./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe006_power.oepc-thin000_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe006_power.oepc-thin000_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe006_power.oepc-thin000_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:34:28,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:34:28,164 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:34:28,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:34:28,169 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:34:28,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:34:28,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:34:28,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:34:28,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:34:28,195 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:34:28,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:34:28,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:34:28,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:34:28,199 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:34:28,199 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:34:28,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:34:28,200 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:34:28,200 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:34:28,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:34:28,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:34:28,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:34:28,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:34:28,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:34:28,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:34:28,202 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:34:28,202 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:34:28,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:34:28,203 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:34:28,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:34:28,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:34:28,204 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:34:28,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:34:28,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:34:28,205 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:34:28,205 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:34:28,205 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:34:28,205 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:34:28,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:34:28,206 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:34:28,206 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:34:28,206 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:34:28,206 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:34:28,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:34:28,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:34:28,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:34:28,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:34:28,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:34:28,455 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:34:28,455 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:34:28,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i [2024-06-21 21:34:29,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:34:29,776 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:34:29,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i [2024-06-21 21:34:29,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2362b18e4/be59501aab354427a02388f32d08d1ef/FLAG9071b80a1 [2024-06-21 21:34:29,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2362b18e4/be59501aab354427a02388f32d08d1ef [2024-06-21 21:34:29,806 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:34:29,806 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:34:29,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe006_power.oepc-thin000_power.oepc.yml/witness.yml [2024-06-21 21:34:30,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:34:30,027 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:34:30,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:34:30,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:34:30,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:34:30,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:34:29" (1/2) ... [2024-06-21 21:34:30,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556c2cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:34:30, skipping insertion in model container [2024-06-21 21:34:30,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:34:29" (1/2) ... [2024-06-21 21:34:30,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a483320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:34:30, skipping insertion in model container [2024-06-21 21:34:30,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:34:30" (2/2) ... [2024-06-21 21:34:30,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556c2cb0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30, skipping insertion in model container [2024-06-21 21:34:30,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:34:30" (2/2) ... [2024-06-21 21:34:30,036 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:34:30,104 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:34:30,105 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0) [2024-06-21 21:34:30,105 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] (((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0) [2024-06-21 21:34:30,105 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:34:30,105 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-21 21:34:30,138 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:34:30,437 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:34:30,447 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:34:30,538 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:34:30,580 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:34:30,581 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30 WrapperNode [2024-06-21 21:34:30,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:34:30,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:34:30,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:34:30,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:34:30,588 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 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,617 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 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,651 INFO L138 Inliner]: procedures = 174, calls = 65, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 170 [2024-06-21 21:34:30,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:34:30,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:34:30,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:34:30,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:34:30,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,676 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,694 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 21:34:30,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:34:30,728 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:34:30,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:34:30,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:34:30,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (1/1) ... [2024-06-21 21:34:30,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:34:30,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:34:30,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:34:30,782 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 [2024-06-21 21:34:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:34:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:34:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:34:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:34:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:34:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:34:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:34:30,797 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:34:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:34:30,797 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:34:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:34:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:34:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:34:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:34:30,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:34:30,800 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:34:30,941 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:34:30,944 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:34:31,278 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:34:31,278 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:34:31,572 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:34:31,573 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:34:31,573 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:34:31 BoogieIcfgContainer [2024-06-21 21:34:31,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:34:31,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:34:31,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:34:31,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:34:31,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:34:29" (1/4) ... [2024-06-21 21:34:31,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed53c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:34:31, skipping insertion in model container [2024-06-21 21:34:31,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:34:30" (2/4) ... [2024-06-21 21:34:31,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed53c6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:34:31, skipping insertion in model container [2024-06-21 21:34:31,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:34:30" (3/4) ... [2024-06-21 21:34:31,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed53c6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:34:31, skipping insertion in model container [2024-06-21 21:34:31,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:34:31" (4/4) ... [2024-06-21 21:34:31,579 INFO L112 eAbstractionObserver]: Analyzing ICFG safe006_power.oepc-thin000_power.oepc.i [2024-06-21 21:34:31,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:34:31,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:34:31,594 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:34:31,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:34:31,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 21:34:31,684 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-21 21:34:31,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:34:31,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:34:31,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 21:34:31,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-21 21:34:31,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:34:31,706 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;@76f7fe91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:34:31,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:34:31,712 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:34:31,712 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:34:31,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:34:31,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:31,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:34:31,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:31,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash 637192102, now seen corresponding path program 1 times [2024-06-21 21:34:31,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144307146] [2024-06-21 21:34:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:31,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:33,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144307146] [2024-06-21 21:34:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144307146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:33,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:34:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990736227] [2024-06-21 21:34:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:33,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:34:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:34:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:34:33,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 21:34:33,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:33,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:33,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 21:34:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:33,389 INFO L124 PetriNetUnfolderBase]: 113/223 cut-off events. [2024-06-21 21:34:33,390 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 21:34:33,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 223 events. 113/223 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 792 event pairs, 61 based on Foata normal form. 1/218 useless extension candidates. Maximal degree in co-relation 440. Up to 206 conditions per place. [2024-06-21 21:34:33,393 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 21:34:33,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 115 flow [2024-06-21 21:34:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:34:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:34:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-21 21:34:33,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-21 21:34:33,403 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 47 transitions. [2024-06-21 21:34:33,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 115 flow [2024-06-21 21:34:33,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:34:33,406 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-21 21:34:33,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-21 21:34:33,410 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-21 21:34:33,410 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-21 21:34:33,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:33,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:33,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:33,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:34:33,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:33,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1838498695, now seen corresponding path program 1 times [2024-06-21 21:34:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:33,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929699007] [2024-06-21 21:34:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:35,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929699007] [2024-06-21 21:34:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929699007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:35,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:35,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:34:35,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147044808] [2024-06-21 21:34:35,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:35,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:34:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:34:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:34:35,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 21:34:35,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:35,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:35,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 21:34:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:35,649 INFO L124 PetriNetUnfolderBase]: 110/217 cut-off events. [2024-06-21 21:34:35,649 INFO L125 PetriNetUnfolderBase]: For 44/47 co-relation queries the response was YES. [2024-06-21 21:34:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 217 events. 110/217 cut-off events. For 44/47 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 751 event pairs, 46 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 494. Up to 190 conditions per place. [2024-06-21 21:34:35,651 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 21:34:35,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 161 flow [2024-06-21 21:34:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:34:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:34:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-06-21 21:34:35,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 21:34:35,652 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 61 transitions. [2024-06-21 21:34:35,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 161 flow [2024-06-21 21:34:35,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:34:35,654 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-21 21:34:35,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-21 21:34:35,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-21 21:34:35,655 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-21 21:34:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:35,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:35,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:34:35,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:35,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1158883335, now seen corresponding path program 1 times [2024-06-21 21:34:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:35,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993123912] [2024-06-21 21:34:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993123912] [2024-06-21 21:34:37,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993123912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:37,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:37,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:34:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590622123] [2024-06-21 21:34:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:34:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:34:37,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:34:37,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 21:34:37,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:37,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:37,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 21:34:37,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:37,692 INFO L124 PetriNetUnfolderBase]: 125/242 cut-off events. [2024-06-21 21:34:37,692 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-21 21:34:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 242 events. 125/242 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 833 event pairs, 37 based on Foata normal form. 2/243 useless extension candidates. Maximal degree in co-relation 618. Up to 205 conditions per place. [2024-06-21 21:34:37,694 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-06-21 21:34:37,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 235 flow [2024-06-21 21:34:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:34:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:34:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-21 21:34:37,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-21 21:34:37,696 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 5 states and 71 transitions. [2024-06-21 21:34:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 235 flow [2024-06-21 21:34:37,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 224 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:34:37,697 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 137 flow [2024-06-21 21:34:37,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-06-21 21:34:37,698 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-21 21:34:37,698 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 137 flow [2024-06-21 21:34:37,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:37,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:37,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:37,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:34:37,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:37,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2146376748, now seen corresponding path program 1 times [2024-06-21 21:34:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:37,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099171999] [2024-06-21 21:34:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099171999] [2024-06-21 21:34:39,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099171999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:39,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:39,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:34:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533527072] [2024-06-21 21:34:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:34:39,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:34:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:34:39,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 21:34:39,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:39,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:39,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 21:34:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:39,949 INFO L124 PetriNetUnfolderBase]: 121/234 cut-off events. [2024-06-21 21:34:39,949 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-06-21 21:34:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 234 events. 121/234 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 800 event pairs, 18 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 674. Up to 175 conditions per place. [2024-06-21 21:34:39,951 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 21:34:39,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 257 flow [2024-06-21 21:34:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:34:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:34:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-21 21:34:39,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:34:39,953 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 137 flow. Second operand 6 states and 78 transitions. [2024-06-21 21:34:39,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 257 flow [2024-06-21 21:34:39,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 21:34:39,955 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 149 flow [2024-06-21 21:34:39,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-06-21 21:34:39,955 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-21 21:34:39,956 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 149 flow [2024-06-21 21:34:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:39,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:34:39,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:39,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash -63221280, now seen corresponding path program 1 times [2024-06-21 21:34:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947642540] [2024-06-21 21:34:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947642540] [2024-06-21 21:34:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947642540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:41,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:34:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211775903] [2024-06-21 21:34:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:41,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:34:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:34:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:34:41,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:41,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:41,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:41,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:41,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:41,777 INFO L124 PetriNetUnfolderBase]: 117/228 cut-off events. [2024-06-21 21:34:41,777 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-06-21 21:34:41,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 228 events. 117/228 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 778 event pairs, 32 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 707. Up to 204 conditions per place. [2024-06-21 21:34:41,779 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 21:34:41,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 245 flow [2024-06-21 21:34:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:34:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:34:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-06-21 21:34:41,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-21 21:34:41,781 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 149 flow. Second operand 5 states and 56 transitions. [2024-06-21 21:34:41,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 245 flow [2024-06-21 21:34:41,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 224 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:41,783 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 157 flow [2024-06-21 21:34:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-06-21 21:34:41,783 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-21 21:34:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 157 flow [2024-06-21 21:34:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:41,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:41,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:34:41,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:41,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -803568571, now seen corresponding path program 1 times [2024-06-21 21:34:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:41,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258603326] [2024-06-21 21:34:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258603326] [2024-06-21 21:34:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258603326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:44,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:44,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088463627] [2024-06-21 21:34:44,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:44,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:44,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:44,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:44,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:44,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:44,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:44,825 INFO L124 PetriNetUnfolderBase]: 120/235 cut-off events. [2024-06-21 21:34:44,825 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2024-06-21 21:34:44,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 235 events. 120/235 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 815 event pairs, 31 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 748. Up to 181 conditions per place. [2024-06-21 21:34:44,830 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2024-06-21 21:34:44,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 329 flow [2024-06-21 21:34:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 21:34:44,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:34:44,833 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 157 flow. Second operand 7 states and 82 transitions. [2024-06-21 21:34:44,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 329 flow [2024-06-21 21:34:44,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 316 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:44,842 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 201 flow [2024-06-21 21:34:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=201, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-06-21 21:34:44,845 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2024-06-21 21:34:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 201 flow [2024-06-21 21:34:44,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:44,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:44,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:44,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:34:44,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:44,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash -803448601, now seen corresponding path program 2 times [2024-06-21 21:34:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189468985] [2024-06-21 21:34:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:47,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:47,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189468985] [2024-06-21 21:34:47,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189468985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:47,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:47,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631859474] [2024-06-21 21:34:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:47,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:47,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:47,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 201 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:47,750 INFO L124 PetriNetUnfolderBase]: 126/247 cut-off events. [2024-06-21 21:34:47,750 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2024-06-21 21:34:47,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 247 events. 126/247 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 866 event pairs, 31 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 853. Up to 205 conditions per place. [2024-06-21 21:34:47,752 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2024-06-21 21:34:47,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 357 flow [2024-06-21 21:34:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 21:34:47,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 21:34:47,754 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 201 flow. Second operand 7 states and 76 transitions. [2024-06-21 21:34:47,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 357 flow [2024-06-21 21:34:47,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 338 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:47,756 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 245 flow [2024-06-21 21:34:47,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-06-21 21:34:47,757 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-21 21:34:47,757 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 245 flow [2024-06-21 21:34:47,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:47,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:34:47,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:47,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash -803448415, now seen corresponding path program 1 times [2024-06-21 21:34:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411428575] [2024-06-21 21:34:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411428575] [2024-06-21 21:34:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411428575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:49,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:49,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752533885] [2024-06-21 21:34:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:49,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:49,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:49,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:49,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:50,406 INFO L124 PetriNetUnfolderBase]: 142/273 cut-off events. [2024-06-21 21:34:50,407 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-06-21 21:34:50,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 273 events. 142/273 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 972 event pairs, 33 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 981. Up to 219 conditions per place. [2024-06-21 21:34:50,409 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 43 selfloop transitions, 15 changer transitions 0/61 dead transitions. [2024-06-21 21:34:50,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 427 flow [2024-06-21 21:34:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:34:50,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-21 21:34:50,414 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 245 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:34:50,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 427 flow [2024-06-21 21:34:50,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 398 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:50,418 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 271 flow [2024-06-21 21:34:50,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-06-21 21:34:50,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-21 21:34:50,420 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 271 flow [2024-06-21 21:34:50,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:50,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:50,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:50,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:34:50,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:50,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 229226909, now seen corresponding path program 2 times [2024-06-21 21:34:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:50,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628809848] [2024-06-21 21:34:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:52,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:52,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628809848] [2024-06-21 21:34:52,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628809848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:52,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:52,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:52,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023993313] [2024-06-21 21:34:52,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:52,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:52,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:52,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:52,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 271 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:52,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:52,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:52,953 INFO L124 PetriNetUnfolderBase]: 138/268 cut-off events. [2024-06-21 21:34:52,953 INFO L125 PetriNetUnfolderBase]: For 1038/1041 co-relation queries the response was YES. [2024-06-21 21:34:52,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 268 events. 138/268 cut-off events. For 1038/1041 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 951 event pairs, 30 based on Foata normal form. 4/270 useless extension candidates. Maximal degree in co-relation 1008. Up to 199 conditions per place. [2024-06-21 21:34:52,955 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 37 selfloop transitions, 20 changer transitions 0/60 dead transitions. [2024-06-21 21:34:52,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 460 flow [2024-06-21 21:34:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 21:34:52,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2024-06-21 21:34:52,973 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 271 flow. Second operand 8 states and 83 transitions. [2024-06-21 21:34:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 460 flow [2024-06-21 21:34:52,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 438 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:52,977 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 330 flow [2024-06-21 21:34:52,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-06-21 21:34:52,979 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-21 21:34:52,979 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 330 flow [2024-06-21 21:34:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:52,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:52,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:34:52,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:52,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash -626316895, now seen corresponding path program 3 times [2024-06-21 21:34:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:52,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668516511] [2024-06-21 21:34:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668516511] [2024-06-21 21:34:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668516511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121790229] [2024-06-21 21:34:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:54,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:54,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:54,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:55,482 INFO L124 PetriNetUnfolderBase]: 134/261 cut-off events. [2024-06-21 21:34:55,482 INFO L125 PetriNetUnfolderBase]: For 1105/1105 co-relation queries the response was YES. [2024-06-21 21:34:55,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 261 events. 134/261 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 914 event pairs, 31 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1050. Up to 210 conditions per place. [2024-06-21 21:34:55,484 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 42 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2024-06-21 21:34:55,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 473 flow [2024-06-21 21:34:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:34:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:34:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 21:34:55,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 21:34:55,486 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 330 flow. Second operand 6 states and 69 transitions. [2024-06-21 21:34:55,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 473 flow [2024-06-21 21:34:55,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 432 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:55,489 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 327 flow [2024-06-21 21:34:55,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-06-21 21:34:55,490 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2024-06-21 21:34:55,491 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 327 flow [2024-06-21 21:34:55,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:55,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:55,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:34:55,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:55,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 228989573, now seen corresponding path program 3 times [2024-06-21 21:34:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:55,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067698338] [2024-06-21 21:34:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067698338] [2024-06-21 21:34:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067698338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479549555] [2024-06-21 21:34:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:57,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:57,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:34:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:34:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:58,386 INFO L124 PetriNetUnfolderBase]: 132/258 cut-off events. [2024-06-21 21:34:58,386 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2024-06-21 21:34:58,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 258 events. 132/258 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 900 event pairs, 31 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 1030. Up to 202 conditions per place. [2024-06-21 21:34:58,388 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 43 selfloop transitions, 17 changer transitions 0/63 dead transitions. [2024-06-21 21:34:58,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 486 flow [2024-06-21 21:34:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:34:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:34:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-06-21 21:34:58,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 21:34:58,389 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 327 flow. Second operand 6 states and 73 transitions. [2024-06-21 21:34:58,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 486 flow [2024-06-21 21:34:58,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 447 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:58,392 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 334 flow [2024-06-21 21:34:58,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-06-21 21:34:58,393 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2024-06-21 21:34:58,393 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 334 flow [2024-06-21 21:34:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:58,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:34:58,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:34:58,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash 229235837, now seen corresponding path program 1 times [2024-06-21 21:34:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611340613] [2024-06-21 21:34:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611340613] [2024-06-21 21:35:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611340613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:00,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655127846] [2024-06-21 21:35:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:00,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:00,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 334 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:00,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:00,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:00,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:00,988 INFO L124 PetriNetUnfolderBase]: 129/253 cut-off events. [2024-06-21 21:35:00,988 INFO L125 PetriNetUnfolderBase]: For 1191/1191 co-relation queries the response was YES. [2024-06-21 21:35:00,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 253 events. 129/253 cut-off events. For 1191/1191 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 886 event pairs, 28 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 1006. Up to 219 conditions per place. [2024-06-21 21:35:00,991 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 47 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-21 21:35:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 467 flow [2024-06-21 21:35:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-06-21 21:35:00,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 21:35:00,992 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 334 flow. Second operand 6 states and 63 transitions. [2024-06-21 21:35:00,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 467 flow [2024-06-21 21:35:00,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 431 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:00,997 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 318 flow [2024-06-21 21:35:00,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-21 21:35:00,998 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-06-21 21:35:00,998 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 318 flow [2024-06-21 21:35:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:00,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:00,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:35:00,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:00,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 859179203, now seen corresponding path program 1 times [2024-06-21 21:35:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202867027] [2024-06-21 21:35:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:01,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:03,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:03,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202867027] [2024-06-21 21:35:03,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202867027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:03,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:03,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710779749] [2024-06-21 21:35:03,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:03,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:03,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:03,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:03,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:03,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 318 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:03,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:03,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:03,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:04,242 INFO L124 PetriNetUnfolderBase]: 145/287 cut-off events. [2024-06-21 21:35:04,243 INFO L125 PetriNetUnfolderBase]: For 1275/1275 co-relation queries the response was YES. [2024-06-21 21:35:04,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 287 events. 145/287 cut-off events. For 1275/1275 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1072 event pairs, 31 based on Foata normal form. 2/288 useless extension candidates. Maximal degree in co-relation 1105. Up to 183 conditions per place. [2024-06-21 21:35:04,244 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 45 selfloop transitions, 27 changer transitions 0/75 dead transitions. [2024-06-21 21:35:04,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 565 flow [2024-06-21 21:35:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:35:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:35:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:35:04,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2024-06-21 21:35:04,246 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 318 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:35:04,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 565 flow [2024-06-21 21:35:04,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 547 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:04,249 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 391 flow [2024-06-21 21:35:04,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-06-21 21:35:04,250 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-21 21:35:04,250 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 391 flow [2024-06-21 21:35:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:04,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:04,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:35:04,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:04,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash 862903853, now seen corresponding path program 2 times [2024-06-21 21:35:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906543446] [2024-06-21 21:35:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:06,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:06,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906543446] [2024-06-21 21:35:06,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906543446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:06,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:06,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174301486] [2024-06-21 21:35:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:06,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:06,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 391 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:06,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:06,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:06,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:07,291 INFO L124 PetriNetUnfolderBase]: 161/315 cut-off events. [2024-06-21 21:35:07,295 INFO L125 PetriNetUnfolderBase]: For 1774/1774 co-relation queries the response was YES. [2024-06-21 21:35:07,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 315 events. 161/315 cut-off events. For 1774/1774 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1211 event pairs, 33 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1321. Up to 234 conditions per place. [2024-06-21 21:35:07,315 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 52 selfloop transitions, 22 changer transitions 0/77 dead transitions. [2024-06-21 21:35:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 644 flow [2024-06-21 21:35:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:35:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:35:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 21:35:07,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-06-21 21:35:07,317 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 391 flow. Second operand 11 states and 113 transitions. [2024-06-21 21:35:07,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 644 flow [2024-06-21 21:35:07,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 589 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:07,322 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 425 flow [2024-06-21 21:35:07,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=425, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2024-06-21 21:35:07,323 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-21 21:35:07,329 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 425 flow [2024-06-21 21:35:07,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:07,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:07,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:07,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:35:07,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:07,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2127325811, now seen corresponding path program 3 times [2024-06-21 21:35:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:07,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18450648] [2024-06-21 21:35:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:07,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18450648] [2024-06-21 21:35:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18450648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600220455] [2024-06-21 21:35:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:09,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:09,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 425 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:09,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:09,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:09,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:10,369 INFO L124 PetriNetUnfolderBase]: 157/309 cut-off events. [2024-06-21 21:35:10,369 INFO L125 PetriNetUnfolderBase]: For 1842/1842 co-relation queries the response was YES. [2024-06-21 21:35:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 309 events. 157/309 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1183 event pairs, 32 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 1305. Up to 231 conditions per place. [2024-06-21 21:35:10,371 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 22 changer transitions 0/75 dead transitions. [2024-06-21 21:35:10,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 612 flow [2024-06-21 21:35:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:35:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:35:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 21:35:10,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 21:35:10,373 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 425 flow. Second operand 10 states and 105 transitions. [2024-06-21 21:35:10,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 612 flow [2024-06-21 21:35:10,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 575 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:10,376 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 437 flow [2024-06-21 21:35:10,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=437, PETRI_PLACES=77, PETRI_TRANSITIONS=57} [2024-06-21 21:35:10,377 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-21 21:35:10,377 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 437 flow [2024-06-21 21:35:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:10,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:10,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:10,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:35:10,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:10,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1483899471, now seen corresponding path program 4 times [2024-06-21 21:35:10,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:10,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467983670] [2024-06-21 21:35:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:10,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467983670] [2024-06-21 21:35:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467983670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:12,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926768015] [2024-06-21 21:35:12,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:12,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:12,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:12,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 57 transitions, 437 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:12,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:12,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:12,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:13,372 INFO L124 PetriNetUnfolderBase]: 153/304 cut-off events. [2024-06-21 21:35:13,373 INFO L125 PetriNetUnfolderBase]: For 1999/2002 co-relation queries the response was YES. [2024-06-21 21:35:13,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 304 events. 153/304 cut-off events. For 1999/2002 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1161 event pairs, 33 based on Foata normal form. 4/306 useless extension candidates. Maximal degree in co-relation 1304. Up to 176 conditions per place. [2024-06-21 21:35:13,375 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 43 selfloop transitions, 31 changer transitions 0/77 dead transitions. [2024-06-21 21:35:13,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 671 flow [2024-06-21 21:35:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 21:35:13,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:35:13,377 INFO L175 Difference]: Start difference. First operand has 77 places, 57 transitions, 437 flow. Second operand 9 states and 99 transitions. [2024-06-21 21:35:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 671 flow [2024-06-21 21:35:13,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 627 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 21:35:13,382 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 482 flow [2024-06-21 21:35:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-06-21 21:35:13,383 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-21 21:35:13,383 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 482 flow [2024-06-21 21:35:13,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:13,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:13,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:35:13,383 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1706282613, now seen corresponding path program 5 times [2024-06-21 21:35:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602186506] [2024-06-21 21:35:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602186506] [2024-06-21 21:35:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602186506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:15,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861068332] [2024-06-21 21:35:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:15,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:15,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 482 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:15,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:15,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:15,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:16,433 INFO L124 PetriNetUnfolderBase]: 159/315 cut-off events. [2024-06-21 21:35:16,434 INFO L125 PetriNetUnfolderBase]: For 2267/2267 co-relation queries the response was YES. [2024-06-21 21:35:16,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 315 events. 159/315 cut-off events. For 2267/2267 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1218 event pairs, 30 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1414. Up to 204 conditions per place. [2024-06-21 21:35:16,436 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 29 changer transitions 0/82 dead transitions. [2024-06-21 21:35:16,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 743 flow [2024-06-21 21:35:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 21:35:16,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2024-06-21 21:35:16,438 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 482 flow. Second operand 9 states and 101 transitions. [2024-06-21 21:35:16,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 743 flow [2024-06-21 21:35:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 666 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:16,446 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 493 flow [2024-06-21 21:35:16,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=493, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-21 21:35:16,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-06-21 21:35:16,448 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 493 flow [2024-06-21 21:35:16,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:16,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:16,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:35:16,448 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:16,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1706277033, now seen corresponding path program 6 times [2024-06-21 21:35:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:16,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166260086] [2024-06-21 21:35:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:18,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:18,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166260086] [2024-06-21 21:35:18,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166260086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:18,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:18,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:18,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377760009] [2024-06-21 21:35:18,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:18,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:18,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:18,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:18,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:18,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:19,533 INFO L124 PetriNetUnfolderBase]: 155/309 cut-off events. [2024-06-21 21:35:19,533 INFO L125 PetriNetUnfolderBase]: For 2230/2230 co-relation queries the response was YES. [2024-06-21 21:35:19,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 309 events. 155/309 cut-off events. For 2230/2230 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1199 event pairs, 30 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 1361. Up to 201 conditions per place. [2024-06-21 21:35:19,535 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2024-06-21 21:35:19,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 79 transitions, 692 flow [2024-06-21 21:35:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 21:35:19,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 21:35:19,538 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 493 flow. Second operand 8 states and 92 transitions. [2024-06-21 21:35:19,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 79 transitions, 692 flow [2024-06-21 21:35:19,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 617 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:35:19,543 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 484 flow [2024-06-21 21:35:19,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=484, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-21 21:35:19,543 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-06-21 21:35:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 484 flow [2024-06-21 21:35:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:19,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:19,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:35:19,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1811730108, now seen corresponding path program 1 times [2024-06-21 21:35:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563270590] [2024-06-21 21:35:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563270590] [2024-06-21 21:35:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563270590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:22,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860405735] [2024-06-21 21:35:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:22,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:22,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:22,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:22,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 484 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:22,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:22,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:22,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:22,894 INFO L124 PetriNetUnfolderBase]: 159/317 cut-off events. [2024-06-21 21:35:22,895 INFO L125 PetriNetUnfolderBase]: For 2231/2231 co-relation queries the response was YES. [2024-06-21 21:35:22,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 317 events. 159/317 cut-off events. For 2231/2231 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1245 event pairs, 18 based on Foata normal form. 2/318 useless extension candidates. Maximal degree in co-relation 1379. Up to 203 conditions per place. [2024-06-21 21:35:22,897 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 57 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-21 21:35:22,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 81 transitions, 727 flow [2024-06-21 21:35:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:35:22,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-21 21:35:22,898 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 484 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:35:22,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 81 transitions, 727 flow [2024-06-21 21:35:22,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 662 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:35:22,903 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 475 flow [2024-06-21 21:35:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=475, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-06-21 21:35:22,903 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-06-21 21:35:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 475 flow [2024-06-21 21:35:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:35:22,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:22,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 975570236, now seen corresponding path program 2 times [2024-06-21 21:35:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067452716] [2024-06-21 21:35:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067452716] [2024-06-21 21:35:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067452716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:25,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399924311] [2024-06-21 21:35:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:25,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 475 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:25,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:25,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:26,290 INFO L124 PetriNetUnfolderBase]: 163/325 cut-off events. [2024-06-21 21:35:26,290 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-21 21:35:26,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 325 events. 163/325 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1287 event pairs, 32 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 1389. Up to 248 conditions per place. [2024-06-21 21:35:26,292 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 57 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-06-21 21:35:26,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 684 flow [2024-06-21 21:35:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:35:26,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-21 21:35:26,293 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 475 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:35:26,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 684 flow [2024-06-21 21:35:26,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 639 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:26,298 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 486 flow [2024-06-21 21:35:26,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-21 21:35:26,298 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-06-21 21:35:26,298 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 486 flow [2024-06-21 21:35:26,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:26,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:26,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:26,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:35:26,299 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:26,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash 980038886, now seen corresponding path program 3 times [2024-06-21 21:35:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:26,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305711014] [2024-06-21 21:35:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:26,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305711014] [2024-06-21 21:35:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305711014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:28,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:28,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:28,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331741028] [2024-06-21 21:35:28,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:28,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:28,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 486 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:28,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:28,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:28,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:29,387 INFO L124 PetriNetUnfolderBase]: 167/333 cut-off events. [2024-06-21 21:35:29,387 INFO L125 PetriNetUnfolderBase]: For 2505/2505 co-relation queries the response was YES. [2024-06-21 21:35:29,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 333 events. 167/333 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1341 event pairs, 32 based on Foata normal form. 2/334 useless extension candidates. Maximal degree in co-relation 1423. Up to 273 conditions per place. [2024-06-21 21:35:29,389 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 59 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-21 21:35:29,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 676 flow [2024-06-21 21:35:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 21:35:29,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 21:35:29,391 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 486 flow. Second operand 8 states and 84 transitions. [2024-06-21 21:35:29,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 676 flow [2024-06-21 21:35:29,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 621 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:29,395 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 476 flow [2024-06-21 21:35:29,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-21 21:35:29,395 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-21 21:35:29,396 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 476 flow [2024-06-21 21:35:29,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:29,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:29,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:29,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:35:29,396 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:29,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash 980223584, now seen corresponding path program 1 times [2024-06-21 21:35:29,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:29,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224217003] [2024-06-21 21:35:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224217003] [2024-06-21 21:35:32,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224217003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:32,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:32,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370333794] [2024-06-21 21:35:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:32,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:32,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:32,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:32,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 476 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:32,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:32,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:32,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:32,740 INFO L124 PetriNetUnfolderBase]: 171/337 cut-off events. [2024-06-21 21:35:32,740 INFO L125 PetriNetUnfolderBase]: For 2744/2744 co-relation queries the response was YES. [2024-06-21 21:35:32,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 337 events. 171/337 cut-off events. For 2744/2744 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1358 event pairs, 28 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 1421. Up to 272 conditions per place. [2024-06-21 21:35:32,742 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 61 selfloop transitions, 17 changer transitions 0/81 dead transitions. [2024-06-21 21:35:32,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 679 flow [2024-06-21 21:35:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 21:35:32,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-06-21 21:35:32,744 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 476 flow. Second operand 9 states and 94 transitions. [2024-06-21 21:35:32,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 679 flow [2024-06-21 21:35:32,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 645 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:32,748 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 490 flow [2024-06-21 21:35:32,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-21 21:35:32,749 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-21 21:35:32,749 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 490 flow [2024-06-21 21:35:32,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:32,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:32,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:32,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:35:32,749 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:32,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1015678724, now seen corresponding path program 4 times [2024-06-21 21:35:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472005279] [2024-06-21 21:35:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:35,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472005279] [2024-06-21 21:35:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472005279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:35,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824833520] [2024-06-21 21:35:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:35,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:35,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:35,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 490 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:35,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:35,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:35,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:35,828 INFO L124 PetriNetUnfolderBase]: 168/336 cut-off events. [2024-06-21 21:35:35,829 INFO L125 PetriNetUnfolderBase]: For 2687/2687 co-relation queries the response was YES. [2024-06-21 21:35:35,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 336 events. 168/336 cut-off events. For 2687/2687 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1363 event pairs, 17 based on Foata normal form. 2/337 useless extension candidates. Maximal degree in co-relation 1393. Up to 234 conditions per place. [2024-06-21 21:35:35,831 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 58 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-21 21:35:35,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 689 flow [2024-06-21 21:35:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 21:35:35,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 21:35:35,832 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 490 flow. Second operand 7 states and 81 transitions. [2024-06-21 21:35:35,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 689 flow [2024-06-21 21:35:35,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 647 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:35,837 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 496 flow [2024-06-21 21:35:35,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-21 21:35:35,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-21 21:35:35,837 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 496 flow [2024-06-21 21:35:35,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:35,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:35,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:35,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:35:35,838 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:35,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:35,838 INFO L85 PathProgramCache]: Analyzing trace with hash 154015662, now seen corresponding path program 2 times [2024-06-21 21:35:35,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:35,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959406584] [2024-06-21 21:35:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:35,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:38,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959406584] [2024-06-21 21:35:38,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959406584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:38,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:38,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722800246] [2024-06-21 21:35:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:38,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:38,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 496 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:38,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:38,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:38,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:38,924 INFO L124 PetriNetUnfolderBase]: 172/340 cut-off events. [2024-06-21 21:35:38,924 INFO L125 PetriNetUnfolderBase]: For 3041/3041 co-relation queries the response was YES. [2024-06-21 21:35:38,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 340 events. 172/340 cut-off events. For 3041/3041 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1377 event pairs, 27 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 1437. Up to 269 conditions per place. [2024-06-21 21:35:38,926 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-21 21:35:38,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 79 transitions, 691 flow [2024-06-21 21:35:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 21:35:38,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:35:38,927 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 496 flow. Second operand 7 states and 77 transitions. [2024-06-21 21:35:38,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 79 transitions, 691 flow [2024-06-21 21:35:38,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 641 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:38,932 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 498 flow [2024-06-21 21:35:38,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-06-21 21:35:38,933 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-21 21:35:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 498 flow [2024-06-21 21:35:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:38,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:38,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:35:38,934 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:38,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1252038782, now seen corresponding path program 3 times [2024-06-21 21:35:38,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:38,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912467083] [2024-06-21 21:35:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:41,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912467083] [2024-06-21 21:35:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912467083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:41,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135920746] [2024-06-21 21:35:41,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:41,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:41,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:42,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:42,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 498 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:42,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:42,527 INFO L124 PetriNetUnfolderBase]: 176/353 cut-off events. [2024-06-21 21:35:42,527 INFO L125 PetriNetUnfolderBase]: For 2870/2873 co-relation queries the response was YES. [2024-06-21 21:35:42,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 353 events. 176/353 cut-off events. For 2870/2873 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1463 event pairs, 32 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 1462. Up to 269 conditions per place. [2024-06-21 21:35:42,530 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 56 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-21 21:35:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 680 flow [2024-06-21 21:35:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 21:35:42,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 21:35:42,539 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 498 flow. Second operand 7 states and 75 transitions. [2024-06-21 21:35:42,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 680 flow [2024-06-21 21:35:42,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 638 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:42,544 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 510 flow [2024-06-21 21:35:42,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-06-21 21:35:42,545 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-21 21:35:42,545 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 510 flow [2024-06-21 21:35:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:42,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:42,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:35:42,545 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:42,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1252335452, now seen corresponding path program 4 times [2024-06-21 21:35:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111363984] [2024-06-21 21:35:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:44,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111363984] [2024-06-21 21:35:44,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111363984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:44,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:44,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331524055] [2024-06-21 21:35:44,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:44,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:44,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:44,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:44,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 510 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:44,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:44,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:44,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:45,296 INFO L124 PetriNetUnfolderBase]: 173/348 cut-off events. [2024-06-21 21:35:45,297 INFO L125 PetriNetUnfolderBase]: For 2496/2499 co-relation queries the response was YES. [2024-06-21 21:35:45,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 348 events. 173/348 cut-off events. For 2496/2499 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1437 event pairs, 31 based on Foata normal form. 4/350 useless extension candidates. Maximal degree in co-relation 1398. Up to 238 conditions per place. [2024-06-21 21:35:45,301 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 53 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-06-21 21:35:45,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 77 transitions, 680 flow [2024-06-21 21:35:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 21:35:45,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-21 21:35:45,316 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 510 flow. Second operand 7 states and 73 transitions. [2024-06-21 21:35:45,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 77 transitions, 680 flow [2024-06-21 21:35:45,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 77 transitions, 638 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:45,339 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 514 flow [2024-06-21 21:35:45,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-06-21 21:35:45,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-21 21:35:45,340 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 514 flow [2024-06-21 21:35:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:45,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:35:45,341 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1544402224, now seen corresponding path program 1 times [2024-06-21 21:35:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849983227] [2024-06-21 21:35:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849983227] [2024-06-21 21:35:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849983227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:47,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:47,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374163808] [2024-06-21 21:35:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:47,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:47,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:47,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:47,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:47,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:48,146 INFO L124 PetriNetUnfolderBase]: 289/581 cut-off events. [2024-06-21 21:35:48,147 INFO L125 PetriNetUnfolderBase]: For 5799/5801 co-relation queries the response was YES. [2024-06-21 21:35:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2430 conditions, 581 events. 289/581 cut-off events. For 5799/5801 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2858 event pairs, 47 based on Foata normal form. 10/590 useless extension candidates. Maximal degree in co-relation 2387. Up to 244 conditions per place. [2024-06-21 21:35:48,163 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 70 selfloop transitions, 48 changer transitions 12/133 dead transitions. [2024-06-21 21:35:48,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1146 flow [2024-06-21 21:35:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:35:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:35:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-21 21:35:48,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-21 21:35:48,177 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 514 flow. Second operand 13 states and 147 transitions. [2024-06-21 21:35:48,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1146 flow [2024-06-21 21:35:48,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1068 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:48,185 INFO L231 Difference]: Finished difference. Result has 102 places, 89 transitions, 755 flow [2024-06-21 21:35:48,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=755, PETRI_PLACES=102, PETRI_TRANSITIONS=89} [2024-06-21 21:35:48,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-21 21:35:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 89 transitions, 755 flow [2024-06-21 21:35:48,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:48,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:48,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:35:48,187 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:48,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash 948810788, now seen corresponding path program 2 times [2024-06-21 21:35:48,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:48,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650026787] [2024-06-21 21:35:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650026787] [2024-06-21 21:35:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650026787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892274448] [2024-06-21 21:35:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:51,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:51,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 89 transitions, 755 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:51,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:51,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:51,947 INFO L124 PetriNetUnfolderBase]: 304/618 cut-off events. [2024-06-21 21:35:51,947 INFO L125 PetriNetUnfolderBase]: For 8475/8477 co-relation queries the response was YES. [2024-06-21 21:35:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 618 events. 304/618 cut-off events. For 8475/8477 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3084 event pairs, 62 based on Foata normal form. 10/627 useless extension candidates. Maximal degree in co-relation 2782. Up to 250 conditions per place. [2024-06-21 21:35:51,952 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 50 changer transitions 15/119 dead transitions. [2024-06-21 21:35:51,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 1119 flow [2024-06-21 21:35:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:35:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:35:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 21:35:51,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:35:51,953 INFO L175 Difference]: Start difference. First operand has 102 places, 89 transitions, 755 flow. Second operand 11 states and 121 transitions. [2024-06-21 21:35:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 1119 flow [2024-06-21 21:35:51,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 119 transitions, 1054 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:51,962 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 757 flow [2024-06-21 21:35:51,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=757, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-06-21 21:35:51,963 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2024-06-21 21:35:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 757 flow [2024-06-21 21:35:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:51,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:35:51,964 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash -789898644, now seen corresponding path program 3 times [2024-06-21 21:35:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:51,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286809753] [2024-06-21 21:35:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286809753] [2024-06-21 21:35:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286809753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:54,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490556070] [2024-06-21 21:35:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:54,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:54,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 757 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:54,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:54,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:54,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:55,637 INFO L124 PetriNetUnfolderBase]: 302/624 cut-off events. [2024-06-21 21:35:55,638 INFO L125 PetriNetUnfolderBase]: For 10864/10866 co-relation queries the response was YES. [2024-06-21 21:35:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2800 conditions, 624 events. 302/624 cut-off events. For 10864/10866 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3225 event pairs, 75 based on Foata normal form. 22/645 useless extension candidates. Maximal degree in co-relation 2754. Up to 344 conditions per place. [2024-06-21 21:35:55,668 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 44 selfloop transitions, 42 changer transitions 17/106 dead transitions. [2024-06-21 21:35:55,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 1025 flow [2024-06-21 21:35:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:35:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:35:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 21:35:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-21 21:35:55,670 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 757 flow. Second operand 11 states and 114 transitions. [2024-06-21 21:35:55,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 1025 flow [2024-06-21 21:35:55,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 945 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:35:55,678 INFO L231 Difference]: Finished difference. Result has 102 places, 75 transitions, 690 flow [2024-06-21 21:35:55,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=690, PETRI_PLACES=102, PETRI_TRANSITIONS=75} [2024-06-21 21:35:55,678 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-21 21:35:55,678 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 75 transitions, 690 flow [2024-06-21 21:35:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:55,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:55,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:55,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:35:55,679 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:55,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1416309522, now seen corresponding path program 4 times [2024-06-21 21:35:55,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346017513] [2024-06-21 21:35:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:58,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:58,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346017513] [2024-06-21 21:35:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346017513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:58,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368992547] [2024-06-21 21:35:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:58,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:35:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 75 transitions, 690 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:58,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:35:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:59,443 INFO L124 PetriNetUnfolderBase]: 270/572 cut-off events. [2024-06-21 21:35:59,443 INFO L125 PetriNetUnfolderBase]: For 9104/9106 co-relation queries the response was YES. [2024-06-21 21:35:59,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2601 conditions, 572 events. 270/572 cut-off events. For 9104/9106 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2900 event pairs, 63 based on Foata normal form. 18/589 useless extension candidates. Maximal degree in co-relation 2556. Up to 322 conditions per place. [2024-06-21 21:35:59,446 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 38 selfloop transitions, 35 changer transitions 20/96 dead transitions. [2024-06-21 21:35:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 930 flow [2024-06-21 21:35:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:35:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:35:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-21 21:35:59,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-06-21 21:35:59,449 INFO L175 Difference]: Start difference. First operand has 102 places, 75 transitions, 690 flow. Second operand 11 states and 111 transitions. [2024-06-21 21:35:59,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 930 flow [2024-06-21 21:35:59,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 842 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:35:59,457 INFO L231 Difference]: Finished difference. Result has 100 places, 66 transitions, 588 flow [2024-06-21 21:35:59,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=588, PETRI_PLACES=100, PETRI_TRANSITIONS=66} [2024-06-21 21:35:59,458 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2024-06-21 21:35:59,458 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 66 transitions, 588 flow [2024-06-21 21:35:59,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:59,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:35:59,458 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:35:59,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash 49722072, now seen corresponding path program 5 times [2024-06-21 21:35:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:59,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275849808] [2024-06-21 21:35:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:59,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275849808] [2024-06-21 21:36:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275849808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:02,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:02,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651676485] [2024-06-21 21:36:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:02,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:02,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 66 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:02,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:02,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:02,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:02,825 INFO L124 PetriNetUnfolderBase]: 254/523 cut-off events. [2024-06-21 21:36:02,825 INFO L125 PetriNetUnfolderBase]: For 8885/8893 co-relation queries the response was YES. [2024-06-21 21:36:02,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 523 events. 254/523 cut-off events. For 8885/8893 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2593 event pairs, 70 based on Foata normal form. 28/548 useless extension candidates. Maximal degree in co-relation 2324. Up to 327 conditions per place. [2024-06-21 21:36:02,828 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 46 selfloop transitions, 24 changer transitions 14/87 dead transitions. [2024-06-21 21:36:02,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 87 transitions, 814 flow [2024-06-21 21:36:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:36:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:36:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-06-21 21:36:02,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2024-06-21 21:36:02,830 INFO L175 Difference]: Start difference. First operand has 100 places, 66 transitions, 588 flow. Second operand 12 states and 118 transitions. [2024-06-21 21:36:02,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 87 transitions, 814 flow [2024-06-21 21:36:02,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 87 transitions, 715 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 21:36:02,837 INFO L231 Difference]: Finished difference. Result has 92 places, 60 transitions, 484 flow [2024-06-21 21:36:02,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=60} [2024-06-21 21:36:02,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 21:36:02,837 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 60 transitions, 484 flow [2024-06-21 21:36:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:02,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:02,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:36:02,838 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:02,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash 322160974, now seen corresponding path program 1 times [2024-06-21 21:36:02,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:02,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208795276] [2024-06-21 21:36:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:02,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208795276] [2024-06-21 21:36:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208795276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:05,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488835103] [2024-06-21 21:36:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:05,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:05,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 60 transitions, 484 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:05,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:05,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:05,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:06,782 INFO L124 PetriNetUnfolderBase]: 261/544 cut-off events. [2024-06-21 21:36:06,783 INFO L125 PetriNetUnfolderBase]: For 7328/7328 co-relation queries the response was YES. [2024-06-21 21:36:06,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 544 events. 261/544 cut-off events. For 7328/7328 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2772 event pairs, 91 based on Foata normal form. 6/547 useless extension candidates. Maximal degree in co-relation 2486. Up to 290 conditions per place. [2024-06-21 21:36:06,786 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 20 changer transitions 11/84 dead transitions. [2024-06-21 21:36:06,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 84 transitions, 748 flow [2024-06-21 21:36:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:36:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:36:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-21 21:36:06,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33055555555555555 [2024-06-21 21:36:06,791 INFO L175 Difference]: Start difference. First operand has 92 places, 60 transitions, 484 flow. Second operand 12 states and 119 transitions. [2024-06-21 21:36:06,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 84 transitions, 748 flow [2024-06-21 21:36:06,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 680 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 21:36:06,797 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 421 flow [2024-06-21 21:36:06,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=421, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2024-06-21 21:36:06,798 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-21 21:36:06,798 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 421 flow [2024-06-21 21:36:06,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:06,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:06,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:06,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:36:06,799 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:06,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1510983820, now seen corresponding path program 6 times [2024-06-21 21:36:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750826508] [2024-06-21 21:36:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:09,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:09,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750826508] [2024-06-21 21:36:09,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750826508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:09,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:09,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:09,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700405445] [2024-06-21 21:36:09,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:09,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:09,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:09,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:09,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:09,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:09,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:10,182 INFO L124 PetriNetUnfolderBase]: 215/446 cut-off events. [2024-06-21 21:36:10,182 INFO L125 PetriNetUnfolderBase]: For 5780/5780 co-relation queries the response was YES. [2024-06-21 21:36:10,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 446 events. 215/446 cut-off events. For 5780/5780 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2116 event pairs, 71 based on Foata normal form. 20/463 useless extension candidates. Maximal degree in co-relation 1830. Up to 290 conditions per place. [2024-06-21 21:36:10,184 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 41 selfloop transitions, 14 changer transitions 14/72 dead transitions. [2024-06-21 21:36:10,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 72 transitions, 607 flow [2024-06-21 21:36:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 21:36:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 21:36:10,187 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 421 flow. Second operand 10 states and 99 transitions. [2024-06-21 21:36:10,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 72 transitions, 607 flow [2024-06-21 21:36:10,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 72 transitions, 567 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:36:10,191 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 348 flow [2024-06-21 21:36:10,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2024-06-21 21:36:10,192 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-06-21 21:36:10,192 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 348 flow [2024-06-21 21:36:10,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:10,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:10,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:10,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:36:10,192 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:10,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1510987540, now seen corresponding path program 7 times [2024-06-21 21:36:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:10,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334247903] [2024-06-21 21:36:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:10,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:12,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334247903] [2024-06-21 21:36:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334247903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:12,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425108461] [2024-06-21 21:36:12,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:12,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:12,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:12,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 348 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:12,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:12,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:12,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:13,293 INFO L124 PetriNetUnfolderBase]: 169/360 cut-off events. [2024-06-21 21:36:13,293 INFO L125 PetriNetUnfolderBase]: For 4366/4366 co-relation queries the response was YES. [2024-06-21 21:36:13,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 360 events. 169/360 cut-off events. For 4366/4366 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1555 event pairs, 45 based on Foata normal form. 16/373 useless extension candidates. Maximal degree in co-relation 1402. Up to 224 conditions per place. [2024-06-21 21:36:13,316 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 34 selfloop transitions, 8 changer transitions 20/65 dead transitions. [2024-06-21 21:36:13,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 514 flow [2024-06-21 21:36:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-21 21:36:13,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-06-21 21:36:13,318 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 348 flow. Second operand 10 states and 96 transitions. [2024-06-21 21:36:13,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 514 flow [2024-06-21 21:36:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 65 transitions, 466 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:36:13,322 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 243 flow [2024-06-21 21:36:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=243, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2024-06-21 21:36:13,322 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-06-21 21:36:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 243 flow [2024-06-21 21:36:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:13,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:13,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:36:13,323 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:13,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 158490080, now seen corresponding path program 2 times [2024-06-21 21:36:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008515377] [2024-06-21 21:36:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:16,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008515377] [2024-06-21 21:36:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008515377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785511107] [2024-06-21 21:36:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:16,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:16,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 243 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:16,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:16,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:16,982 INFO L124 PetriNetUnfolderBase]: 127/269 cut-off events. [2024-06-21 21:36:16,982 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2024-06-21 21:36:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 269 events. 127/269 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1076 event pairs, 34 based on Foata normal form. 10/278 useless extension candidates. Maximal degree in co-relation 1001. Up to 153 conditions per place. [2024-06-21 21:36:16,985 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 27 selfloop transitions, 16 changer transitions 11/57 dead transitions. [2024-06-21 21:36:16,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 57 transitions, 395 flow [2024-06-21 21:36:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 21:36:16,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 21:36:16,989 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 243 flow. Second operand 10 states and 99 transitions. [2024-06-21 21:36:16,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 57 transitions, 395 flow [2024-06-21 21:36:16,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 363 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:36:16,992 INFO L231 Difference]: Finished difference. Result has 68 places, 38 transitions, 232 flow [2024-06-21 21:36:16,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=68, PETRI_TRANSITIONS=38} [2024-06-21 21:36:16,993 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-21 21:36:16,993 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 38 transitions, 232 flow [2024-06-21 21:36:16,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:16,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:16,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:16,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:36:16,993 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:16,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:16,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1146613978, now seen corresponding path program 3 times [2024-06-21 21:36:16,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:16,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31591326] [2024-06-21 21:36:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:16,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31591326] [2024-06-21 21:36:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31591326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:19,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:19,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5883340] [2024-06-21 21:36:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 38 transitions, 232 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:20,521 INFO L124 PetriNetUnfolderBase]: 109/239 cut-off events. [2024-06-21 21:36:20,522 INFO L125 PetriNetUnfolderBase]: For 2626/2626 co-relation queries the response was YES. [2024-06-21 21:36:20,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 239 events. 109/239 cut-off events. For 2626/2626 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 936 event pairs, 30 based on Foata normal form. 6/244 useless extension candidates. Maximal degree in co-relation 921. Up to 143 conditions per place. [2024-06-21 21:36:20,523 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 24 selfloop transitions, 14 changer transitions 11/52 dead transitions. [2024-06-21 21:36:20,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 52 transitions, 362 flow [2024-06-21 21:36:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-06-21 21:36:20,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2024-06-21 21:36:20,525 INFO L175 Difference]: Start difference. First operand has 68 places, 38 transitions, 232 flow. Second operand 10 states and 95 transitions. [2024-06-21 21:36:20,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 52 transitions, 362 flow [2024-06-21 21:36:20,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 52 transitions, 324 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:36:20,528 INFO L231 Difference]: Finished difference. Result has 66 places, 35 transitions, 210 flow [2024-06-21 21:36:20,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=35} [2024-06-21 21:36:20,528 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-21 21:36:20,528 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 35 transitions, 210 flow [2024-06-21 21:36:20,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:20,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:20,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:20,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:36:20,529 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:20,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1146873448, now seen corresponding path program 4 times [2024-06-21 21:36:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286445865] [2024-06-21 21:36:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286445865] [2024-06-21 21:36:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286445865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095454759] [2024-06-21 21:36:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:23,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:23,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 35 transitions, 210 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:23,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:23,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:24,357 INFO L124 PetriNetUnfolderBase]: 121/267 cut-off events. [2024-06-21 21:36:24,357 INFO L125 PetriNetUnfolderBase]: For 3481/3485 co-relation queries the response was YES. [2024-06-21 21:36:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 267 events. 121/267 cut-off events. For 3481/3485 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1096 event pairs, 46 based on Foata normal form. 10/276 useless extension candidates. Maximal degree in co-relation 1097. Up to 120 conditions per place. [2024-06-21 21:36:24,359 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 28 selfloop transitions, 12 changer transitions 10/53 dead transitions. [2024-06-21 21:36:24,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 388 flow [2024-06-21 21:36:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-21 21:36:24,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233333333333333 [2024-06-21 21:36:24,360 INFO L175 Difference]: Start difference. First operand has 66 places, 35 transitions, 210 flow. Second operand 10 states and 97 transitions. [2024-06-21 21:36:24,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 388 flow [2024-06-21 21:36:24,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 344 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 21:36:24,362 INFO L231 Difference]: Finished difference. Result has 62 places, 31 transitions, 179 flow [2024-06-21 21:36:24,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=31} [2024-06-21 21:36:24,363 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2024-06-21 21:36:24,363 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 31 transitions, 179 flow [2024-06-21 21:36:24,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:24,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:24,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:36:24,363 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:24,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 945517288, now seen corresponding path program 5 times [2024-06-21 21:36:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556710643] [2024-06-21 21:36:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556710643] [2024-06-21 21:36:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556710643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:27,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:27,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727841214] [2024-06-21 21:36:27,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:27,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:27,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 31 transitions, 179 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:27,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:27,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:27,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:28,114 INFO L124 PetriNetUnfolderBase]: 117/253 cut-off events. [2024-06-21 21:36:28,114 INFO L125 PetriNetUnfolderBase]: For 2963/2963 co-relation queries the response was YES. [2024-06-21 21:36:28,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 253 events. 117/253 cut-off events. For 2963/2963 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1049 event pairs, 49 based on Foata normal form. 10/262 useless extension candidates. Maximal degree in co-relation 1005. Up to 165 conditions per place. [2024-06-21 21:36:28,115 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 20 selfloop transitions, 10 changer transitions 11/44 dead transitions. [2024-06-21 21:36:28,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 44 transitions, 297 flow [2024-06-21 21:36:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-21 21:36:28,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2024-06-21 21:36:28,117 INFO L175 Difference]: Start difference. First operand has 62 places, 31 transitions, 179 flow. Second operand 9 states and 86 transitions. [2024-06-21 21:36:28,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 44 transitions, 297 flow [2024-06-21 21:36:28,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 261 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 21:36:28,119 INFO L231 Difference]: Finished difference. Result has 54 places, 28 transitions, 148 flow [2024-06-21 21:36:28,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=54, PETRI_TRANSITIONS=28} [2024-06-21 21:36:28,119 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2024-06-21 21:36:28,119 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 28 transitions, 148 flow [2024-06-21 21:36:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:28,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:28,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:36:28,120 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:28,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1421418370, now seen corresponding path program 8 times [2024-06-21 21:36:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:28,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318526015] [2024-06-21 21:36:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318526015] [2024-06-21 21:36:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318526015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:30,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:30,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565092391] [2024-06-21 21:36:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:30,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:30,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 28 transitions, 148 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:30,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:30,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:30,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:31,028 INFO L124 PetriNetUnfolderBase]: 78/176 cut-off events. [2024-06-21 21:36:31,029 INFO L125 PetriNetUnfolderBase]: For 1281/1281 co-relation queries the response was YES. [2024-06-21 21:36:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 176 events. 78/176 cut-off events. For 1281/1281 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 618 event pairs, 36 based on Foata normal form. 10/185 useless extension candidates. Maximal degree in co-relation 614. Up to 100 conditions per place. [2024-06-21 21:36:31,029 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 20 selfloop transitions, 7 changer transitions 11/41 dead transitions. [2024-06-21 21:36:31,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 258 flow [2024-06-21 21:36:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-21 21:36:31,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3111111111111111 [2024-06-21 21:36:31,031 INFO L175 Difference]: Start difference. First operand has 54 places, 28 transitions, 148 flow. Second operand 9 states and 84 transitions. [2024-06-21 21:36:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 258 flow [2024-06-21 21:36:31,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 234 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:36:31,032 INFO L231 Difference]: Finished difference. Result has 52 places, 25 transitions, 121 flow [2024-06-21 21:36:31,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=121, PETRI_PLACES=52, PETRI_TRANSITIONS=25} [2024-06-21 21:36:31,033 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-21 21:36:31,033 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 121 flow [2024-06-21 21:36:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:36:31,033 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:31,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash 479519168, now seen corresponding path program 6 times [2024-06-21 21:36:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:31,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507045702] [2024-06-21 21:36:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:33,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507045702] [2024-06-21 21:36:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507045702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:33,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:33,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035035678] [2024-06-21 21:36:33,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:33,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:33,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 25 transitions, 121 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:33,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:33,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:33,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:34,484 INFO L124 PetriNetUnfolderBase]: 47/117 cut-off events. [2024-06-21 21:36:34,484 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-06-21 21:36:34,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 117 events. 47/117 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 19 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 370. Up to 57 conditions per place. [2024-06-21 21:36:34,485 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 16 selfloop transitions, 5 changer transitions 11/35 dead transitions. [2024-06-21 21:36:34,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 35 transitions, 205 flow [2024-06-21 21:36:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-06-21 21:36:34,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2024-06-21 21:36:34,486 INFO L175 Difference]: Start difference. First operand has 52 places, 25 transitions, 121 flow. Second operand 9 states and 78 transitions. [2024-06-21 21:36:34,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 35 transitions, 205 flow [2024-06-21 21:36:34,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 185 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:36:34,487 INFO L231 Difference]: Finished difference. Result has 50 places, 21 transitions, 93 flow [2024-06-21 21:36:34,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=93, PETRI_PLACES=50, PETRI_TRANSITIONS=21} [2024-06-21 21:36:34,497 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2024-06-21 21:36:34,497 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 21 transitions, 93 flow [2024-06-21 21:36:34,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:34,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:34,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:34,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:36:34,498 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:36:34,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 473793716, now seen corresponding path program 9 times [2024-06-21 21:36:34,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:34,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392276698] [2024-06-21 21:36:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:37,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392276698] [2024-06-21 21:36:37,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392276698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:37,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:37,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:37,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614094476] [2024-06-21 21:36:37,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:37,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:37,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:37,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 21:36:37,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 21 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:37,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 21:36:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:37,686 INFO L124 PetriNetUnfolderBase]: 21/59 cut-off events. [2024-06-21 21:36:37,686 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-06-21 21:36:37,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 59 events. 21/59 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 1 based on Foata normal form. 8/66 useless extension candidates. Maximal degree in co-relation 154. Up to 32 conditions per place. [2024-06-21 21:36:37,687 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-21 21:36:37,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 25 transitions, 129 flow [2024-06-21 21:36:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 63 transitions. [2024-06-21 21:36:37,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2625 [2024-06-21 21:36:37,688 INFO L175 Difference]: Start difference. First operand has 50 places, 21 transitions, 93 flow. Second operand 8 states and 63 transitions. [2024-06-21 21:36:37,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 25 transitions, 129 flow [2024-06-21 21:36:37,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 25 transitions, 103 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:36:37,688 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2024-06-21 21:36:37,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2024-06-21 21:36:37,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-21 21:36:37,689 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2024-06-21 21:36:37,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:37,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:36:37,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:36:37,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:36:37,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:36:37,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:36:37,693 INFO L445 BasicCegarLoop]: Path program histogram: [9, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:37,695 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:36:37,696 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:36:37,698 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:36:37,698 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:36:37,699 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:36:37 BasicIcfg [2024-06-21 21:36:37,699 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:36:37,699 INFO L158 Benchmark]: Toolchain (without parser) took 127672.53ms. Allocated memory was 167.8MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 132.3MB in the beginning and 1.0GB in the end (delta: -875.3MB). Peak memory consumption was 590.2MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,700 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:36:37,700 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:36:37,700 INFO L158 Benchmark]: CACSL2BoogieTranslator took 553.30ms. Allocated memory is still 167.8MB. Free memory was 131.7MB in the beginning and 91.3MB in the end (delta: 40.4MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,700 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.08ms. Allocated memory is still 167.8MB. Free memory was 91.3MB in the beginning and 88.3MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,700 INFO L158 Benchmark]: Boogie Preprocessor took 75.50ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 84.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,701 INFO L158 Benchmark]: RCFGBuilder took 844.85ms. Allocated memory was 167.8MB in the beginning and 239.1MB in the end (delta: 71.3MB). Free memory was 84.1MB in the beginning and 190.5MB in the end (delta: -106.4MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,704 INFO L158 Benchmark]: TraceAbstraction took 126124.58ms. Allocated memory was 239.1MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 189.4MB in the beginning and 1.0GB in the end (delta: -818.1MB). Peak memory consumption was 575.4MB. Max. memory is 16.1GB. [2024-06-21 21:36:37,705 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 553.30ms. Allocated memory is still 167.8MB. Free memory was 131.7MB in the beginning and 91.3MB in the end (delta: 40.4MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.08ms. Allocated memory is still 167.8MB. Free memory was 91.3MB in the beginning and 88.3MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.50ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 84.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 844.85ms. Allocated memory was 167.8MB in the beginning and 239.1MB in the end (delta: 71.3MB). Free memory was 84.1MB in the beginning and 190.5MB in the end (delta: -106.4MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. * TraceAbstraction took 126124.58ms. Allocated memory was 239.1MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 189.4MB in the beginning and 1.0GB in the end (delta: -818.1MB). Peak memory consumption was 575.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 817]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 126.0s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 26.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1210 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1112 mSDsluCounter, 755 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 603 mSDsCounter, 364 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6757 IncrementalHoareTripleChecker+Invalid, 7121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 364 mSolverCounterUnsat, 152 mSDtfsCounter, 6757 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 41.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=757occurred in iteration=28, InterpolantAutomatonStates: 344, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 98.2s InterpolantComputationTime, 613 NumberOfCodeBlocks, 613 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 572 ConstructedInterpolants, 0 QuantifiedInterpolants, 71623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 21:36:37,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE