer transitions 0/652 dead transitions. [2024-06-20 17:14:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 652 transitions, 20663 flow [2024-06-20 17:14:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:14:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:14:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:14:13,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-20 17:14:13,153 INFO L175 Difference]: Start difference. First operand has 387 places, 618 transitions, 18814 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:14:13,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 652 transitions, 20663 flow [2024-06-20 17:14:16,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 652 transitions, 20499 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:14:16,600 INFO L231 Difference]: Finished difference. Result has 392 places, 623 transitions, 18920 flow [2024-06-20 17:14:16,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18650, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18920, PETRI_PLACES=392, PETRI_TRANSITIONS=623} [2024-06-20 17:14:16,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-20 17:14:16,601 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 623 transitions, 18920 flow [2024-06-20 17:14:16,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:16,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:16,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:14:16,601 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:16,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1553595406, now seen corresponding path program 5 times [2024-06-20 17:14:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807040038] [2024-06-20 17:14:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:20,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807040038] [2024-06-20 17:14:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807040038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:20,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:20,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:14:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024975717] [2024-06-20 17:14:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:20,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:14:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:14:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:14:20,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 17:14:20,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 623 transitions, 18920 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:20,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:20,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 17:14:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand