./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.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/mix055_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix055_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:38:30,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:38:30,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:38:30,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:38:30,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:38:30,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:38:30,959 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:38:30,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:38:30,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:38:30,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:38:30,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:38:30,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:38:30,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:38:30,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:38:30,963 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:38:30,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:38:30,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:38:30,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:38:30,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:38:30,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:38:30,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:38:30,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:38:30,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:38:30,968 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:38:30,968 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:38:30,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:38:30,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:38:30,969 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:38:30,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:38:30,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:38:30,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:38:30,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:38:30,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:30,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:38:30,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:38:30,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:38:30,971 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:38:31,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:38:31,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:38:31,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:38:31,179 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:38:31,179 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:38:31,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i [2024-06-14 12:38:32,219 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:38:32,421 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:38:32,421 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i [2024-06-14 12:38:32,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dff831d8/b1eb6285264340fa9f3ecc1ddb5aecbe/FLAGb45175fc4 [2024-06-14 12:38:32,449 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dff831d8/b1eb6285264340fa9f3ecc1ddb5aecbe [2024-06-14 12:38:32,451 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:38:32,451 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:38:32,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix055_tso.oepc.yml/witness.yml [2024-06-14 12:38:32,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:38:32,581 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:38:32,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:32,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:38:32,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:38:32,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:32" (1/2) ... [2024-06-14 12:38:32,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f843e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:32, skipping insertion in model container [2024-06-14 12:38:32,587 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:32" (1/2) ... [2024-06-14 12:38:32,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67d6d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:32, skipping insertion in model container [2024-06-14 12:38:32,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:32" (2/2) ... [2024-06-14 12:38:32,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f843e71 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:32, skipping insertion in model container [2024-06-14 12:38:32,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:32" (2/2) ... [2024-06-14 12:38:32,589 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:38:32,670 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:38:32,671 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! 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 || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:38:32,672 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:38:32,672 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! 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 || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:38:32,672 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:38:32,672 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:38:32,673 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:38:32,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:38:32,985 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:33,004 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:38:33,117 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:33,150 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:38:33,151 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33 WrapperNode [2024-06-14 12:38:33,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:33,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:33,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:38:33,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:38:33,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,198 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-14 12:38:33,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:33,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:38:33,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:38:33,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:38:33,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,210 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,222 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:38:33,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:38:33,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:38:33,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:38:33,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:38:33,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (1/1) ... [2024-06-14 12:38:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:33,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:38:33,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:38:33,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:38:33,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:38:33,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:38:33,305 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:38:33,305 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:38:33,305 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:38:33,305 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:38:33,305 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:38:33,306 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:38:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:38:33,306 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:38:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:38:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:38:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:38:33,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:38:33,308 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:38:33,454 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:38:33,456 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:38:33,842 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:38:33,843 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:38:33,963 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:38:33,964 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:38:33,964 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:33 BoogieIcfgContainer [2024-06-14 12:38:33,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:38:33,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:38:33,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:38:33,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:38:33,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:38:32" (1/4) ... [2024-06-14 12:38:33,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e846ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:38:33, skipping insertion in model container [2024-06-14 12:38:33,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:32" (2/4) ... [2024-06-14 12:38:33,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e846ba9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:33, skipping insertion in model container [2024-06-14 12:38:33,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:33" (3/4) ... [2024-06-14 12:38:33,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e846ba9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:33, skipping insertion in model container [2024-06-14 12:38:33,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:33" (4/4) ... [2024-06-14 12:38:33,970 INFO L112 eAbstractionObserver]: Analyzing ICFG mix055_tso.oepc.i [2024-06-14 12:38:33,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:38:33,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:38:33,984 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:38:34,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:38:34,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:38:34,075 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 12:38:34,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:38:34,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:38:34,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 12:38:34,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:38:34,090 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;@1e0659d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:38:34,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:38:34,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:38:34,093 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:38:34,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:34,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:34,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:38:34,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:34,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -779787810, now seen corresponding path program 1 times [2024-06-14 12:38:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032718389] [2024-06-14 12:38:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:35,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:35,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032718389] [2024-06-14 12:38:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032718389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:35,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:38:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132411896] [2024-06-14 12:38:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:38:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:38:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:38:35,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:38:35,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:35,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:35,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:38:35,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:37,079 INFO L124 PetriNetUnfolderBase]: 9903/13810 cut-off events. [2024-06-14 12:38:37,079 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2024-06-14 12:38:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27716 conditions, 13810 events. 9903/13810 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 75140 event pairs, 7667 based on Foata normal form. 1/13588 useless extension candidates. Maximal degree in co-relation 27700. Up to 13453 conditions per place. [2024-06-14 12:38:37,161 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 12:38:37,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 233 flow [2024-06-14 12:38:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:38:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:38:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-14 12:38:37,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-14 12:38:37,171 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 90 transitions. [2024-06-14 12:38:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 233 flow [2024-06-14 12:38:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:37,176 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 12:38:37,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 12:38:37,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 12:38:37,180 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 12:38:37,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:37,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:37,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:38:37,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2051753155, now seen corresponding path program 1 times [2024-06-14 12:38:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:37,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158009339] [2024-06-14 12:38:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:37,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158009339] [2024-06-14 12:38:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158009339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:37,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:38:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29834059] [2024-06-14 12:38:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:38:37,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:38:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:38:38,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:38:38,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:38,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:38,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:38:38,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:39,640 INFO L124 PetriNetUnfolderBase]: 11585/15736 cut-off events. [2024-06-14 12:38:39,641 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2024-06-14 12:38:39,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35857 conditions, 15736 events. 11585/15736 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81885 event pairs, 8249 based on Foata normal form. 4/15738 useless extension candidates. Maximal degree in co-relation 35842. Up to 15650 conditions per place. [2024-06-14 12:38:39,713 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 12:38:39,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 327 flow [2024-06-14 12:38:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:38:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:38:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-14 12:38:39,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432692307692307 [2024-06-14 12:38:39,715 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 113 transitions. [2024-06-14 12:38:39,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 327 flow [2024-06-14 12:38:39,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:38:39,717 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-14 12:38:39,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-14 12:38:39,718 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-14 12:38:39,718 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-14 12:38:39,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:39,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:39,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:38:39,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:39,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash 820162407, now seen corresponding path program 1 times [2024-06-14 12:38:39,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:39,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380146611] [2024-06-14 12:38:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:39,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380146611] [2024-06-14 12:38:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380146611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:40,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:38:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207246670] [2024-06-14 12:38:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:38:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:38:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:38:40,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:38:40,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:40,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:38:40,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:41,862 INFO L124 PetriNetUnfolderBase]: 11565/15710 cut-off events. [2024-06-14 12:38:41,863 INFO L125 PetriNetUnfolderBase]: For 8281/8281 co-relation queries the response was YES. [2024-06-14 12:38:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39748 conditions, 15710 events. 11565/15710 cut-off events. For 8281/8281 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81706 event pairs, 6611 based on Foata normal form. 8/15716 useless extension candidates. Maximal degree in co-relation 39731. Up to 15580 conditions per place. [2024-06-14 12:38:41,944 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 67 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-14 12:38:41,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 439 flow [2024-06-14 12:38:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-14 12:38:41,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-06-14 12:38:41,946 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 139 transitions. [2024-06-14 12:38:41,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 439 flow [2024-06-14 12:38:41,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 420 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:41,949 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 227 flow [2024-06-14 12:38:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-14 12:38:41,950 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-14 12:38:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 227 flow [2024-06-14 12:38:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:41,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:41,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:38:41,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:41,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1239009080, now seen corresponding path program 1 times [2024-06-14 12:38:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:41,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369974462] [2024-06-14 12:38:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:43,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:43,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369974462] [2024-06-14 12:38:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369974462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299575731] [2024-06-14 12:38:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:43,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:38:43,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:43,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:43,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:38:43,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:44,884 INFO L124 PetriNetUnfolderBase]: 11549/15684 cut-off events. [2024-06-14 12:38:44,885 INFO L125 PetriNetUnfolderBase]: For 16071/16071 co-relation queries the response was YES. [2024-06-14 12:38:44,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43598 conditions, 15684 events. 11549/15684 cut-off events. For 16071/16071 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81730 event pairs, 5646 based on Foata normal form. 8/15690 useless extension candidates. Maximal degree in co-relation 43580. Up to 15514 conditions per place. [2024-06-14 12:38:44,973 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 74 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-14 12:38:44,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 523 flow [2024-06-14 12:38:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:38:44,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-14 12:38:44,975 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 227 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:38:44,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 523 flow [2024-06-14 12:38:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 95 transitions, 490 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:44,979 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 258 flow [2024-06-14 12:38:44,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 12:38:44,980 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 12:38:44,980 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 258 flow [2024-06-14 12:38:44,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:44,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:44,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:44,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:38:44,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:44,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1960933374, now seen corresponding path program 1 times [2024-06-14 12:38:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:44,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518905087] [2024-06-14 12:38:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:44,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518905087] [2024-06-14 12:38:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518905087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731919941] [2024-06-14 12:38:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:45,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:38:45,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-14 12:38:45,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:45,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:38:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:46,985 INFO L124 PetriNetUnfolderBase]: 9848/13724 cut-off events. [2024-06-14 12:38:46,985 INFO L125 PetriNetUnfolderBase]: For 21341/21341 co-relation queries the response was YES. [2024-06-14 12:38:47,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40759 conditions, 13724 events. 9848/13724 cut-off events. For 21341/21341 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74276 event pairs, 5737 based on Foata normal form. 3/13725 useless extension candidates. Maximal degree in co-relation 40740. Up to 13360 conditions per place. [2024-06-14 12:38:47,077 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 61 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-14 12:38:47,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 470 flow [2024-06-14 12:38:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 12:38:47,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-14 12:38:47,079 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 258 flow. Second operand 5 states and 118 transitions. [2024-06-14 12:38:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 470 flow [2024-06-14 12:38:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 424 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:47,085 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 277 flow [2024-06-14 12:38:47,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-14 12:38:47,085 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-14 12:38:47,086 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 277 flow [2024-06-14 12:38:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-14 12:38:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:47,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:38:47,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:47,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1039331939, now seen corresponding path program 1 times [2024-06-14 12:38:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:47,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323761088] [2024-06-14 12:38:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:47,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323761088] [2024-06-14 12:38:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323761088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141401080] [2024-06-14 12:38:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:47,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:38:47,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:47,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:47,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:38:47,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:49,330 INFO L124 PetriNetUnfolderBase]: 11562/15702 cut-off events. [2024-06-14 12:38:49,330 INFO L125 PetriNetUnfolderBase]: For 36223/36223 co-relation queries the response was YES. [2024-06-14 12:38:49,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50570 conditions, 15702 events. 11562/15702 cut-off events. For 36223/36223 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81551 event pairs, 6742 based on Foata normal form. 3/15703 useless extension candidates. Maximal degree in co-relation 50549. Up to 15601 conditions per place. [2024-06-14 12:38:49,422 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 12:38:49,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 551 flow [2024-06-14 12:38:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 12:38:49,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-14 12:38:49,424 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 277 flow. Second operand 6 states and 138 transitions. [2024-06-14 12:38:49,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 551 flow [2024-06-14 12:38:49,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 518 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:49,431 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 323 flow [2024-06-14 12:38:49,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-14 12:38:49,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-14 12:38:49,432 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 323 flow [2024-06-14 12:38:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:49,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:49,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:49,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:38:49,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:49,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1033618019, now seen corresponding path program 2 times [2024-06-14 12:38:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471628391] [2024-06-14 12:38:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471628391] [2024-06-14 12:38:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471628391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:50,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:50,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:50,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023067854] [2024-06-14 12:38:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:50,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:50,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:50,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:38:50,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 323 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:50,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:50,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:38:50,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:51,711 INFO L124 PetriNetUnfolderBase]: 11553/15693 cut-off events. [2024-06-14 12:38:51,712 INFO L125 PetriNetUnfolderBase]: For 48964/48980 co-relation queries the response was YES. [2024-06-14 12:38:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54396 conditions, 15693 events. 11553/15693 cut-off events. For 48964/48980 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81459 event pairs, 6702 based on Foata normal form. 15/15704 useless extension candidates. Maximal degree in co-relation 54374. Up to 15559 conditions per place. [2024-06-14 12:38:51,824 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 66 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-14 12:38:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 599 flow [2024-06-14 12:38:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 12:38:51,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-14 12:38:51,826 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 323 flow. Second operand 6 states and 137 transitions. [2024-06-14 12:38:51,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 599 flow [2024-06-14 12:38:51,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 552 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:51,971 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 377 flow [2024-06-14 12:38:51,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-14 12:38:51,971 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-14 12:38:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 377 flow [2024-06-14 12:38:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:51,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:51,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:51,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:38:51,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:51,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:51,973 INFO L85 PathProgramCache]: Analyzing trace with hash -313263703, now seen corresponding path program 1 times [2024-06-14 12:38:51,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72543490] [2024-06-14 12:38:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:53,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:53,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72543490] [2024-06-14 12:38:53,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72543490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:53,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:53,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:53,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134120108] [2024-06-14 12:38:53,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:53,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:53,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:38:53,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 377 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:53,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:53,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:38:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:54,750 INFO L124 PetriNetUnfolderBase]: 11976/16592 cut-off events. [2024-06-14 12:38:54,750 INFO L125 PetriNetUnfolderBase]: For 63649/63649 co-relation queries the response was YES. [2024-06-14 12:38:54,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60320 conditions, 16592 events. 11976/16592 cut-off events. For 63649/63649 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 89343 event pairs, 6810 based on Foata normal form. 3/16593 useless extension candidates. Maximal degree in co-relation 60297. Up to 16170 conditions per place. [2024-06-14 12:38:54,837 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 84 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-14 12:38:54,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 722 flow [2024-06-14 12:38:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 12:38:54,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:38:54,838 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 377 flow. Second operand 7 states and 156 transitions. [2024-06-14 12:38:54,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 722 flow [2024-06-14 12:38:54,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 648 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:54,851 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 426 flow [2024-06-14 12:38:54,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-14 12:38:54,852 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-14 12:38:54,852 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 426 flow [2024-06-14 12:38:54,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:54,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:54,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:54,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:38:54,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:54,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2140329991, now seen corresponding path program 1 times [2024-06-14 12:38:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039721856] [2024-06-14 12:38:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:55,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039721856] [2024-06-14 12:38:55,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039721856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:55,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:55,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:55,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024959468] [2024-06-14 12:38:55,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:55,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:55,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:55,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:38:55,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:55,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:38:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:57,532 INFO L124 PetriNetUnfolderBase]: 13790/18698 cut-off events. [2024-06-14 12:38:57,532 INFO L125 PetriNetUnfolderBase]: For 97667/97683 co-relation queries the response was YES. [2024-06-14 12:38:57,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74416 conditions, 18698 events. 13790/18698 cut-off events. For 97667/97683 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 98732 event pairs, 6953 based on Foata normal form. 6/18702 useless extension candidates. Maximal degree in co-relation 74391. Up to 18525 conditions per place. [2024-06-14 12:38:57,663 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 94 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-14 12:38:57,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 122 transitions, 818 flow [2024-06-14 12:38:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 12:38:57,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-14 12:38:57,666 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 426 flow. Second operand 7 states and 164 transitions. [2024-06-14 12:38:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 122 transitions, 818 flow [2024-06-14 12:38:57,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 757 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:57,685 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 497 flow [2024-06-14 12:38:57,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-14 12:38:57,686 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-14 12:38:57,686 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 497 flow [2024-06-14 12:38:57,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:57,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:57,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:38:57,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:38:57,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2140449961, now seen corresponding path program 2 times [2024-06-14 12:38:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527250837] [2024-06-14 12:38:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527250837] [2024-06-14 12:38:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527250837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:58,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930243991] [2024-06-14 12:38:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:58,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:38:58,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:58,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:58,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:38:58,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:00,808 INFO L124 PetriNetUnfolderBase]: 14014/19004 cut-off events. [2024-06-14 12:39:00,808 INFO L125 PetriNetUnfolderBase]: For 127787/127803 co-relation queries the response was YES. [2024-06-14 12:39:00,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82014 conditions, 19004 events. 14014/19004 cut-off events. For 127787/127803 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 100325 event pairs, 6728 based on Foata normal form. 28/19030 useless extension candidates. Maximal degree in co-relation 81987. Up to 18640 conditions per place. [2024-06-14 12:39:00,946 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 96 selfloop transitions, 32 changer transitions 0/134 dead transitions. [2024-06-14 12:39:00,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 1037 flow [2024-06-14 12:39:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 12:39:00,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:39:00,948 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 497 flow. Second operand 7 states and 169 transitions. [2024-06-14 12:39:00,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 1037 flow [2024-06-14 12:39:00,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 134 transitions, 973 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:00,982 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 655 flow [2024-06-14 12:39:00,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2024-06-14 12:39:00,983 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-14 12:39:00,983 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 655 flow [2024-06-14 12:39:00,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:00,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:00,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:39:00,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:00,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1121484515, now seen corresponding path program 3 times [2024-06-14 12:39:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:00,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991480524] [2024-06-14 12:39:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991480524] [2024-06-14 12:39:01,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991480524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:01,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:01,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530442417] [2024-06-14 12:39:01,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:01,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:01,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:01,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:01,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:01,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:01,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:03,752 INFO L124 PetriNetUnfolderBase]: 14052/19066 cut-off events. [2024-06-14 12:39:03,752 INFO L125 PetriNetUnfolderBase]: For 162168/162214 co-relation queries the response was YES. [2024-06-14 12:39:03,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89164 conditions, 19066 events. 14052/19066 cut-off events. For 162168/162214 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 100832 event pairs, 6352 based on Foata normal form. 28/19086 useless extension candidates. Maximal degree in co-relation 89135. Up to 18502 conditions per place. [2024-06-14 12:39:03,906 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 88 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-14 12:39:03,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 145 transitions, 1307 flow [2024-06-14 12:39:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 12:39:03,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-14 12:39:03,908 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 655 flow. Second operand 7 states and 174 transitions. [2024-06-14 12:39:03,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 145 transitions, 1307 flow [2024-06-14 12:39:03,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 145 transitions, 1239 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:03,954 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 864 flow [2024-06-14 12:39:03,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-14 12:39:03,955 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-14 12:39:03,955 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 864 flow [2024-06-14 12:39:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:03,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:03,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:03,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:39:03,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:03,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1121238251, now seen corresponding path program 1 times [2024-06-14 12:39:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:03,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597660149] [2024-06-14 12:39:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597660149] [2024-06-14 12:39:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597660149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:05,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448328179] [2024-06-14 12:39:05,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:05,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:05,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 864 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:05,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:05,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:06,955 INFO L124 PetriNetUnfolderBase]: 12368/16998 cut-off events. [2024-06-14 12:39:06,955 INFO L125 PetriNetUnfolderBase]: For 164139/164139 co-relation queries the response was YES. [2024-06-14 12:39:07,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83047 conditions, 16998 events. 12368/16998 cut-off events. For 164139/164139 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 90505 event pairs, 5500 based on Foata normal form. 6/17002 useless extension candidates. Maximal degree in co-relation 83015. Up to 16677 conditions per place. [2024-06-14 12:39:07,097 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 120 selfloop transitions, 21 changer transitions 0/146 dead transitions. [2024-06-14 12:39:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1302 flow [2024-06-14 12:39:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 12:39:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254807692307692 [2024-06-14 12:39:07,100 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 864 flow. Second operand 8 states and 177 transitions. [2024-06-14 12:39:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1302 flow [2024-06-14 12:39:07,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 146 transitions, 1153 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:07,195 INFO L231 Difference]: Finished difference. Result has 90 places, 107 transitions, 829 flow [2024-06-14 12:39:07,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=829, PETRI_PLACES=90, PETRI_TRANSITIONS=107} [2024-06-14 12:39:07,195 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-14 12:39:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 107 transitions, 829 flow [2024-06-14 12:39:07,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:07,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:07,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:07,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:39:07,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1021832867, now seen corresponding path program 1 times [2024-06-14 12:39:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:07,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306235163] [2024-06-14 12:39:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:08,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:08,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306235163] [2024-06-14 12:39:08,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306235163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:08,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:08,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556614145] [2024-06-14 12:39:08,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:08,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:08,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:08,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 107 transitions, 829 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:08,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:08,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:09,829 INFO L124 PetriNetUnfolderBase]: 12361/17147 cut-off events. [2024-06-14 12:39:09,829 INFO L125 PetriNetUnfolderBase]: For 166456/166456 co-relation queries the response was YES. [2024-06-14 12:39:09,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82768 conditions, 17147 events. 12361/17147 cut-off events. For 166456/166456 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 92075 event pairs, 5561 based on Foata normal form. 2/17147 useless extension candidates. Maximal degree in co-relation 82735. Up to 16734 conditions per place. [2024-06-14 12:39:09,971 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 110 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-14 12:39:09,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1151 flow [2024-06-14 12:39:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:39:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:39:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-14 12:39:09,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-14 12:39:09,972 INFO L175 Difference]: Start difference. First operand has 90 places, 107 transitions, 829 flow. Second operand 5 states and 110 transitions. [2024-06-14 12:39:09,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1151 flow [2024-06-14 12:39:10,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1067 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:10,046 INFO L231 Difference]: Finished difference. Result has 89 places, 111 transitions, 828 flow [2024-06-14 12:39:10,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=89, PETRI_TRANSITIONS=111} [2024-06-14 12:39:10,047 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-14 12:39:10,047 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 111 transitions, 828 flow [2024-06-14 12:39:10,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:10,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:10,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:10,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:39:10,048 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:10,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1368866048, now seen corresponding path program 1 times [2024-06-14 12:39:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:10,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983353312] [2024-06-14 12:39:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:11,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983353312] [2024-06-14 12:39:11,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983353312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:11,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:11,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:11,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752476390] [2024-06-14 12:39:11,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:11,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:11,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 111 transitions, 828 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:11,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:11,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:11,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:13,151 INFO L124 PetriNetUnfolderBase]: 14021/19016 cut-off events. [2024-06-14 12:39:13,151 INFO L125 PetriNetUnfolderBase]: For 229843/229875 co-relation queries the response was YES. [2024-06-14 12:39:13,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99563 conditions, 19016 events. 14021/19016 cut-off events. For 229843/229875 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 100513 event pairs, 6291 based on Foata normal form. 11/19025 useless extension candidates. Maximal degree in co-relation 99529. Up to 18828 conditions per place. [2024-06-14 12:39:13,305 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 122 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-06-14 12:39:13,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1291 flow [2024-06-14 12:39:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 12:39:13,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-14 12:39:13,307 INFO L175 Difference]: Start difference. First operand has 89 places, 111 transitions, 828 flow. Second operand 7 states and 164 transitions. [2024-06-14 12:39:13,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1291 flow [2024-06-14 12:39:13,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 1238 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:13,396 INFO L231 Difference]: Finished difference. Result has 93 places, 115 transitions, 918 flow [2024-06-14 12:39:13,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=918, PETRI_PLACES=93, PETRI_TRANSITIONS=115} [2024-06-14 12:39:13,397 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-14 12:39:13,397 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 115 transitions, 918 flow [2024-06-14 12:39:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:13,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:13,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:13,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:39:13,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:13,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash 431146546, now seen corresponding path program 1 times [2024-06-14 12:39:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:13,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402654195] [2024-06-14 12:39:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:13,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402654195] [2024-06-14 12:39:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402654195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:14,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362180852] [2024-06-14 12:39:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:14,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 115 transitions, 918 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:16,618 INFO L124 PetriNetUnfolderBase]: 14374/19406 cut-off events. [2024-06-14 12:39:16,618 INFO L125 PetriNetUnfolderBase]: For 245309/245309 co-relation queries the response was YES. [2024-06-14 12:39:16,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100545 conditions, 19406 events. 14374/19406 cut-off events. For 245309/245309 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 99638 event pairs, 6405 based on Foata normal form. 3/19407 useless extension candidates. Maximal degree in co-relation 100510. Up to 19323 conditions per place. [2024-06-14 12:39:16,775 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 137 selfloop transitions, 22 changer transitions 0/163 dead transitions. [2024-06-14 12:39:16,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 163 transitions, 1425 flow [2024-06-14 12:39:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 12:39:16,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-14 12:39:16,777 INFO L175 Difference]: Start difference. First operand has 93 places, 115 transitions, 918 flow. Second operand 8 states and 173 transitions. [2024-06-14 12:39:16,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 163 transitions, 1425 flow [2024-06-14 12:39:16,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 163 transitions, 1341 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:16,883 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 985 flow [2024-06-14 12:39:16,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=985, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-14 12:39:16,883 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-14 12:39:16,884 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 985 flow [2024-06-14 12:39:16,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:39:16,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:16,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash -406273912, now seen corresponding path program 2 times [2024-06-14 12:39:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512038444] [2024-06-14 12:39:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512038444] [2024-06-14 12:39:18,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512038444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:18,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:18,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920259793] [2024-06-14 12:39:18,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:18,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:18,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:18,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:18,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 985 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:18,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:18,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:18,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:20,371 INFO L124 PetriNetUnfolderBase]: 14418/19469 cut-off events. [2024-06-14 12:39:20,371 INFO L125 PetriNetUnfolderBase]: For 267979/267997 co-relation queries the response was YES. [2024-06-14 12:39:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103075 conditions, 19469 events. 14418/19469 cut-off events. For 267979/267997 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 100059 event pairs, 6391 based on Foata normal form. 17/19482 useless extension candidates. Maximal degree in co-relation 103038. Up to 19308 conditions per place. [2024-06-14 12:39:20,551 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 129 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-14 12:39:20,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 169 transitions, 1510 flow [2024-06-14 12:39:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 12:39:20,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2024-06-14 12:39:20,552 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 985 flow. Second operand 8 states and 174 transitions. [2024-06-14 12:39:20,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 169 transitions, 1510 flow [2024-06-14 12:39:20,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1423 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:20,702 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1095 flow [2024-06-14 12:39:20,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2024-06-14 12:39:20,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-14 12:39:20,702 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1095 flow [2024-06-14 12:39:20,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:20,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:20,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:39:20,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:20,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash -406072102, now seen corresponding path program 3 times [2024-06-14 12:39:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707732142] [2024-06-14 12:39:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:22,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707732142] [2024-06-14 12:39:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707732142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:22,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:22,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655096394] [2024-06-14 12:39:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:22,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:22,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1095 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:22,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:22,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:22,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:25,002 INFO L124 PetriNetUnfolderBase]: 14440/19499 cut-off events. [2024-06-14 12:39:25,002 INFO L125 PetriNetUnfolderBase]: For 292994/293012 co-relation queries the response was YES. [2024-06-14 12:39:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105771 conditions, 19499 events. 14440/19499 cut-off events. For 292994/293012 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 100070 event pairs, 6399 based on Foata normal form. 17/19512 useless extension candidates. Maximal degree in co-relation 105732. Up to 19338 conditions per place. [2024-06-14 12:39:25,146 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 132 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-14 12:39:25,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 176 transitions, 1641 flow [2024-06-14 12:39:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 12:39:25,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-14 12:39:25,148 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1095 flow. Second operand 8 states and 173 transitions. [2024-06-14 12:39:25,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 176 transitions, 1641 flow [2024-06-14 12:39:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 176 transitions, 1522 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:25,265 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1179 flow [2024-06-14 12:39:25,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-14 12:39:25,266 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:39:25,266 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1179 flow [2024-06-14 12:39:25,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:25,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:25,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:39:25,266 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:25,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash -406064662, now seen corresponding path program 4 times [2024-06-14 12:39:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036329343] [2024-06-14 12:39:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:26,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:26,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036329343] [2024-06-14 12:39:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036329343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:26,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:26,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135240566] [2024-06-14 12:39:26,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:26,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:26,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:26,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:26,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:26,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:28,924 INFO L124 PetriNetUnfolderBase]: 14419/19474 cut-off events. [2024-06-14 12:39:28,924 INFO L125 PetriNetUnfolderBase]: For 315537/315551 co-relation queries the response was YES. [2024-06-14 12:39:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107070 conditions, 19474 events. 14419/19474 cut-off events. For 315537/315551 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 100030 event pairs, 6130 based on Foata normal form. 11/19477 useless extension candidates. Maximal degree in co-relation 107030. Up to 18830 conditions per place. [2024-06-14 12:39:29,056 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 107 selfloop transitions, 93 changer transitions 0/204 dead transitions. [2024-06-14 12:39:29,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 204 transitions, 1982 flow [2024-06-14 12:39:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 12:39:29,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44471153846153844 [2024-06-14 12:39:29,057 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1179 flow. Second operand 8 states and 185 transitions. [2024-06-14 12:39:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 204 transitions, 1982 flow [2024-06-14 12:39:29,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 204 transitions, 1873 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:29,216 INFO L231 Difference]: Finished difference. Result has 109 places, 160 transitions, 1494 flow [2024-06-14 12:39:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1494, PETRI_PLACES=109, PETRI_TRANSITIONS=160} [2024-06-14 12:39:29,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-14 12:39:29,217 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 160 transitions, 1494 flow [2024-06-14 12:39:29,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:29,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:29,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:39:29,217 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:29,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1612049309, now seen corresponding path program 1 times [2024-06-14 12:39:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:29,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100434467] [2024-06-14 12:39:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:29,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100434467] [2024-06-14 12:39:29,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100434467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:29,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:29,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029274684] [2024-06-14 12:39:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:30,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:30,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 160 transitions, 1494 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:30,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:30,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:30,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:32,303 INFO L124 PetriNetUnfolderBase]: 12393/17203 cut-off events. [2024-06-14 12:39:32,303 INFO L125 PetriNetUnfolderBase]: For 285899/285899 co-relation queries the response was YES. [2024-06-14 12:39:32,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96366 conditions, 17203 events. 12393/17203 cut-off events. For 285899/285899 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 92529 event pairs, 5088 based on Foata normal form. 8/17208 useless extension candidates. Maximal degree in co-relation 96324. Up to 16686 conditions per place. [2024-06-14 12:39:32,444 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 172 selfloop transitions, 22 changer transitions 0/199 dead transitions. [2024-06-14 12:39:32,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 2150 flow [2024-06-14 12:39:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 12:39:32,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-14 12:39:32,449 INFO L175 Difference]: Start difference. First operand has 109 places, 160 transitions, 1494 flow. Second operand 6 states and 139 transitions. [2024-06-14 12:39:32,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 2150 flow [2024-06-14 12:39:32,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 199 transitions, 2070 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:32,656 INFO L231 Difference]: Finished difference. Result has 115 places, 174 transitions, 1638 flow [2024-06-14 12:39:32,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1638, PETRI_PLACES=115, PETRI_TRANSITIONS=174} [2024-06-14 12:39:32,657 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-14 12:39:32,657 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 174 transitions, 1638 flow [2024-06-14 12:39:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:39:32,657 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:32,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash 362310160, now seen corresponding path program 1 times [2024-06-14 12:39:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:32,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705293357] [2024-06-14 12:39:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:33,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:33,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705293357] [2024-06-14 12:39:33,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705293357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:33,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:33,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118949899] [2024-06-14 12:39:33,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:33,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:33,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:33,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:33,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 174 transitions, 1638 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:33,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:33,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:33,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:36,520 INFO L124 PetriNetUnfolderBase]: 13921/18990 cut-off events. [2024-06-14 12:39:36,520 INFO L125 PetriNetUnfolderBase]: For 389110/389110 co-relation queries the response was YES. [2024-06-14 12:39:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114402 conditions, 18990 events. 13921/18990 cut-off events. For 389110/389110 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 100823 event pairs, 4892 based on Foata normal form. 6/18994 useless extension candidates. Maximal degree in co-relation 114356. Up to 18722 conditions per place. [2024-06-14 12:39:36,663 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 191 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2024-06-14 12:39:36,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 223 transitions, 2254 flow [2024-06-14 12:39:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 12:39:36,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-14 12:39:36,665 INFO L175 Difference]: Start difference. First operand has 115 places, 174 transitions, 1638 flow. Second operand 8 states and 184 transitions. [2024-06-14 12:39:36,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 223 transitions, 2254 flow [2024-06-14 12:39:37,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 223 transitions, 2208 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-14 12:39:37,082 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 1724 flow [2024-06-14 12:39:37,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2024-06-14 12:39:37,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-14 12:39:37,083 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 1724 flow [2024-06-14 12:39:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:37,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:37,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:37,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:39:37,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:37,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -434954456, now seen corresponding path program 2 times [2024-06-14 12:39:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340038478] [2024-06-14 12:39:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340038478] [2024-06-14 12:39:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340038478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:38,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50837816] [2024-06-14 12:39:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:38,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-14 12:39:38,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 1724 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:38,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:38,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-14 12:39:38,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:41,142 INFO L124 PetriNetUnfolderBase]: 13985/19086 cut-off events. [2024-06-14 12:39:41,142 INFO L125 PetriNetUnfolderBase]: For 435427/435427 co-relation queries the response was YES. [2024-06-14 12:39:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118714 conditions, 19086 events. 13985/19086 cut-off events. For 435427/435427 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 101378 event pairs, 5515 based on Foata normal form. 12/19096 useless extension candidates. Maximal degree in co-relation 118665. Up to 18769 conditions per place. [2024-06-14 12:39:41,292 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 183 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2024-06-14 12:39:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 226 transitions, 2354 flow [2024-06-14 12:39:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 12:39:41,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44471153846153844 [2024-06-14 12:39:41,294 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 1724 flow. Second operand 8 states and 185 transitions. [2024-06-14 12:39:41,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 226 transitions, 2354 flow [2024-06-14 12:39:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 226 transitions, 2248 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:41,562 INFO L231 Difference]: Finished difference. Result has 124 places, 180 transitions, 1781 flow [2024-06-14 12:39:41,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1781, PETRI_PLACES=124, PETRI_TRANSITIONS=180} [2024-06-14 12:39:41,563 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-14 12:39:41,563 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 180 transitions, 1781 flow [2024-06-14 12:39:41,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:41,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:41,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:39:41,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:41,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1671360120, now seen corresponding path program 1 times [2024-06-14 12:39:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595566977] [2024-06-14 12:39:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595566977] [2024-06-14 12:39:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595566977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446810046] [2024-06-14 12:39:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:42,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:42,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 180 transitions, 1781 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:42,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:42,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:42,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:45,618 INFO L124 PetriNetUnfolderBase]: 14653/19794 cut-off events. [2024-06-14 12:39:45,618 INFO L125 PetriNetUnfolderBase]: For 477649/477649 co-relation queries the response was YES. [2024-06-14 12:39:45,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123627 conditions, 19794 events. 14653/19794 cut-off events. For 477649/477649 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 101618 event pairs, 5790 based on Foata normal form. 6/19798 useless extension candidates. Maximal degree in co-relation 123577. Up to 19608 conditions per place. [2024-06-14 12:39:45,769 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 205 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-14 12:39:45,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 239 transitions, 2488 flow [2024-06-14 12:39:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 12:39:45,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-06-14 12:39:45,771 INFO L175 Difference]: Start difference. First operand has 124 places, 180 transitions, 1781 flow. Second operand 9 states and 200 transitions. [2024-06-14 12:39:45,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 239 transitions, 2488 flow [2024-06-14 12:39:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 239 transitions, 2357 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:46,087 INFO L231 Difference]: Finished difference. Result has 128 places, 185 transitions, 1829 flow [2024-06-14 12:39:46,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1829, PETRI_PLACES=128, PETRI_TRANSITIONS=185} [2024-06-14 12:39:46,088 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-14 12:39:46,088 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 185 transitions, 1829 flow [2024-06-14 12:39:46,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:46,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:46,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:46,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:39:46,089 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:39:46,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1666891470, now seen corresponding path program 2 times [2024-06-14 12:39:46,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:46,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552525296] [2024-06-14 12:39:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:46,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552525296] [2024-06-14 12:39:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552525296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:47,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396560534] [2024-06-14 12:39:47,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:47,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-14 12:39:47,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 185 transitions, 1829 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:47,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:47,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-14 12:39:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand