./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix035_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix035_power.opt_rmo.opt.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-bcb38a6-m [2024-06-04 15:05:38,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:05:38,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:05:38,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:05:38,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:05:38,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:05:38,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:05:38,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:05:38,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:05:38,113 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:05:38,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:05:38,114 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:05:38,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:05:38,116 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:05:38,116 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:05:38,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:05:38,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:05:38,117 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:05:38,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:05:38,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:05:38,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:05:38,118 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:05:38,119 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:05:38,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:05:38,119 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:05:38,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:05:38,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:05:38,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:05:38,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:05:38,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:05:38,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:05:38,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:05:38,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:05:38,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:05:38,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:05:38,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:05:38,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:05:38,371 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:05:38,371 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:05:38,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-04 15:05:39,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:05:39,993 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:05:39,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-04 15:05:40,020 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7688db1e/b2019826eb6447af8271c23e99c16e25/FLAG0f3ac9f69 [2024-06-04 15:05:40,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7688db1e/b2019826eb6447af8271c23e99c16e25 [2024-06-04 15:05:40,037 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:05:40,038 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:05:40,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml [2024-06-04 15:05:40,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:05:40,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:05:40,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:05:40,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:05:40,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:05:40,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:05:40" (1/2) ... [2024-06-04 15:05:40,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79916dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:05:40, skipping insertion in model container [2024-06-04 15:05:40,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:05:40" (1/2) ... [2024-06-04 15:05:40,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77ac39ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:05:40, skipping insertion in model container [2024-06-04 15:05:40,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:05:40" (2/2) ... [2024-06-04 15:05:40,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79916dbd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40, skipping insertion in model container [2024-06-04 15:05:40,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:05:40" (2/2) ... [2024-06-04 15:05:40,244 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:05:40,367 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:05:40,367 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-04 15:05:40,368 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-04 15:05:40,368 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-04 15:05:40,368 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:05:40,368 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-04 15:05:40,407 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:05:40,700 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:05:40,707 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:05:40,807 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:05:40,835 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:05:40,835 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40 WrapperNode [2024-06-04 15:05:40,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:05:40,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:05:40,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:05:40,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:05:40,841 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 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,851 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 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,890 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-04 15:05:40,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:05:40,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:05:40,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:05:40,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:05:40,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,949 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:05:40,950 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:05:40,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:05:40,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:05:40,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:05:40,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (1/1) ... [2024-06-04 15:05:40,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:05:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:05:41,034 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) [2024-06-04 15:05:41,045 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 [2024-06-04 15:05:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:05:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:05:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:05:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:05:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:05:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:05:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:05:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:05:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:05:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:05:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:05:41,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:05:41,069 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:05:41,166 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:05:41,167 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:05:41,525 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:05:41,525 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:05:41,695 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:05:41,696 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:05:41,697 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:05:41 BoogieIcfgContainer [2024-06-04 15:05:41,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:05:41,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:05:41,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:05:41,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:05:41,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:05:40" (1/4) ... [2024-06-04 15:05:41,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398d26b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:05:41, skipping insertion in model container [2024-06-04 15:05:41,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:05:40" (2/4) ... [2024-06-04 15:05:41,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398d26b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:05:41, skipping insertion in model container [2024-06-04 15:05:41,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:05:40" (3/4) ... [2024-06-04 15:05:41,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398d26b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:05:41, skipping insertion in model container [2024-06-04 15:05:41,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:05:41" (4/4) ... [2024-06-04 15:05:41,704 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_power.opt_rmo.opt.i [2024-06-04 15:05:41,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:05:41,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:05:41,718 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:05:41,760 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:05:41,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:05:41,853 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-04 15:05:41,855 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:05:41,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:05:41,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:05:41,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-04 15:05:41,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:05:41,879 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;@205b2c2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:05:41,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:05:41,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:05:41,886 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:05:41,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:05:41,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:41,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:05:41,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:41,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1358440230, now seen corresponding path program 1 times [2024-06-04 15:05:41,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128907925] [2024-06-04 15:05:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:43,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:43,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128907925] [2024-06-04 15:05:43,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128907925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:43,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:43,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:05:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297092573] [2024-06-04 15:05:43,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:05:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:05:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:05:43,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-04 15:05:43,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:43,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:43,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-04 15:05:43,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:43,531 INFO L124 PetriNetUnfolderBase]: 1116/1817 cut-off events. [2024-06-04 15:05:43,532 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 15:05:43,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3570 conditions, 1817 events. 1116/1817 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9170 event pairs, 765 based on Foata normal form. 1/1763 useless extension candidates. Maximal degree in co-relation 3555. Up to 1676 conditions per place. [2024-06-04 15:05:43,548 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-04 15:05:43,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-04 15:05:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:05:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:05:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-04 15:05:43,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-04 15:05:43,586 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-04 15:05:43,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-04 15:05:43,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:05:43,595 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-04 15:05:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-04 15:05:43,601 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-04 15:05:43,602 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-04 15:05:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:43,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:43,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:05:43,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 209036473, now seen corresponding path program 1 times [2024-06-04 15:05:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535412523] [2024-06-04 15:05:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:44,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535412523] [2024-06-04 15:05:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535412523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:05:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330782813] [2024-06-04 15:05:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:05:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:05:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:05:44,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:05:44,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:44,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:44,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:05:44,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:44,792 INFO L124 PetriNetUnfolderBase]: 1274/2001 cut-off events. [2024-06-04 15:05:44,793 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-04 15:05:44,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 2001 events. 1274/2001 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9806 event pairs, 608 based on Foata normal form. 6/1981 useless extension candidates. Maximal degree in co-relation 4494. Up to 1873 conditions per place. [2024-06-04 15:05:44,805 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 15:05:44,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 250 flow [2024-06-04 15:05:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:05:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:05:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 15:05:44,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-04 15:05:44,809 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 100 transitions. [2024-06-04 15:05:44,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 250 flow [2024-06-04 15:05:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:05:44,812 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-04 15:05:44,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-04 15:05:44,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-04 15:05:44,813 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-04 15:05:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:44,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:44,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:05:44,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:44,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash -295724106, now seen corresponding path program 1 times [2024-06-04 15:05:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:44,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591111380] [2024-06-04 15:05:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:46,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:46,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591111380] [2024-06-04 15:05:46,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591111380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:46,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:46,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:05:46,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932595763] [2024-06-04 15:05:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:46,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:05:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:05:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:05:46,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:05:46,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:46,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:46,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:05:46,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:46,880 INFO L124 PetriNetUnfolderBase]: 1265/1984 cut-off events. [2024-06-04 15:05:46,880 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2024-06-04 15:05:46,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 1984 events. 1265/1984 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9757 event pairs, 445 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 4966. Up to 1828 conditions per place. [2024-06-04 15:05:46,890 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-04 15:05:46,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 356 flow [2024-06-04 15:05:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:05:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:05:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 15:05:46,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-04 15:05:46,895 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 139 transitions. [2024-06-04 15:05:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 356 flow [2024-06-04 15:05:46,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 15:05:46,898 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-04 15:05:46,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-04 15:05:46,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-04 15:05:46,900 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-04 15:05:46,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:46,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:46,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:46,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:05:46,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:46,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1079015881, now seen corresponding path program 1 times [2024-06-04 15:05:46,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:46,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879694748] [2024-06-04 15:05:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:46,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879694748] [2024-06-04 15:05:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879694748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:47,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:05:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680259121] [2024-06-04 15:05:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:05:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:05:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:05:47,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:05:47,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:47,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:47,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:05:47,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:48,025 INFO L124 PetriNetUnfolderBase]: 1090/1820 cut-off events. [2024-06-04 15:05:48,026 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2024-06-04 15:05:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 1820 events. 1090/1820 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9391 event pairs, 460 based on Foata normal form. 2/1815 useless extension candidates. Maximal degree in co-relation 4877. Up to 1627 conditions per place. [2024-06-04 15:05:48,036 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-04 15:05:48,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 327 flow [2024-06-04 15:05:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:05:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:05:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-04 15:05:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:05:48,038 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 105 transitions. [2024-06-04 15:05:48,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 327 flow [2024-06-04 15:05:48,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:05:48,042 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-04 15:05:48,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-04 15:05:48,044 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-04 15:05:48,044 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-04 15:05:48,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:48,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:48,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:48,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:05:48,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:48,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 20789242, now seen corresponding path program 1 times [2024-06-04 15:05:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:48,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977041777] [2024-06-04 15:05:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:48,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977041777] [2024-06-04 15:05:48,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977041777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:48,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:48,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:05:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469090401] [2024-06-04 15:05:48,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:48,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:05:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:05:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:05:48,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:48,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:48,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:48,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:49,311 INFO L124 PetriNetUnfolderBase]: 1282/2029 cut-off events. [2024-06-04 15:05:49,312 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2024-06-04 15:05:49,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6031 conditions, 2029 events. 1282/2029 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10031 event pairs, 530 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 6010. Up to 1880 conditions per place. [2024-06-04 15:05:49,323 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 52 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-04 15:05:49,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 394 flow [2024-06-04 15:05:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:05:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:05:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-04 15:05:49,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-04 15:05:49,325 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 123 transitions. [2024-06-04 15:05:49,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 394 flow [2024-06-04 15:05:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 374 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:05:49,333 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-04 15:05:49,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-04 15:05:49,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-04 15:05:49,335 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-04 15:05:49,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:49,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:49,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:05:49,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:49,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:49,337 INFO L85 PathProgramCache]: Analyzing trace with hash 20938972, now seen corresponding path program 2 times [2024-06-04 15:05:49,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:49,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493728372] [2024-06-04 15:05:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:50,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493728372] [2024-06-04 15:05:50,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493728372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:50,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:50,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:05:50,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043045254] [2024-06-04 15:05:50,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:05:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:05:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:05:50,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:50,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:50,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:50,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:50,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:50,606 INFO L124 PetriNetUnfolderBase]: 1288/2048 cut-off events. [2024-06-04 15:05:50,606 INFO L125 PetriNetUnfolderBase]: For 4533/4537 co-relation queries the response was YES. [2024-06-04 15:05:50,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 2048 events. 1288/2048 cut-off events. For 4533/4537 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10202 event pairs, 528 based on Foata normal form. 8/2048 useless extension candidates. Maximal degree in co-relation 6565. Up to 1862 conditions per place. [2024-06-04 15:05:50,618 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-04 15:05:50,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 432 flow [2024-06-04 15:05:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:05:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:05:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-04 15:05:50,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-04 15:05:50,620 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 123 transitions. [2024-06-04 15:05:50,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 432 flow [2024-06-04 15:05:50,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 402 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:05:50,624 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 274 flow [2024-06-04 15:05:50,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-04 15:05:50,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-04 15:05:50,627 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 274 flow [2024-06-04 15:05:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:50,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:50,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:50,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:05:50,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:50,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1847107370, now seen corresponding path program 1 times [2024-06-04 15:05:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:50,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535712836] [2024-06-04 15:05:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:51,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535712836] [2024-06-04 15:05:51,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535712836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:51,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:51,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:05:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562089464] [2024-06-04 15:05:51,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:05:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:05:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:05:51,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:51,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:51,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:51,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:51,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:52,268 INFO L124 PetriNetUnfolderBase]: 1379/2248 cut-off events. [2024-06-04 15:05:52,268 INFO L125 PetriNetUnfolderBase]: For 6215/6215 co-relation queries the response was YES. [2024-06-04 15:05:52,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2248 events. 1379/2248 cut-off events. For 6215/6215 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11515 event pairs, 545 based on Foata normal form. 2/2239 useless extension candidates. Maximal degree in co-relation 7490. Up to 2030 conditions per place. [2024-06-04 15:05:52,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-04 15:05:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 503 flow [2024-06-04 15:05:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:05:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:05:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 15:05:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-04 15:05:52,284 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 274 flow. Second operand 7 states and 137 transitions. [2024-06-04 15:05:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 503 flow [2024-06-04 15:05:52,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 454 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:05:52,288 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 310 flow [2024-06-04 15:05:52,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-04 15:05:52,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-04 15:05:52,289 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 310 flow [2024-06-04 15:05:52,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:52,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:52,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:52,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:05:52,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:52,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1603250192, now seen corresponding path program 1 times [2024-06-04 15:05:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32406798] [2024-06-04 15:05:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:53,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:53,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32406798] [2024-06-04 15:05:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32406798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:53,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:53,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:05:53,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293283592] [2024-06-04 15:05:53,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:53,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:05:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:05:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:05:53,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:53,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:53,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:54,066 INFO L124 PetriNetUnfolderBase]: 1476/2335 cut-off events. [2024-06-04 15:05:54,066 INFO L125 PetriNetUnfolderBase]: For 8812/8812 co-relation queries the response was YES. [2024-06-04 15:05:54,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 2335 events. 1476/2335 cut-off events. For 8812/8812 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11831 event pairs, 568 based on Foata normal form. 2/2312 useless extension candidates. Maximal degree in co-relation 8560. Up to 2155 conditions per place. [2024-06-04 15:05:54,093 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-04 15:05:54,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 566 flow [2024-06-04 15:05:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:05:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:05:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-04 15:05:54,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-04 15:05:54,095 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 310 flow. Second operand 7 states and 143 transitions. [2024-06-04 15:05:54,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 566 flow [2024-06-04 15:05:54,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 528 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:05:54,102 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 346 flow [2024-06-04 15:05:54,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-04 15:05:54,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-04 15:05:54,104 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 346 flow [2024-06-04 15:05:54,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:54,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:54,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:05:54,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:54,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2009151036, now seen corresponding path program 1 times [2024-06-04 15:05:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:54,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774802366] [2024-06-04 15:05:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:55,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774802366] [2024-06-04 15:05:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774802366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:55,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:55,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:05:55,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33871797] [2024-06-04 15:05:55,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:55,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:05:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:05:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:05:55,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:55,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:55,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:55,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:55,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:56,318 INFO L124 PetriNetUnfolderBase]: 1361/2214 cut-off events. [2024-06-04 15:05:56,318 INFO L125 PetriNetUnfolderBase]: For 9740/9740 co-relation queries the response was YES. [2024-06-04 15:05:56,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8275 conditions, 2214 events. 1361/2214 cut-off events. For 9740/9740 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11307 event pairs, 505 based on Foata normal form. 4/2203 useless extension candidates. Maximal degree in co-relation 8249. Up to 1986 conditions per place. [2024-06-04 15:05:56,334 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-04 15:05:56,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 596 flow [2024-06-04 15:05:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:05:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:05:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 15:05:56,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-04 15:05:56,335 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 346 flow. Second operand 8 states and 155 transitions. [2024-06-04 15:05:56,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 596 flow [2024-06-04 15:05:56,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 546 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:05:56,342 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 365 flow [2024-06-04 15:05:56,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-04 15:05:56,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-04 15:05:56,343 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 365 flow [2024-06-04 15:05:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:56,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:56,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:56,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:05:56,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:56,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2038880934, now seen corresponding path program 1 times [2024-06-04 15:05:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138670198] [2024-06-04 15:05:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:57,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:57,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138670198] [2024-06-04 15:05:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138670198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:57,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:57,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:05:57,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19753085] [2024-06-04 15:05:57,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:05:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:05:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:05:57,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:05:57,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:57,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:57,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:05:57,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:57,618 INFO L124 PetriNetUnfolderBase]: 1358/2215 cut-off events. [2024-06-04 15:05:57,619 INFO L125 PetriNetUnfolderBase]: For 11515/11515 co-relation queries the response was YES. [2024-06-04 15:05:57,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2215 events. 1358/2215 cut-off events. For 11515/11515 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11280 event pairs, 514 based on Foata normal form. 1/2201 useless extension candidates. Maximal degree in co-relation 8497. Up to 2024 conditions per place. [2024-06-04 15:05:57,631 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 61 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2024-06-04 15:05:57,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 543 flow [2024-06-04 15:05:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:05:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:05:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-04 15:05:57,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-04 15:05:57,633 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 365 flow. Second operand 5 states and 97 transitions. [2024-06-04 15:05:57,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 543 flow [2024-06-04 15:05:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 492 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:05:57,639 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 362 flow [2024-06-04 15:05:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-04 15:05:57,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-04 15:05:57,640 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 362 flow [2024-06-04 15:05:57,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:57,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:57,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:05:57,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1842577589, now seen corresponding path program 1 times [2024-06-04 15:05:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230265413] [2024-06-04 15:05:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:58,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230265413] [2024-06-04 15:05:58,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230265413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:58,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:58,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:05:58,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488658743] [2024-06-04 15:05:58,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:05:58,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:05:58,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:05:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:05:58,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 362 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:58,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:05:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:59,430 INFO L124 PetriNetUnfolderBase]: 1576/2451 cut-off events. [2024-06-04 15:05:59,430 INFO L125 PetriNetUnfolderBase]: For 15617/15617 co-relation queries the response was YES. [2024-06-04 15:05:59,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10050 conditions, 2451 events. 1576/2451 cut-off events. For 15617/15617 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11985 event pairs, 563 based on Foata normal form. 2/2452 useless extension candidates. Maximal degree in co-relation 10022. Up to 2298 conditions per place. [2024-06-04 15:05:59,442 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-06-04 15:05:59,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 674 flow [2024-06-04 15:05:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:05:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:05:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:05:59,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:05:59,443 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 362 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:05:59,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 674 flow [2024-06-04 15:05:59,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 648 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:05:59,450 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 450 flow [2024-06-04 15:05:59,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=450, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-04 15:05:59,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-04 15:05:59,451 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 450 flow [2024-06-04 15:05:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:59,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:59,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:59,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:05:59,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:59,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1248661323, now seen corresponding path program 2 times [2024-06-04 15:05:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:59,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570361649] [2024-06-04 15:05:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:00,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570361649] [2024-06-04 15:06:00,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570361649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:00,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:00,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410918822] [2024-06-04 15:06:00,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:00,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:00,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:00,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 450 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:00,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:00,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:00,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:01,213 INFO L124 PetriNetUnfolderBase]: 1587/2474 cut-off events. [2024-06-04 15:06:01,214 INFO L125 PetriNetUnfolderBase]: For 18662/18666 co-relation queries the response was YES. [2024-06-04 15:06:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10852 conditions, 2474 events. 1587/2474 cut-off events. For 18662/18666 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12119 event pairs, 570 based on Foata normal form. 6/2479 useless extension candidates. Maximal degree in co-relation 10821. Up to 2244 conditions per place. [2024-06-04 15:06:01,236 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2024-06-04 15:06:01,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 868 flow [2024-06-04 15:06:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:06:01,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:06:01,238 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 450 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:06:01,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 868 flow [2024-06-04 15:06:01,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 816 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:06:01,254 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 607 flow [2024-06-04 15:06:01,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-04 15:06:01,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-04 15:06:01,255 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 607 flow [2024-06-04 15:06:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:01,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:01,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:01,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:06:01,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:01,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2141102939, now seen corresponding path program 3 times [2024-06-04 15:06:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:01,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69661485] [2024-06-04 15:06:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:01,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69661485] [2024-06-04 15:06:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69661485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:02,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:02,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:02,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729925837] [2024-06-04 15:06:02,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:02,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:02,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:02,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:02,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:02,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:02,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:02,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:03,183 INFO L124 PetriNetUnfolderBase]: 1609/2506 cut-off events. [2024-06-04 15:06:03,184 INFO L125 PetriNetUnfolderBase]: For 21907/21911 co-relation queries the response was YES. [2024-06-04 15:06:03,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11624 conditions, 2506 events. 1609/2506 cut-off events. For 21907/21911 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12296 event pairs, 570 based on Foata normal form. 6/2511 useless extension candidates. Maximal degree in co-relation 11590. Up to 2301 conditions per place. [2024-06-04 15:06:03,202 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-04 15:06:03,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 948 flow [2024-06-04 15:06:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:06:03,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:06:03,204 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 607 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:06:03,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 948 flow [2024-06-04 15:06:03,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 910 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 15:06:03,220 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 702 flow [2024-06-04 15:06:03,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-04 15:06:03,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-04 15:06:03,221 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 702 flow [2024-06-04 15:06:03,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:03,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:03,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:03,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:06:03,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:03,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2146512707, now seen corresponding path program 4 times [2024-06-04 15:06:03,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:03,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947099161] [2024-06-04 15:06:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:03,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947099161] [2024-06-04 15:06:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947099161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309110461] [2024-06-04 15:06:04,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:04,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:04,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 702 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:04,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:04,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:04,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:04,818 INFO L124 PetriNetUnfolderBase]: 1604/2499 cut-off events. [2024-06-04 15:06:04,818 INFO L125 PetriNetUnfolderBase]: For 23742/23746 co-relation queries the response was YES. [2024-06-04 15:06:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 2499 events. 1604/2499 cut-off events. For 23742/23746 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12253 event pairs, 570 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 11605. Up to 2294 conditions per place. [2024-06-04 15:06:04,830 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-04 15:06:04,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 117 transitions, 984 flow [2024-06-04 15:06:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:06:04,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:06:04,832 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 702 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:06:04,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 117 transitions, 984 flow [2024-06-04 15:06:04,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 886 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 15:06:04,847 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 670 flow [2024-06-04 15:06:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2024-06-04 15:06:04,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-04 15:06:04,848 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 670 flow [2024-06-04 15:06:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:04,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:04,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:06:04,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:04,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1188815514, now seen corresponding path program 1 times [2024-06-04 15:06:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:04,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059731695] [2024-06-04 15:06:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:04,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:05,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059731695] [2024-06-04 15:06:05,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059731695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:05,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:05,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:06:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130754980] [2024-06-04 15:06:05,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:05,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:06:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:06:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:06:05,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:05,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 670 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:05,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:05,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:05,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:06,395 INFO L124 PetriNetUnfolderBase]: 1601/2502 cut-off events. [2024-06-04 15:06:06,396 INFO L125 PetriNetUnfolderBase]: For 25923/25923 co-relation queries the response was YES. [2024-06-04 15:06:06,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11788 conditions, 2502 events. 1601/2502 cut-off events. For 25923/25923 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12252 event pairs, 562 based on Foata normal form. 1/2502 useless extension candidates. Maximal degree in co-relation 11751. Up to 2371 conditions per place. [2024-06-04 15:06:06,435 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 90 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-04 15:06:06,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 918 flow [2024-06-04 15:06:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:06:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:06:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 15:06:06,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-04 15:06:06,446 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 670 flow. Second operand 6 states and 107 transitions. [2024-06-04 15:06:06,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 918 flow [2024-06-04 15:06:06,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 816 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:06,486 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 626 flow [2024-06-04 15:06:06,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=626, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-04 15:06:06,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-04 15:06:06,488 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 626 flow [2024-06-04 15:06:06,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:06,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:06,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:06:06,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:06,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1499821325, now seen corresponding path program 1 times [2024-06-04 15:06:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:06,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521914971] [2024-06-04 15:06:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:06,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521914971] [2024-06-04 15:06:07,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521914971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:07,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:07,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:07,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368098466] [2024-06-04 15:06:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:07,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:07,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:07,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:07,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 626 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:07,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:08,654 INFO L124 PetriNetUnfolderBase]: 1615/2539 cut-off events. [2024-06-04 15:06:08,654 INFO L125 PetriNetUnfolderBase]: For 35303/35303 co-relation queries the response was YES. [2024-06-04 15:06:08,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 2539 events. 1615/2539 cut-off events. For 35303/35303 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12938 event pairs, 417 based on Foata normal form. 4/2542 useless extension candidates. Maximal degree in co-relation 12957. Up to 2285 conditions per place. [2024-06-04 15:06:08,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2024-06-04 15:06:08,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 978 flow [2024-06-04 15:06:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 15:06:08,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-04 15:06:08,679 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 626 flow. Second operand 8 states and 161 transitions. [2024-06-04 15:06:08,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 978 flow [2024-06-04 15:06:08,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 942 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:06:08,701 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 665 flow [2024-06-04 15:06:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-04 15:06:08,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-04 15:06:08,702 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 665 flow [2024-06-04 15:06:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:08,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:08,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:06:08,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash 739860589, now seen corresponding path program 2 times [2024-06-04 15:06:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:08,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814320117] [2024-06-04 15:06:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:08,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:10,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814320117] [2024-06-04 15:06:10,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814320117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:10,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88285417] [2024-06-04 15:06:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:10,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:10,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:10,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:10,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:10,957 INFO L124 PetriNetUnfolderBase]: 1667/2627 cut-off events. [2024-06-04 15:06:10,957 INFO L125 PetriNetUnfolderBase]: For 40518/40518 co-relation queries the response was YES. [2024-06-04 15:06:10,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2627 events. 1667/2627 cut-off events. For 40518/40518 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13469 event pairs, 535 based on Foata normal form. 4/2630 useless extension candidates. Maximal degree in co-relation 13846. Up to 2374 conditions per place. [2024-06-04 15:06:10,975 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2024-06-04 15:06:10,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 139 transitions, 1114 flow [2024-06-04 15:06:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:06:10,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-04 15:06:10,977 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 665 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:06:10,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 139 transitions, 1114 flow [2024-06-04 15:06:11,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1039 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:06:11,002 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 798 flow [2024-06-04 15:06:11,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=798, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2024-06-04 15:06:11,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-04 15:06:11,003 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 798 flow [2024-06-04 15:06:11,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:11,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:11,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:06:11,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:11,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1058290025, now seen corresponding path program 3 times [2024-06-04 15:06:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691523836] [2024-06-04 15:06:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:11,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:12,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:12,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691523836] [2024-06-04 15:06:12,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691523836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:12,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:12,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196367106] [2024-06-04 15:06:12,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:12,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:12,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 798 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:12,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:12,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:12,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:12,903 INFO L124 PetriNetUnfolderBase]: 1732/2740 cut-off events. [2024-06-04 15:06:12,903 INFO L125 PetriNetUnfolderBase]: For 45668/45672 co-relation queries the response was YES. [2024-06-04 15:06:12,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14928 conditions, 2740 events. 1732/2740 cut-off events. For 45668/45672 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14055 event pairs, 515 based on Foata normal form. 8/2747 useless extension candidates. Maximal degree in co-relation 14886. Up to 2450 conditions per place. [2024-06-04 15:06:12,952 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 116 selfloop transitions, 37 changer transitions 0/163 dead transitions. [2024-06-04 15:06:12,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1374 flow [2024-06-04 15:06:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:06:12,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-04 15:06:12,953 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 798 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:06:12,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1374 flow [2024-06-04 15:06:12,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 163 transitions, 1278 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-04 15:06:12,983 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1011 flow [2024-06-04 15:06:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1011, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-04 15:06:12,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-04 15:06:12,984 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1011 flow [2024-06-04 15:06:12,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:12,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:12,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:06:12,985 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:12,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash 857948269, now seen corresponding path program 4 times [2024-06-04 15:06:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:12,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761078261] [2024-06-04 15:06:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:12,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:14,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761078261] [2024-06-04 15:06:14,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761078261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:14,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:14,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:14,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402127663] [2024-06-04 15:06:14,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:14,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:14,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:14,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:14,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:14,950 INFO L124 PetriNetUnfolderBase]: 1735/2750 cut-off events. [2024-06-04 15:06:14,950 INFO L125 PetriNetUnfolderBase]: For 51857/51861 co-relation queries the response was YES. [2024-06-04 15:06:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15464 conditions, 2750 events. 1735/2750 cut-off events. For 51857/51861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14212 event pairs, 530 based on Foata normal form. 8/2755 useless extension candidates. Maximal degree in co-relation 15418. Up to 2492 conditions per place. [2024-06-04 15:06:14,967 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 22 changer transitions 0/159 dead transitions. [2024-06-04 15:06:14,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1437 flow [2024-06-04 15:06:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:06:14,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-04 15:06:14,977 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1011 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:06:14,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1437 flow [2024-06-04 15:06:15,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1347 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:06:15,008 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1022 flow [2024-06-04 15:06:15,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-04 15:06:15,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-04 15:06:15,009 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1022 flow [2024-06-04 15:06:15,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:15,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:15,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:15,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:06:15,010 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2116961189, now seen corresponding path program 1 times [2024-06-04 15:06:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711345307] [2024-06-04 15:06:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:16,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:16,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711345307] [2024-06-04 15:06:16,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711345307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:16,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:16,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:16,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120375663] [2024-06-04 15:06:16,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:16,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:16,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1022 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:16,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:16,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:16,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:17,413 INFO L124 PetriNetUnfolderBase]: 1934/3009 cut-off events. [2024-06-04 15:06:17,413 INFO L125 PetriNetUnfolderBase]: For 55857/55861 co-relation queries the response was YES. [2024-06-04 15:06:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16375 conditions, 3009 events. 1934/3009 cut-off events. For 55857/55861 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15157 event pairs, 520 based on Foata normal form. 6/3014 useless extension candidates. Maximal degree in co-relation 16328. Up to 2716 conditions per place. [2024-06-04 15:06:17,436 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 121 selfloop transitions, 49 changer transitions 0/176 dead transitions. [2024-06-04 15:06:17,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 176 transitions, 1586 flow [2024-06-04 15:06:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:06:17,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:06:17,438 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1022 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:06:17,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 176 transitions, 1586 flow [2024-06-04 15:06:17,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 176 transitions, 1492 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:17,485 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1184 flow [2024-06-04 15:06:17,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1184, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-04 15:06:17,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-04 15:06:17,486 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1184 flow [2024-06-04 15:06:17,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:17,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:17,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:17,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:06:17,486 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:17,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash 858132719, now seen corresponding path program 2 times [2024-06-04 15:06:17,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:17,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387376366] [2024-06-04 15:06:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:17,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:18,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387376366] [2024-06-04 15:06:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387376366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:18,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497403351] [2024-06-04 15:06:18,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:18,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:18,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:18,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1184 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:18,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:19,684 INFO L124 PetriNetUnfolderBase]: 1961/3038 cut-off events. [2024-06-04 15:06:19,684 INFO L125 PetriNetUnfolderBase]: For 61789/61789 co-relation queries the response was YES. [2024-06-04 15:06:19,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3038 events. 1961/3038 cut-off events. For 61789/61789 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15197 event pairs, 468 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 17267. Up to 2680 conditions per place. [2024-06-04 15:06:19,704 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 113 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2024-06-04 15:06:19,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 185 transitions, 1842 flow [2024-06-04 15:06:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:06:19,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:06:19,707 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1184 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:06:19,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 185 transitions, 1842 flow [2024-06-04 15:06:19,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1691 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:19,758 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1329 flow [2024-06-04 15:06:19,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1329, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-04 15:06:19,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-04 15:06:19,772 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1329 flow [2024-06-04 15:06:19,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:19,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:19,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:19,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:06:19,772 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:19,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 857953229, now seen corresponding path program 3 times [2024-06-04 15:06:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:19,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729538337] [2024-06-04 15:06:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:19,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:21,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729538337] [2024-06-04 15:06:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729538337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:21,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:21,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740768741] [2024-06-04 15:06:21,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:21,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:21,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:21,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:21,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:22,629 INFO L124 PetriNetUnfolderBase]: 1983/3078 cut-off events. [2024-06-04 15:06:22,629 INFO L125 PetriNetUnfolderBase]: For 68898/68902 co-relation queries the response was YES. [2024-06-04 15:06:22,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18112 conditions, 3078 events. 1983/3078 cut-off events. For 68898/68902 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15535 event pairs, 540 based on Foata normal form. 6/3083 useless extension candidates. Maximal degree in co-relation 18063. Up to 2836 conditions per place. [2024-06-04 15:06:22,649 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2024-06-04 15:06:22,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 195 transitions, 1977 flow [2024-06-04 15:06:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:06:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:06:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:06:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:06:22,651 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1329 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:06:22,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 195 transitions, 1977 flow [2024-06-04 15:06:22,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1899 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 15:06:22,691 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1405 flow [2024-06-04 15:06:22,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1405, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-04 15:06:22,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-04 15:06:22,692 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1405 flow [2024-06-04 15:06:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:06:22,692 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 233997467, now seen corresponding path program 1 times [2024-06-04 15:06:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288946088] [2024-06-04 15:06:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288946088] [2024-06-04 15:06:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288946088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:23,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419594334] [2024-06-04 15:06:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:23,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:23,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:23,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:23,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:24,656 INFO L124 PetriNetUnfolderBase]: 2000/3105 cut-off events. [2024-06-04 15:06:24,656 INFO L125 PetriNetUnfolderBase]: For 74386/74390 co-relation queries the response was YES. [2024-06-04 15:06:24,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18391 conditions, 3105 events. 2000/3105 cut-off events. For 74386/74390 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15723 event pairs, 536 based on Foata normal form. 8/3112 useless extension candidates. Maximal degree in co-relation 18340. Up to 2883 conditions per place. [2024-06-04 15:06:24,676 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 163 selfloop transitions, 23 changer transitions 0/192 dead transitions. [2024-06-04 15:06:24,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 192 transitions, 1911 flow [2024-06-04 15:06:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:06:24,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:06:24,678 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1405 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:06:24,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 192 transitions, 1911 flow [2024-06-04 15:06:24,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 192 transitions, 1767 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:24,733 INFO L231 Difference]: Finished difference. Result has 124 places, 162 transitions, 1358 flow [2024-06-04 15:06:24,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=124, PETRI_TRANSITIONS=162} [2024-06-04 15:06:24,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-04 15:06:24,733 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 162 transitions, 1358 flow [2024-06-04 15:06:24,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:24,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:24,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:24,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:06:24,734 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:24,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1495056625, now seen corresponding path program 4 times [2024-06-04 15:06:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:24,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784493745] [2024-06-04 15:06:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:24,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:25,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784493745] [2024-06-04 15:06:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784493745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:25,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737230329] [2024-06-04 15:06:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:25,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:26,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:26,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 162 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:26,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:26,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:26,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:26,707 INFO L124 PetriNetUnfolderBase]: 1995/3098 cut-off events. [2024-06-04 15:06:26,708 INFO L125 PetriNetUnfolderBase]: For 78626/78630 co-relation queries the response was YES. [2024-06-04 15:06:26,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18525 conditions, 3098 events. 1995/3098 cut-off events. For 78626/78630 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15653 event pairs, 538 based on Foata normal form. 6/3103 useless extension candidates. Maximal degree in co-relation 18474. Up to 2867 conditions per place. [2024-06-04 15:06:26,728 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 156 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-04 15:06:26,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 191 transitions, 1820 flow [2024-06-04 15:06:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:06:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:06:26,729 INFO L175 Difference]: Start difference. First operand has 124 places, 162 transitions, 1358 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:06:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 191 transitions, 1820 flow [2024-06-04 15:06:26,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1695 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:26,791 INFO L231 Difference]: Finished difference. Result has 126 places, 162 transitions, 1299 flow [2024-06-04 15:06:26,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1299, PETRI_PLACES=126, PETRI_TRANSITIONS=162} [2024-06-04 15:06:26,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-04 15:06:26,792 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 162 transitions, 1299 flow [2024-06-04 15:06:26,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:26,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:26,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:26,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:06:26,792 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:26,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash -827561541, now seen corresponding path program 1 times [2024-06-04 15:06:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339605952] [2024-06-04 15:06:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:26,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:27,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:27,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339605952] [2024-06-04 15:06:27,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339605952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:27,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:06:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327471108] [2024-06-04 15:06:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:27,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:06:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:06:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:06:27,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:27,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 162 transitions, 1299 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:27,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:27,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:27,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:28,236 INFO L124 PetriNetUnfolderBase]: 2033/3139 cut-off events. [2024-06-04 15:06:28,236 INFO L125 PetriNetUnfolderBase]: For 83223/83223 co-relation queries the response was YES. [2024-06-04 15:06:28,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18874 conditions, 3139 events. 2033/3139 cut-off events. For 83223/83223 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15691 event pairs, 519 based on Foata normal form. 2/3140 useless extension candidates. Maximal degree in co-relation 18822. Up to 2907 conditions per place. [2024-06-04 15:06:28,255 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 148 selfloop transitions, 31 changer transitions 0/185 dead transitions. [2024-06-04 15:06:28,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1825 flow [2024-06-04 15:06:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:06:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:06:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-04 15:06:28,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-04 15:06:28,258 INFO L175 Difference]: Start difference. First operand has 126 places, 162 transitions, 1299 flow. Second operand 6 states and 118 transitions. [2024-06-04 15:06:28,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1825 flow [2024-06-04 15:06:28,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 185 transitions, 1735 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:28,293 INFO L231 Difference]: Finished difference. Result has 124 places, 168 transitions, 1348 flow [2024-06-04 15:06:28,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=124, PETRI_TRANSITIONS=168} [2024-06-04 15:06:28,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-04 15:06:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 168 transitions, 1348 flow [2024-06-04 15:06:28,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:28,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:28,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:28,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:06:28,295 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:28,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2117200963, now seen corresponding path program 5 times [2024-06-04 15:06:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:28,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932389210] [2024-06-04 15:06:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:28,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:29,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932389210] [2024-06-04 15:06:29,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932389210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:29,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:29,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:29,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217088150] [2024-06-04 15:06:29,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:29,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:29,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:29,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:29,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 168 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:29,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:29,875 INFO L124 PetriNetUnfolderBase]: 1909/3024 cut-off events. [2024-06-04 15:06:29,875 INFO L125 PetriNetUnfolderBase]: For 91463/91469 co-relation queries the response was YES. [2024-06-04 15:06:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 3024 events. 1909/3024 cut-off events. For 91463/91469 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15922 event pairs, 550 based on Foata normal form. 14/3028 useless extension candidates. Maximal degree in co-relation 19027. Up to 2656 conditions per place. [2024-06-04 15:06:29,897 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 39 changer transitions 0/193 dead transitions. [2024-06-04 15:06:29,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 1834 flow [2024-06-04 15:06:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:06:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:06:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:06:29,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-04 15:06:29,899 INFO L175 Difference]: Start difference. First operand has 124 places, 168 transitions, 1348 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:06:29,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 1834 flow [2024-06-04 15:06:29,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 1801 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-04 15:06:29,964 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 1460 flow [2024-06-04 15:06:29,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1460, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2024-06-04 15:06:29,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-04 15:06:29,964 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 1460 flow [2024-06-04 15:06:29,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:29,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:29,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:29,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:06:29,965 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:29,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash -985747217, now seen corresponding path program 6 times [2024-06-04 15:06:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:29,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206516994] [2024-06-04 15:06:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:29,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206516994] [2024-06-04 15:06:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206516994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:31,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:06:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094698139] [2024-06-04 15:06:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:31,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:06:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:06:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:06:31,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:31,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:31,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:31,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:31,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:31,820 INFO L124 PetriNetUnfolderBase]: 1965/3135 cut-off events. [2024-06-04 15:06:31,821 INFO L125 PetriNetUnfolderBase]: For 98983/98985 co-relation queries the response was YES. [2024-06-04 15:06:31,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19816 conditions, 3135 events. 1965/3135 cut-off events. For 98983/98985 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16497 event pairs, 457 based on Foata normal form. 10/3144 useless extension candidates. Maximal degree in co-relation 19761. Up to 2726 conditions per place. [2024-06-04 15:06:31,844 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 158 selfloop transitions, 58 changer transitions 0/228 dead transitions. [2024-06-04 15:06:31,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 228 transitions, 2301 flow [2024-06-04 15:06:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:06:31,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-04 15:06:31,846 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 1460 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:06:31,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 228 transitions, 2301 flow [2024-06-04 15:06:31,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 228 transitions, 2144 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:31,945 INFO L231 Difference]: Finished difference. Result has 135 places, 199 transitions, 1846 flow [2024-06-04 15:06:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=135, PETRI_TRANSITIONS=199} [2024-06-04 15:06:31,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-04 15:06:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 199 transitions, 1846 flow [2024-06-04 15:06:31,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:31,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:31,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:06:31,946 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash -62068375, now seen corresponding path program 2 times [2024-06-04 15:06:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623855727] [2024-06-04 15:06:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:33,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623855727] [2024-06-04 15:06:33,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623855727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:33,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:33,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869169724] [2024-06-04 15:06:33,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:33,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:33,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:33,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 199 transitions, 1846 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:33,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:33,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:33,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:33,893 INFO L124 PetriNetUnfolderBase]: 2161/3339 cut-off events. [2024-06-04 15:06:33,894 INFO L125 PetriNetUnfolderBase]: For 104718/104722 co-relation queries the response was YES. [2024-06-04 15:06:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21168 conditions, 3339 events. 2161/3339 cut-off events. For 104718/104722 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16926 event pairs, 563 based on Foata normal form. 8/3346 useless extension candidates. Maximal degree in co-relation 21110. Up to 3063 conditions per place. [2024-06-04 15:06:33,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-04 15:06:33,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 228 transitions, 2430 flow [2024-06-04 15:06:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:06:33,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:06:33,923 INFO L175 Difference]: Start difference. First operand has 135 places, 199 transitions, 1846 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:06:33,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 228 transitions, 2430 flow [2024-06-04 15:06:34,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 228 transitions, 2335 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 15:06:34,091 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1888 flow [2024-06-04 15:06:34,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-06-04 15:06:34,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-04 15:06:34,096 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1888 flow [2024-06-04 15:06:34,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:34,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:34,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:06:34,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:34,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2117378903, now seen corresponding path program 5 times [2024-06-04 15:06:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:34,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937917257] [2024-06-04 15:06:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:35,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937917257] [2024-06-04 15:06:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937917257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:35,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:35,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:35,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445290281] [2024-06-04 15:06:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:35,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:35,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1888 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:35,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:35,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:35,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:36,466 INFO L124 PetriNetUnfolderBase]: 2194/3397 cut-off events. [2024-06-04 15:06:36,467 INFO L125 PetriNetUnfolderBase]: For 109926/109930 co-relation queries the response was YES. [2024-06-04 15:06:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 3397 events. 2194/3397 cut-off events. For 109926/109930 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17376 event pairs, 563 based on Foata normal form. 6/3402 useless extension candidates. Maximal degree in co-relation 21564. Up to 3066 conditions per place. [2024-06-04 15:06:36,492 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 50 changer transitions 0/237 dead transitions. [2024-06-04 15:06:36,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2546 flow [2024-06-04 15:06:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:06:36,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:06:36,493 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1888 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:06:36,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2546 flow [2024-06-04 15:06:36,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 2427 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:36,586 INFO L231 Difference]: Finished difference. Result has 144 places, 211 transitions, 2001 flow [2024-06-04 15:06:36,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=144, PETRI_TRANSITIONS=211} [2024-06-04 15:06:36,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-04 15:06:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 211 transitions, 2001 flow [2024-06-04 15:06:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:36,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:36,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:36,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:06:36,588 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:36,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1941406275, now seen corresponding path program 3 times [2024-06-04 15:06:36,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:36,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950818590] [2024-06-04 15:06:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:36,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:37,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950818590] [2024-06-04 15:06:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950818590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:37,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:37,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78137487] [2024-06-04 15:06:37,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:37,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:37,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 211 transitions, 2001 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:37,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:37,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:37,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:38,447 INFO L124 PetriNetUnfolderBase]: 2211/3424 cut-off events. [2024-06-04 15:06:38,447 INFO L125 PetriNetUnfolderBase]: For 119437/119441 co-relation queries the response was YES. [2024-06-04 15:06:38,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22480 conditions, 3424 events. 2211/3424 cut-off events. For 119437/119441 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17518 event pairs, 563 based on Foata normal form. 8/3431 useless extension candidates. Maximal degree in co-relation 22419. Up to 3102 conditions per place. [2024-06-04 15:06:38,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-04 15:06:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 2615 flow [2024-06-04 15:06:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:06:38,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:06:38,481 INFO L175 Difference]: Start difference. First operand has 144 places, 211 transitions, 2001 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:06:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 2615 flow [2024-06-04 15:06:38,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 240 transitions, 2473 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 15:06:38,578 INFO L231 Difference]: Finished difference. Result has 149 places, 213 transitions, 2024 flow [2024-06-04 15:06:38,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2024, PETRI_PLACES=149, PETRI_TRANSITIONS=213} [2024-06-04 15:06:38,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-04 15:06:38,579 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 213 transitions, 2024 flow [2024-06-04 15:06:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:38,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:38,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:38,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:06:38,580 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:38,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2117385661, now seen corresponding path program 4 times [2024-06-04 15:06:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:38,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250641209] [2024-06-04 15:06:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250641209] [2024-06-04 15:06:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250641209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:39,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:39,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918652551] [2024-06-04 15:06:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:39,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:39,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:39,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:39,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:39,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 213 transitions, 2024 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:39,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:39,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:40,539 INFO L124 PetriNetUnfolderBase]: 2228/3451 cut-off events. [2024-06-04 15:06:40,540 INFO L125 PetriNetUnfolderBase]: For 127342/127346 co-relation queries the response was YES. [2024-06-04 15:06:40,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23008 conditions, 3451 events. 2228/3451 cut-off events. For 127342/127346 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17696 event pairs, 568 based on Foata normal form. 8/3458 useless extension candidates. Maximal degree in co-relation 22946. Up to 3165 conditions per place. [2024-06-04 15:06:40,578 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 38 changer transitions 0/242 dead transitions. [2024-06-04 15:06:40,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 242 transitions, 2646 flow [2024-06-04 15:06:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:06:40,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:06:40,581 INFO L175 Difference]: Start difference. First operand has 149 places, 213 transitions, 2024 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:06:40,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 242 transitions, 2646 flow [2024-06-04 15:06:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 242 transitions, 2499 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:40,730 INFO L231 Difference]: Finished difference. Result has 151 places, 215 transitions, 2022 flow [2024-06-04 15:06:40,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2022, PETRI_PLACES=151, PETRI_TRANSITIONS=215} [2024-06-04 15:06:40,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-04 15:06:40,731 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 215 transitions, 2022 flow [2024-06-04 15:06:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:40,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:40,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:06:40,732 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2117385413, now seen corresponding path program 6 times [2024-06-04 15:06:40,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503412718] [2024-06-04 15:06:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:42,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:42,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503412718] [2024-06-04 15:06:42,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503412718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466978630] [2024-06-04 15:06:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:42,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:42,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 215 transitions, 2022 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:42,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:42,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:43,757 INFO L124 PetriNetUnfolderBase]: 2255/3495 cut-off events. [2024-06-04 15:06:43,757 INFO L125 PetriNetUnfolderBase]: For 135691/135695 co-relation queries the response was YES. [2024-06-04 15:06:43,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23693 conditions, 3495 events. 2255/3495 cut-off events. For 135691/135695 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17934 event pairs, 568 based on Foata normal form. 6/3500 useless extension candidates. Maximal degree in co-relation 23630. Up to 3130 conditions per place. [2024-06-04 15:06:43,791 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 188 selfloop transitions, 59 changer transitions 0/253 dead transitions. [2024-06-04 15:06:43,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2906 flow [2024-06-04 15:06:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:06:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:06:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:06:43,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:06:43,793 INFO L175 Difference]: Start difference. First operand has 151 places, 215 transitions, 2022 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:06:43,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2906 flow [2024-06-04 15:06:43,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 253 transitions, 2779 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:43,941 INFO L231 Difference]: Finished difference. Result has 154 places, 221 transitions, 2191 flow [2024-06-04 15:06:43,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2191, PETRI_PLACES=154, PETRI_TRANSITIONS=221} [2024-06-04 15:06:43,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-04 15:06:43,941 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 221 transitions, 2191 flow [2024-06-04 15:06:43,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:43,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:43,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:06:43,942 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:43,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash 131417657, now seen corresponding path program 7 times [2024-06-04 15:06:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294866070] [2024-06-04 15:06:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294866070] [2024-06-04 15:06:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294866070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:45,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:45,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011332896] [2024-06-04 15:06:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:45,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:45,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:45,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:45,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 221 transitions, 2191 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:45,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:45,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:46,681 INFO L124 PetriNetUnfolderBase]: 2250/3488 cut-off events. [2024-06-04 15:06:46,681 INFO L125 PetriNetUnfolderBase]: For 143018/143022 co-relation queries the response was YES. [2024-06-04 15:06:46,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24042 conditions, 3488 events. 2250/3488 cut-off events. For 143018/143022 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17900 event pairs, 568 based on Foata normal form. 6/3493 useless extension candidates. Maximal degree in co-relation 23978. Up to 3152 conditions per place. [2024-06-04 15:06:46,711 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 190 selfloop transitions, 51 changer transitions 0/247 dead transitions. [2024-06-04 15:06:46,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 247 transitions, 2763 flow [2024-06-04 15:06:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:06:46,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:06:46,713 INFO L175 Difference]: Start difference. First operand has 154 places, 221 transitions, 2191 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:06:46,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 247 transitions, 2763 flow [2024-06-04 15:06:46,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 247 transitions, 2564 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-04 15:06:46,864 INFO L231 Difference]: Finished difference. Result has 157 places, 221 transitions, 2102 flow [2024-06-04 15:06:46,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=157, PETRI_TRANSITIONS=221} [2024-06-04 15:06:46,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-04 15:06:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 221 transitions, 2102 flow [2024-06-04 15:06:46,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:46,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:06:46,865 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:46,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1941406523, now seen corresponding path program 8 times [2024-06-04 15:06:46,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:46,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248644209] [2024-06-04 15:06:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:48,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248644209] [2024-06-04 15:06:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248644209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:48,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:48,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543643641] [2024-06-04 15:06:48,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:48,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:48,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 221 transitions, 2102 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:49,706 INFO L124 PetriNetUnfolderBase]: 2261/3504 cut-off events. [2024-06-04 15:06:49,707 INFO L125 PetriNetUnfolderBase]: For 150492/150496 co-relation queries the response was YES. [2024-06-04 15:06:49,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24385 conditions, 3504 events. 2261/3504 cut-off events. For 150492/150496 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18061 event pairs, 568 based on Foata normal form. 6/3509 useless extension candidates. Maximal degree in co-relation 24319. Up to 3053 conditions per place. [2024-06-04 15:06:49,737 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 171 selfloop transitions, 88 changer transitions 0/265 dead transitions. [2024-06-04 15:06:49,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 265 transitions, 3064 flow [2024-06-04 15:06:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:06:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:06:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-04 15:06:49,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:06:49,739 INFO L175 Difference]: Start difference. First operand has 157 places, 221 transitions, 2102 flow. Second operand 11 states and 209 transitions. [2024-06-04 15:06:49,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 265 transitions, 3064 flow [2024-06-04 15:06:49,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 265 transitions, 2932 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:49,844 INFO L231 Difference]: Finished difference. Result has 160 places, 229 transitions, 2357 flow [2024-06-04 15:06:49,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2357, PETRI_PLACES=160, PETRI_TRANSITIONS=229} [2024-06-04 15:06:49,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-04 15:06:49,845 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 229 transitions, 2357 flow [2024-06-04 15:06:49,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:49,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:49,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:49,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:06:49,845 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:49,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash -53497495, now seen corresponding path program 5 times [2024-06-04 15:06:49,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:49,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700415419] [2024-06-04 15:06:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:49,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700415419] [2024-06-04 15:06:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700415419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534232168] [2024-06-04 15:06:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:51,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:51,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 229 transitions, 2357 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:51,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:51,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:51,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:51,807 INFO L124 PetriNetUnfolderBase]: 2373/3688 cut-off events. [2024-06-04 15:06:51,808 INFO L125 PetriNetUnfolderBase]: For 173015/173019 co-relation queries the response was YES. [2024-06-04 15:06:51,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26631 conditions, 3688 events. 2373/3688 cut-off events. For 173015/173019 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19376 event pairs, 559 based on Foata normal form. 8/3695 useless extension candidates. Maximal degree in co-relation 26564. Up to 2913 conditions per place. [2024-06-04 15:06:51,838 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 172 selfloop transitions, 93 changer transitions 0/271 dead transitions. [2024-06-04 15:06:51,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 271 transitions, 3427 flow [2024-06-04 15:06:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-04 15:06:51,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-04 15:06:51,839 INFO L175 Difference]: Start difference. First operand has 160 places, 229 transitions, 2357 flow. Second operand 9 states and 181 transitions. [2024-06-04 15:06:51,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 271 transitions, 3427 flow [2024-06-04 15:06:52,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 271 transitions, 3195 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-04 15:06:52,029 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2491 flow [2024-06-04 15:06:52,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2491, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-04 15:06:52,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-04 15:06:52,030 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2491 flow [2024-06-04 15:06:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:52,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:06:52,031 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:52,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash -62075133, now seen corresponding path program 9 times [2024-06-04 15:06:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071486307] [2024-06-04 15:06:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:53,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:53,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071486307] [2024-06-04 15:06:53,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071486307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:53,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:53,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503958066] [2024-06-04 15:06:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:53,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:53,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:53,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2491 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:53,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:53,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:53,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:54,399 INFO L124 PetriNetUnfolderBase]: 2368/3681 cut-off events. [2024-06-04 15:06:54,399 INFO L125 PetriNetUnfolderBase]: For 178030/178034 co-relation queries the response was YES. [2024-06-04 15:06:54,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26716 conditions, 3681 events. 2368/3681 cut-off events. For 178030/178034 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19288 event pairs, 602 based on Foata normal form. 6/3686 useless extension candidates. Maximal degree in co-relation 26647. Up to 3345 conditions per place. [2024-06-04 15:06:54,433 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 54 changer transitions 0/260 dead transitions. [2024-06-04 15:06:54,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 260 transitions, 3089 flow [2024-06-04 15:06:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:06:54,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:06:54,448 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2491 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:06:54,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 260 transitions, 3089 flow [2024-06-04 15:06:54,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 260 transitions, 2868 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 15:06:54,702 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2386 flow [2024-06-04 15:06:54,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2024-06-04 15:06:54,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-04 15:06:54,702 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2386 flow [2024-06-04 15:06:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:54,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:54,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:06:54,703 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1801436739, now seen corresponding path program 2 times [2024-06-04 15:06:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766765035] [2024-06-04 15:06:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766765035] [2024-06-04 15:06:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766765035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:06:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218113660] [2024-06-04 15:06:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:06:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:06:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:06:55,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:06:55,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2386 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:55,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:55,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:06:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:56,150 INFO L124 PetriNetUnfolderBase]: 2362/3669 cut-off events. [2024-06-04 15:06:56,150 INFO L125 PetriNetUnfolderBase]: For 183121/183121 co-relation queries the response was YES. [2024-06-04 15:06:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26715 conditions, 3669 events. 2362/3669 cut-off events. For 183121/183121 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19142 event pairs, 564 based on Foata normal form. 2/3670 useless extension candidates. Maximal degree in co-relation 26644. Up to 3409 conditions per place. [2024-06-04 15:06:56,181 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 200 selfloop transitions, 38 changer transitions 0/244 dead transitions. [2024-06-04 15:06:56,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 2914 flow [2024-06-04 15:06:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:06:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:06:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:06:56,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:06:56,183 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2386 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:06:56,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 2914 flow [2024-06-04 15:06:56,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 244 transitions, 2776 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:56,307 INFO L231 Difference]: Finished difference. Result has 166 places, 234 transitions, 2330 flow [2024-06-04 15:06:56,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2330, PETRI_PLACES=166, PETRI_TRANSITIONS=234} [2024-06-04 15:06:56,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-04 15:06:56,308 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 234 transitions, 2330 flow [2024-06-04 15:06:56,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:56,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:56,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:56,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:06:56,309 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:56,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash -420868859, now seen corresponding path program 1 times [2024-06-04 15:06:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607985653] [2024-06-04 15:06:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:56,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:56,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607985653] [2024-06-04 15:06:56,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607985653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:56,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:56,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:06:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257583017] [2024-06-04 15:06:56,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:56,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:06:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:06:56,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:06:57,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:57,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 234 transitions, 2330 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:57,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:57,540 INFO L124 PetriNetUnfolderBase]: 2160/3447 cut-off events. [2024-06-04 15:06:57,540 INFO L125 PetriNetUnfolderBase]: For 166414/166414 co-relation queries the response was YES. [2024-06-04 15:06:57,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 3447 events. 2160/3447 cut-off events. For 166414/166414 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18565 event pairs, 563 based on Foata normal form. 1/3447 useless extension candidates. Maximal degree in co-relation 24382. Up to 3193 conditions per place. [2024-06-04 15:06:57,570 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 228 selfloop transitions, 17 changer transitions 0/252 dead transitions. [2024-06-04 15:06:57,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 252 transitions, 2988 flow [2024-06-04 15:06:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:06:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:06:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-04 15:06:57,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-04 15:06:57,572 INFO L175 Difference]: Start difference. First operand has 166 places, 234 transitions, 2330 flow. Second operand 6 states and 118 transitions. [2024-06-04 15:06:57,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 252 transitions, 2988 flow [2024-06-04 15:06:57,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 252 transitions, 2879 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:06:57,727 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 2323 flow [2024-06-04 15:06:57,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2323, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-04 15:06:57,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-04 15:06:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 2323 flow [2024-06-04 15:06:57,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:57,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:57,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:06:57,729 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash -828158817, now seen corresponding path program 2 times [2024-06-04 15:06:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:57,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86117601] [2024-06-04 15:06:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:58,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:58,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86117601] [2024-06-04 15:06:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86117601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:58,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:06:58,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066419863] [2024-06-04 15:06:58,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:58,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:06:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:06:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:06:58,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:06:58,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 2323 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:58,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:58,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:06:58,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:59,084 INFO L124 PetriNetUnfolderBase]: 2157/3443 cut-off events. [2024-06-04 15:06:59,084 INFO L125 PetriNetUnfolderBase]: For 172972/172972 co-relation queries the response was YES. [2024-06-04 15:06:59,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24838 conditions, 3443 events. 2157/3443 cut-off events. For 172972/172972 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18534 event pairs, 562 based on Foata normal form. 1/3443 useless extension candidates. Maximal degree in co-relation 24765. Up to 3202 conditions per place. [2024-06-04 15:06:59,119 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 229 selfloop transitions, 12 changer transitions 0/248 dead transitions. [2024-06-04 15:06:59,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 248 transitions, 2829 flow [2024-06-04 15:06:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:06:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:06:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:06:59,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:06:59,121 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 2323 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:06:59,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 248 transitions, 2829 flow [2024-06-04 15:06:59,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 248 transitions, 2780 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 15:06:59,297 INFO L231 Difference]: Finished difference. Result has 171 places, 240 transitions, 2304 flow [2024-06-04 15:06:59,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2304, PETRI_PLACES=171, PETRI_TRANSITIONS=240} [2024-06-04 15:06:59,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-04 15:06:59,298 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 240 transitions, 2304 flow [2024-06-04 15:06:59,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:06:59,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:59,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:59,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:06:59,298 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:06:59,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1801422851, now seen corresponding path program 1 times [2024-06-04 15:06:59,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:59,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184155145] [2024-06-04 15:06:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:59,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184155145] [2024-06-04 15:06:59,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184155145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:59,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:59,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:06:59,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945188163] [2024-06-04 15:06:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:59,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:06:59,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:59,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:06:59,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:00,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:00,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 240 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:00,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:00,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:00,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:00,796 INFO L124 PetriNetUnfolderBase]: 2267/3551 cut-off events. [2024-06-04 15:07:00,797 INFO L125 PetriNetUnfolderBase]: For 177860/177860 co-relation queries the response was YES. [2024-06-04 15:07:00,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25647 conditions, 3551 events. 2267/3551 cut-off events. For 177860/177860 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18648 event pairs, 598 based on Foata normal form. 2/3552 useless extension candidates. Maximal degree in co-relation 25572. Up to 3393 conditions per place. [2024-06-04 15:07:00,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 15 changer transitions 0/253 dead transitions. [2024-06-04 15:07:00,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 253 transitions, 2860 flow [2024-06-04 15:07:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:07:00,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-04 15:07:00,828 INFO L175 Difference]: Start difference. First operand has 171 places, 240 transitions, 2304 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:07:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 253 transitions, 2860 flow [2024-06-04 15:07:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 253 transitions, 2828 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 15:07:01,014 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2346 flow [2024-06-04 15:07:01,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2346, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-06-04 15:07:01,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-04 15:07:01,015 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2346 flow [2024-06-04 15:07:01,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:01,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:01,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:01,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:07:01,015 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:01,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1480111959, now seen corresponding path program 1 times [2024-06-04 15:07:01,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:01,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691889819] [2024-06-04 15:07:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:02,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691889819] [2024-06-04 15:07:02,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691889819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:02,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:02,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887466164] [2024-06-04 15:07:02,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:02,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:02,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:02,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:02,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:02,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:02,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2346 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:02,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:02,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:02,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:03,356 INFO L124 PetriNetUnfolderBase]: 2416/3784 cut-off events. [2024-06-04 15:07:03,356 INFO L125 PetriNetUnfolderBase]: For 225092/225094 co-relation queries the response was YES. [2024-06-04 15:07:03,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28709 conditions, 3784 events. 2416/3784 cut-off events. For 225092/225094 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20159 event pairs, 572 based on Foata normal form. 18/3801 useless extension candidates. Maximal degree in co-relation 28633. Up to 3328 conditions per place. [2024-06-04 15:07:03,396 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-06-04 15:07:03,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 282 transitions, 3108 flow [2024-06-04 15:07:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:07:03,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:07:03,398 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2346 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:07:03,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 282 transitions, 3108 flow [2024-06-04 15:07:03,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 282 transitions, 3056 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:07:03,648 INFO L231 Difference]: Finished difference. Result has 178 places, 244 transitions, 2497 flow [2024-06-04 15:07:03,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2497, PETRI_PLACES=178, PETRI_TRANSITIONS=244} [2024-06-04 15:07:03,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-04 15:07:03,649 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 244 transitions, 2497 flow [2024-06-04 15:07:03,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:03,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:03,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:03,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:07:03,650 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:03,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1190574717, now seen corresponding path program 2 times [2024-06-04 15:07:03,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:03,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010573541] [2024-06-04 15:07:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:03,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010573541] [2024-06-04 15:07:05,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010573541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:05,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:05,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333873484] [2024-06-04 15:07:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:05,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:05,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:05,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:05,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 244 transitions, 2497 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:05,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:05,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:06,400 INFO L124 PetriNetUnfolderBase]: 2629/4134 cut-off events. [2024-06-04 15:07:06,400 INFO L125 PetriNetUnfolderBase]: For 269110/269110 co-relation queries the response was YES. [2024-06-04 15:07:06,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33282 conditions, 4134 events. 2629/4134 cut-off events. For 269110/269110 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22590 event pairs, 574 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 33205. Up to 3241 conditions per place. [2024-06-04 15:07:06,435 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 95 changer transitions 0/288 dead transitions. [2024-06-04 15:07:06,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 288 transitions, 3556 flow [2024-06-04 15:07:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-04 15:07:06,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-04 15:07:06,436 INFO L175 Difference]: Start difference. First operand has 178 places, 244 transitions, 2497 flow. Second operand 10 states and 195 transitions. [2024-06-04 15:07:06,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 288 transitions, 3556 flow [2024-06-04 15:07:06,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 288 transitions, 3389 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:06,674 INFO L231 Difference]: Finished difference. Result has 181 places, 247 transitions, 2711 flow [2024-06-04 15:07:06,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2711, PETRI_PLACES=181, PETRI_TRANSITIONS=247} [2024-06-04 15:07:06,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-04 15:07:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 247 transitions, 2711 flow [2024-06-04 15:07:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:06,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:06,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:07:06,676 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:06,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1190567277, now seen corresponding path program 3 times [2024-06-04 15:07:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575331967] [2024-06-04 15:07:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575331967] [2024-06-04 15:07:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575331967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:07,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893784515] [2024-06-04 15:07:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:07,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:07,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 247 transitions, 2711 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:07,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:07,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:07,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:08,935 INFO L124 PetriNetUnfolderBase]: 2608/4097 cut-off events. [2024-06-04 15:07:08,935 INFO L125 PetriNetUnfolderBase]: For 271739/271739 co-relation queries the response was YES. [2024-06-04 15:07:08,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32636 conditions, 4097 events. 2608/4097 cut-off events. For 271739/271739 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22290 event pairs, 578 based on Foata normal form. 16/4112 useless extension candidates. Maximal degree in co-relation 32557. Up to 3557 conditions per place. [2024-06-04 15:07:08,970 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 186 selfloop transitions, 91 changer transitions 0/283 dead transitions. [2024-06-04 15:07:08,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 283 transitions, 3415 flow [2024-06-04 15:07:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:07:08,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-04 15:07:08,972 INFO L175 Difference]: Start difference. First operand has 181 places, 247 transitions, 2711 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:07:08,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 283 transitions, 3415 flow [2024-06-04 15:07:09,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 283 transitions, 3264 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:07:09,245 INFO L231 Difference]: Finished difference. Result has 185 places, 247 transitions, 2749 flow [2024-06-04 15:07:09,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2749, PETRI_PLACES=185, PETRI_TRANSITIONS=247} [2024-06-04 15:07:09,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-04 15:07:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 247 transitions, 2749 flow [2024-06-04 15:07:09,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:09,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:09,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:07:09,246 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:09,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 832109887, now seen corresponding path program 4 times [2024-06-04 15:07:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767017562] [2024-06-04 15:07:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:10,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767017562] [2024-06-04 15:07:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767017562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:10,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:10,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764156837] [2024-06-04 15:07:10,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:10,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:10,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:10,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 247 transitions, 2749 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:10,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:10,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:10,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:11,593 INFO L124 PetriNetUnfolderBase]: 2659/4192 cut-off events. [2024-06-04 15:07:11,593 INFO L125 PetriNetUnfolderBase]: For 283074/283076 co-relation queries the response was YES. [2024-06-04 15:07:11,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33731 conditions, 4192 events. 2659/4192 cut-off events. For 283074/283076 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23229 event pairs, 629 based on Foata normal form. 18/4209 useless extension candidates. Maximal degree in co-relation 33650. Up to 3827 conditions per place. [2024-06-04 15:07:11,632 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 34 changer transitions 0/284 dead transitions. [2024-06-04 15:07:11,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 284 transitions, 3513 flow [2024-06-04 15:07:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:07:11,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:07:11,634 INFO L175 Difference]: Start difference. First operand has 185 places, 247 transitions, 2749 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:07:11,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 284 transitions, 3513 flow [2024-06-04 15:07:11,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 284 transitions, 3302 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:11,943 INFO L231 Difference]: Finished difference. Result has 187 places, 248 transitions, 2673 flow [2024-06-04 15:07:11,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2673, PETRI_PLACES=187, PETRI_TRANSITIONS=248} [2024-06-04 15:07:11,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-04 15:07:11,944 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 248 transitions, 2673 flow [2024-06-04 15:07:11,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:11,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:11,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:11,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:07:11,945 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:11,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1185003087, now seen corresponding path program 5 times [2024-06-04 15:07:11,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:11,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593764089] [2024-06-04 15:07:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:11,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:13,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:13,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593764089] [2024-06-04 15:07:13,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593764089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:13,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:13,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660777308] [2024-06-04 15:07:13,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:13,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:13,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 248 transitions, 2673 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:13,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:13,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:14,440 INFO L124 PetriNetUnfolderBase]: 2689/4246 cut-off events. [2024-06-04 15:07:14,440 INFO L125 PetriNetUnfolderBase]: For 290638/290640 co-relation queries the response was YES. [2024-06-04 15:07:14,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33181 conditions, 4246 events. 2689/4246 cut-off events. For 290638/290640 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23598 event pairs, 671 based on Foata normal form. 30/4275 useless extension candidates. Maximal degree in co-relation 33099. Up to 3794 conditions per place. [2024-06-04 15:07:14,481 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 36 changer transitions 0/287 dead transitions. [2024-06-04 15:07:14,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 287 transitions, 3453 flow [2024-06-04 15:07:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:07:14,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:07:14,487 INFO L175 Difference]: Start difference. First operand has 187 places, 248 transitions, 2673 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:07:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 287 transitions, 3453 flow [2024-06-04 15:07:14,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 287 transitions, 3334 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:14,877 INFO L231 Difference]: Finished difference. Result has 189 places, 250 transitions, 2704 flow [2024-06-04 15:07:14,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2704, PETRI_PLACES=189, PETRI_TRANSITIONS=250} [2024-06-04 15:07:14,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-04 15:07:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 250 transitions, 2704 flow [2024-06-04 15:07:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:14,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:14,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:07:14,878 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:14,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 115397853, now seen corresponding path program 1 times [2024-06-04 15:07:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459698507] [2024-06-04 15:07:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:15,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459698507] [2024-06-04 15:07:15,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459698507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:15,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:15,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317666281] [2024-06-04 15:07:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:15,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:15,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:07:15,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 250 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:15,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:07:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:16,749 INFO L124 PetriNetUnfolderBase]: 2812/4369 cut-off events. [2024-06-04 15:07:16,749 INFO L125 PetriNetUnfolderBase]: For 273722/273722 co-relation queries the response was YES. [2024-06-04 15:07:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33875 conditions, 4369 events. 2812/4369 cut-off events. For 273722/273722 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23752 event pairs, 669 based on Foata normal form. 2/4370 useless extension candidates. Maximal degree in co-relation 33792. Up to 4156 conditions per place. [2024-06-04 15:07:16,803 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 224 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-04 15:07:16,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 274 transitions, 3502 flow [2024-06-04 15:07:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:07:16,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:07:16,805 INFO L175 Difference]: Start difference. First operand has 189 places, 250 transitions, 2704 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:07:16,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 274 transitions, 3502 flow [2024-06-04 15:07:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 274 transitions, 3406 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:17,081 INFO L231 Difference]: Finished difference. Result has 188 places, 256 transitions, 2792 flow [2024-06-04 15:07:17,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2792, PETRI_PLACES=188, PETRI_TRANSITIONS=256} [2024-06-04 15:07:17,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-04 15:07:17,082 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 256 transitions, 2792 flow [2024-06-04 15:07:17,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:17,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:17,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:07:17,083 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:17,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1214446987, now seen corresponding path program 6 times [2024-06-04 15:07:17,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:17,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912972406] [2024-06-04 15:07:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:18,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912972406] [2024-06-04 15:07:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912972406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:18,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:18,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:18,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465538565] [2024-06-04 15:07:18,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:18,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:18,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:18,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 256 transitions, 2792 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:18,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:18,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:18,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:19,546 INFO L124 PetriNetUnfolderBase]: 2922/4625 cut-off events. [2024-06-04 15:07:19,546 INFO L125 PetriNetUnfolderBase]: For 335333/335333 co-relation queries the response was YES. [2024-06-04 15:07:19,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38115 conditions, 4625 events. 2922/4625 cut-off events. For 335333/335333 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26334 event pairs, 685 based on Foata normal form. 12/4636 useless extension candidates. Maximal degree in co-relation 38031. Up to 3765 conditions per place. [2024-06-04 15:07:19,607 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 109 changer transitions 0/298 dead transitions. [2024-06-04 15:07:19,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 298 transitions, 3891 flow [2024-06-04 15:07:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-04 15:07:19,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-04 15:07:19,609 INFO L175 Difference]: Start difference. First operand has 188 places, 256 transitions, 2792 flow. Second operand 10 states and 197 transitions. [2024-06-04 15:07:19,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 298 transitions, 3891 flow [2024-06-04 15:07:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 298 transitions, 3834 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 15:07:20,123 INFO L231 Difference]: Finished difference. Result has 196 places, 259 transitions, 3149 flow [2024-06-04 15:07:20,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=196, PETRI_TRANSITIONS=259} [2024-06-04 15:07:20,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-04 15:07:20,123 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 259 transitions, 3149 flow [2024-06-04 15:07:20,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:20,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:20,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:20,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:07:20,124 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:20,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1214439547, now seen corresponding path program 7 times [2024-06-04 15:07:20,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:20,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531561724] [2024-06-04 15:07:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531561724] [2024-06-04 15:07:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531561724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:21,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:21,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717579030] [2024-06-04 15:07:21,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:21,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:21,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:21,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 259 transitions, 3149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:21,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:21,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:22,765 INFO L124 PetriNetUnfolderBase]: 2896/4581 cut-off events. [2024-06-04 15:07:22,766 INFO L125 PetriNetUnfolderBase]: For 340302/340302 co-relation queries the response was YES. [2024-06-04 15:07:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37790 conditions, 4581 events. 2896/4581 cut-off events. For 340302/340302 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25991 event pairs, 686 based on Foata normal form. 16/4596 useless extension candidates. Maximal degree in co-relation 37703. Up to 3982 conditions per place. [2024-06-04 15:07:22,804 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-04 15:07:22,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 293 transitions, 3865 flow [2024-06-04 15:07:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 15:07:22,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-04 15:07:22,809 INFO L175 Difference]: Start difference. First operand has 196 places, 259 transitions, 3149 flow. Second operand 10 states and 193 transitions. [2024-06-04 15:07:22,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 293 transitions, 3865 flow [2024-06-04 15:07:23,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 293 transitions, 3699 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 15:07:23,275 INFO L231 Difference]: Finished difference. Result has 200 places, 259 transitions, 3202 flow [2024-06-04 15:07:23,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3202, PETRI_PLACES=200, PETRI_TRANSITIONS=259} [2024-06-04 15:07:23,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-04 15:07:23,276 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 259 transitions, 3202 flow [2024-06-04 15:07:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:23,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:23,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:07:23,277 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:23,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash -215656365, now seen corresponding path program 8 times [2024-06-04 15:07:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175385936] [2024-06-04 15:07:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175385936] [2024-06-04 15:07:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175385936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528632374] [2024-06-04 15:07:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:24,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 259 transitions, 3202 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:24,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:24,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:24,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:25,837 INFO L124 PetriNetUnfolderBase]: 2961/4690 cut-off events. [2024-06-04 15:07:25,837 INFO L125 PetriNetUnfolderBase]: For 357128/357132 co-relation queries the response was YES. [2024-06-04 15:07:25,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38990 conditions, 4690 events. 2961/4690 cut-off events. For 357128/357132 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26834 event pairs, 695 based on Foata normal form. 20/4709 useless extension candidates. Maximal degree in co-relation 38901. Up to 4238 conditions per place. [2024-06-04 15:07:25,902 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 53 changer transitions 0/294 dead transitions. [2024-06-04 15:07:25,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 294 transitions, 3980 flow [2024-06-04 15:07:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:07:25,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-04 15:07:25,904 INFO L175 Difference]: Start difference. First operand has 200 places, 259 transitions, 3202 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:07:25,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 294 transitions, 3980 flow [2024-06-04 15:07:26,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 294 transitions, 3739 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:26,504 INFO L231 Difference]: Finished difference. Result has 202 places, 260 transitions, 3136 flow [2024-06-04 15:07:26,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3136, PETRI_PLACES=202, PETRI_TRANSITIONS=260} [2024-06-04 15:07:26,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-04 15:07:26,505 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 260 transitions, 3136 flow [2024-06-04 15:07:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:07:26,506 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:26,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash -404691377, now seen corresponding path program 9 times [2024-06-04 15:07:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827304721] [2024-06-04 15:07:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:28,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:28,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827304721] [2024-06-04 15:07:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827304721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:28,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:28,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667270197] [2024-06-04 15:07:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:28,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:28,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 260 transitions, 3136 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:28,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:28,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:28,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:29,250 INFO L124 PetriNetUnfolderBase]: 2926/4639 cut-off events. [2024-06-04 15:07:29,250 INFO L125 PetriNetUnfolderBase]: For 346114/346118 co-relation queries the response was YES. [2024-06-04 15:07:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 4639 events. 2926/4639 cut-off events. For 346114/346118 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26630 event pairs, 717 based on Foata normal form. 20/4658 useless extension candidates. Maximal degree in co-relation 37618. Up to 4187 conditions per place. [2024-06-04 15:07:29,294 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 54 changer transitions 0/294 dead transitions. [2024-06-04 15:07:29,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 294 transitions, 3854 flow [2024-06-04 15:07:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:07:29,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:07:29,295 INFO L175 Difference]: Start difference. First operand has 202 places, 260 transitions, 3136 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:07:29,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 294 transitions, 3854 flow [2024-06-04 15:07:29,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 294 transitions, 3693 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:29,790 INFO L231 Difference]: Finished difference. Result has 204 places, 260 transitions, 3090 flow [2024-06-04 15:07:29,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3090, PETRI_PLACES=204, PETRI_TRANSITIONS=260} [2024-06-04 15:07:29,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-04 15:07:29,791 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 260 transitions, 3090 flow [2024-06-04 15:07:29,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:29,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:29,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:07:29,792 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:29,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -310761205, now seen corresponding path program 10 times [2024-06-04 15:07:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:29,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752957483] [2024-06-04 15:07:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752957483] [2024-06-04 15:07:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752957483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:31,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:31,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060668123] [2024-06-04 15:07:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:31,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:31,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:31,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 260 transitions, 3090 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:31,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:31,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:32,586 INFO L124 PetriNetUnfolderBase]: 2959/4698 cut-off events. [2024-06-04 15:07:32,586 INFO L125 PetriNetUnfolderBase]: For 349961/349965 co-relation queries the response was YES. [2024-06-04 15:07:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37798 conditions, 4698 events. 2959/4698 cut-off events. For 349961/349965 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27066 event pairs, 725 based on Foata normal form. 20/4717 useless extension candidates. Maximal degree in co-relation 37707. Up to 4246 conditions per place. [2024-06-04 15:07:32,635 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 55 changer transitions 0/295 dead transitions. [2024-06-04 15:07:32,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 3871 flow [2024-06-04 15:07:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:07:32,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:07:32,636 INFO L175 Difference]: Start difference. First operand has 204 places, 260 transitions, 3090 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:07:32,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 3871 flow [2024-06-04 15:07:33,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 295 transitions, 3750 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 15:07:33,166 INFO L231 Difference]: Finished difference. Result has 205 places, 261 transitions, 3149 flow [2024-06-04 15:07:33,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=205, PETRI_TRANSITIONS=261} [2024-06-04 15:07:33,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-04 15:07:33,166 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 261 transitions, 3149 flow [2024-06-04 15:07:33,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:33,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:33,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:07:33,167 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:33,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -54058885, now seen corresponding path program 11 times [2024-06-04 15:07:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:33,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190152013] [2024-06-04 15:07:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:34,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190152013] [2024-06-04 15:07:34,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190152013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:34,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:34,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:34,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165759861] [2024-06-04 15:07:34,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:34,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:34,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:34,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:34,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 261 transitions, 3149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:34,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:34,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:34,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:35,926 INFO L124 PetriNetUnfolderBase]: 3028/4813 cut-off events. [2024-06-04 15:07:35,927 INFO L125 PetriNetUnfolderBase]: For 368168/368168 co-relation queries the response was YES. [2024-06-04 15:07:35,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 4813 events. 3028/4813 cut-off events. For 368168/368168 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27851 event pairs, 698 based on Foata normal form. 16/4828 useless extension candidates. Maximal degree in co-relation 38842. Up to 4091 conditions per place. [2024-06-04 15:07:35,973 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 153 selfloop transitions, 138 changer transitions 0/299 dead transitions. [2024-06-04 15:07:35,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 3952 flow [2024-06-04 15:07:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:07:35,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:07:35,975 INFO L175 Difference]: Start difference. First operand has 205 places, 261 transitions, 3149 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:07:35,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 3952 flow [2024-06-04 15:07:36,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 299 transitions, 3811 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:36,504 INFO L231 Difference]: Finished difference. Result has 207 places, 265 transitions, 3368 flow [2024-06-04 15:07:36,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3368, PETRI_PLACES=207, PETRI_TRANSITIONS=265} [2024-06-04 15:07:36,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-04 15:07:36,504 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 265 transitions, 3368 flow [2024-06-04 15:07:36,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:36,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:36,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:36,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:07:36,505 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:36,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash -310559395, now seen corresponding path program 12 times [2024-06-04 15:07:36,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547815609] [2024-06-04 15:07:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:36,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547815609] [2024-06-04 15:07:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547815609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508579432] [2024-06-04 15:07:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:37,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:37,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 265 transitions, 3368 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:37,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:38,812 INFO L124 PetriNetUnfolderBase]: 3086/4921 cut-off events. [2024-06-04 15:07:38,813 INFO L125 PetriNetUnfolderBase]: For 383395/383395 co-relation queries the response was YES. [2024-06-04 15:07:38,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 4921 events. 3086/4921 cut-off events. For 383395/383395 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28760 event pairs, 670 based on Foata normal form. 16/4936 useless extension candidates. Maximal degree in co-relation 40049. Up to 4316 conditions per place. [2024-06-04 15:07:38,868 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 186 selfloop transitions, 106 changer transitions 0/300 dead transitions. [2024-06-04 15:07:38,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 300 transitions, 4160 flow [2024-06-04 15:07:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:07:38,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:07:38,870 INFO L175 Difference]: Start difference. First operand has 207 places, 265 transitions, 3368 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:07:38,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 300 transitions, 4160 flow [2024-06-04 15:07:39,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 300 transitions, 3906 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 15:07:39,593 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3397 flow [2024-06-04 15:07:39,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3397, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-04 15:07:39,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-04 15:07:39,593 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3397 flow [2024-06-04 15:07:39,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:39,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:39,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:07:39,594 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:39,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -54051445, now seen corresponding path program 13 times [2024-06-04 15:07:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:39,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835110226] [2024-06-04 15:07:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:41,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:41,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835110226] [2024-06-04 15:07:41,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835110226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:41,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:41,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:41,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951993481] [2024-06-04 15:07:41,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:41,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:41,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:41,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:41,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3397 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:41,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:41,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:41,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:42,301 INFO L124 PetriNetUnfolderBase]: 3205/5136 cut-off events. [2024-06-04 15:07:42,301 INFO L125 PetriNetUnfolderBase]: For 411014/411018 co-relation queries the response was YES. [2024-06-04 15:07:42,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42295 conditions, 5136 events. 3205/5136 cut-off events. For 411014/411018 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30484 event pairs, 779 based on Foata normal form. 16/5151 useless extension candidates. Maximal degree in co-relation 42201. Up to 4130 conditions per place. [2024-06-04 15:07:42,441 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 98 changer transitions 0/313 dead transitions. [2024-06-04 15:07:42,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 313 transitions, 4531 flow [2024-06-04 15:07:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:07:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:07:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-04 15:07:42,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 15:07:42,442 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3397 flow. Second operand 11 states and 215 transitions. [2024-06-04 15:07:42,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 313 transitions, 4531 flow [2024-06-04 15:07:43,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 313 transitions, 4229 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 15:07:43,042 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3456 flow [2024-06-04 15:07:43,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-06-04 15:07:43,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-04 15:07:43,042 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3456 flow [2024-06-04 15:07:43,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:43,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:43,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:43,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:07:43,043 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:43,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash -44854675, now seen corresponding path program 14 times [2024-06-04 15:07:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240643927] [2024-06-04 15:07:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:44,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:44,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240643927] [2024-06-04 15:07:44,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240643927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:44,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:44,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:07:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529910146] [2024-06-04 15:07:44,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:44,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:07:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:07:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:07:44,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:44,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3456 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:44,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:44,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:44,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:45,795 INFO L124 PetriNetUnfolderBase]: 3221/5168 cut-off events. [2024-06-04 15:07:45,795 INFO L125 PetriNetUnfolderBase]: For 417868/417872 co-relation queries the response was YES. [2024-06-04 15:07:45,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42397 conditions, 5168 events. 3221/5168 cut-off events. For 417868/417872 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30703 event pairs, 744 based on Foata normal form. 16/5183 useless extension candidates. Maximal degree in co-relation 42301. Up to 3439 conditions per place. [2024-06-04 15:07:45,850 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 107 changer transitions 0/308 dead transitions. [2024-06-04 15:07:45,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 308 transitions, 4296 flow [2024-06-04 15:07:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:07:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:07:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 15:07:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-04 15:07:45,857 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3456 flow. Second operand 10 states and 194 transitions. [2024-06-04 15:07:45,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 308 transitions, 4296 flow [2024-06-04 15:07:46,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 308 transitions, 4071 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 15:07:46,587 INFO L231 Difference]: Finished difference. Result has 216 places, 270 transitions, 3519 flow [2024-06-04 15:07:46,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3519, PETRI_PLACES=216, PETRI_TRANSITIONS=270} [2024-06-04 15:07:46,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-04 15:07:46,588 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 270 transitions, 3519 flow [2024-06-04 15:07:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:46,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:46,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:07:46,588 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:46,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1067566263, now seen corresponding path program 2 times [2024-06-04 15:07:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871470216] [2024-06-04 15:07:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:47,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871470216] [2024-06-04 15:07:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871470216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350593682] [2024-06-04 15:07:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:47,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:47,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:07:47,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 270 transitions, 3519 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:47,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:47,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:07:47,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:48,751 INFO L124 PetriNetUnfolderBase]: 3332/5281 cut-off events. [2024-06-04 15:07:48,751 INFO L125 PetriNetUnfolderBase]: For 415245/415245 co-relation queries the response was YES. [2024-06-04 15:07:48,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43224 conditions, 5281 events. 3332/5281 cut-off events. For 415245/415245 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30927 event pairs, 800 based on Foata normal form. 2/5282 useless extension candidates. Maximal degree in co-relation 43127. Up to 5035 conditions per place. [2024-06-04 15:07:48,819 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 48 changer transitions 0/286 dead transitions. [2024-06-04 15:07:48,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 286 transitions, 4309 flow [2024-06-04 15:07:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:07:48,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-04 15:07:48,821 INFO L175 Difference]: Start difference. First operand has 216 places, 270 transitions, 3519 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:07:48,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 286 transitions, 4309 flow [2024-06-04 15:07:49,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 286 transitions, 4090 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:07:49,605 INFO L231 Difference]: Finished difference. Result has 216 places, 273 transitions, 3448 flow [2024-06-04 15:07:49,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=216, PETRI_TRANSITIONS=273} [2024-06-04 15:07:49,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-04 15:07:49,606 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 273 transitions, 3448 flow [2024-06-04 15:07:49,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:49,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:49,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:49,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:07:49,607 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:49,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:49,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1067578353, now seen corresponding path program 3 times [2024-06-04 15:07:49,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:49,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781513524] [2024-06-04 15:07:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:49,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:50,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781513524] [2024-06-04 15:07:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781513524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:50,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:50,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891034672] [2024-06-04 15:07:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:50,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:07:50,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 273 transitions, 3448 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:50,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:50,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:07:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:51,795 INFO L124 PetriNetUnfolderBase]: 3326/5273 cut-off events. [2024-06-04 15:07:51,795 INFO L125 PetriNetUnfolderBase]: For 419013/419013 co-relation queries the response was YES. [2024-06-04 15:07:51,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42720 conditions, 5273 events. 3326/5273 cut-off events. For 419013/419013 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30888 event pairs, 799 based on Foata normal form. 2/5274 useless extension candidates. Maximal degree in co-relation 42622. Up to 5030 conditions per place. [2024-06-04 15:07:51,849 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 49 changer transitions 0/285 dead transitions. [2024-06-04 15:07:51,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 285 transitions, 4078 flow [2024-06-04 15:07:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:07:51,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-04 15:07:51,850 INFO L175 Difference]: Start difference. First operand has 216 places, 273 transitions, 3448 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:07:51,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 285 transitions, 4078 flow [2024-06-04 15:07:52,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 3893 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:07:52,696 INFO L231 Difference]: Finished difference. Result has 218 places, 273 transitions, 3367 flow [2024-06-04 15:07:52,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3367, PETRI_PLACES=218, PETRI_TRANSITIONS=273} [2024-06-04 15:07:52,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-04 15:07:52,697 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 273 transitions, 3367 flow [2024-06-04 15:07:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:52,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:52,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:07:52,698 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:52,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash -187029377, now seen corresponding path program 1 times [2024-06-04 15:07:52,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:52,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299776294] [2024-06-04 15:07:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:53,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299776294] [2024-06-04 15:07:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299776294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:53,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:53,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572703466] [2024-06-04 15:07:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:53,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:53,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:07:53,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 273 transitions, 3367 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:53,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:53,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:07:53,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:54,624 INFO L124 PetriNetUnfolderBase]: 3024/4950 cut-off events. [2024-06-04 15:07:54,624 INFO L125 PetriNetUnfolderBase]: For 379102/379102 co-relation queries the response was YES. [2024-06-04 15:07:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39314 conditions, 4950 events. 3024/4950 cut-off events. For 379102/379102 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30174 event pairs, 763 based on Foata normal form. 1/4950 useless extension candidates. Maximal degree in co-relation 39215. Up to 4645 conditions per place. [2024-06-04 15:07:54,676 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 266 selfloop transitions, 15 changer transitions 0/291 dead transitions. [2024-06-04 15:07:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 291 transitions, 4027 flow [2024-06-04 15:07:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 15:07:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:07:54,677 INFO L175 Difference]: Start difference. First operand has 218 places, 273 transitions, 3367 flow. Second operand 7 states and 133 transitions. [2024-06-04 15:07:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 291 transitions, 4027 flow [2024-06-04 15:07:55,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 291 transitions, 3921 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 15:07:55,266 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 3351 flow [2024-06-04 15:07:55,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3351, PETRI_PLACES=219, PETRI_TRANSITIONS=276} [2024-06-04 15:07:55,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-04 15:07:55,266 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 3351 flow [2024-06-04 15:07:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:55,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:55,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:07:55,267 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:55,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash -186909221, now seen corresponding path program 1 times [2024-06-04 15:07:55,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:55,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669424522] [2024-06-04 15:07:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:55,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669424522] [2024-06-04 15:07:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669424522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39726426] [2024-06-04 15:07:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:56,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:07:56,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 276 transitions, 3351 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:56,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:56,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:07:56,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:57,337 INFO L124 PetriNetUnfolderBase]: 3132/5060 cut-off events. [2024-06-04 15:07:57,337 INFO L125 PetriNetUnfolderBase]: For 388631/388631 co-relation queries the response was YES. [2024-06-04 15:07:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40302 conditions, 5060 events. 3132/5060 cut-off events. For 388631/388631 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30341 event pairs, 801 based on Foata normal form. 1/5060 useless extension candidates. Maximal degree in co-relation 40202. Up to 4839 conditions per place. [2024-06-04 15:07:57,405 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 266 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2024-06-04 15:07:57,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 295 transitions, 4159 flow [2024-06-04 15:07:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:07:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:07:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:07:57,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:07:57,407 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 3351 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:07:57,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 295 transitions, 4159 flow [2024-06-04 15:07:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 295 transitions, 4091 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:07:58,361 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3415 flow [2024-06-04 15:07:58,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3415, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-04 15:07:58,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-04 15:07:58,362 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3415 flow [2024-06-04 15:07:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:58,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:58,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:07:58,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:07:58,362 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:07:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -186909407, now seen corresponding path program 2 times [2024-06-04 15:07:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055932881] [2024-06-04 15:07:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:59,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055932881] [2024-06-04 15:07:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055932881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:59,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:07:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281324233] [2024-06-04 15:07:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:59,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:07:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:07:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:07:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:07:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3415 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:07:59,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:59,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:07:59,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:00,504 INFO L124 PetriNetUnfolderBase]: 3044/4974 cut-off events. [2024-06-04 15:08:00,505 INFO L125 PetriNetUnfolderBase]: For 401804/401804 co-relation queries the response was YES. [2024-06-04 15:08:00,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40316 conditions, 4974 events. 3044/4974 cut-off events. For 401804/401804 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30249 event pairs, 767 based on Foata normal form. 1/4974 useless extension candidates. Maximal degree in co-relation 40215. Up to 4651 conditions per place. [2024-06-04 15:08:00,573 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 27 changer transitions 0/301 dead transitions. [2024-06-04 15:08:00,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 4263 flow [2024-06-04 15:08:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:08:00,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-04 15:08:00,575 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3415 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:08:00,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 4263 flow [2024-06-04 15:08:01,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 301 transitions, 4212 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 15:08:01,466 INFO L231 Difference]: Finished difference. Result has 225 places, 288 transitions, 3542 flow [2024-06-04 15:08:01,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3542, PETRI_PLACES=225, PETRI_TRANSITIONS=288} [2024-06-04 15:08:01,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-04 15:08:01,467 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 288 transitions, 3542 flow [2024-06-04 15:08:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:01,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:01,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:01,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:08:01,467 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:01,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 121913247, now seen corresponding path program 2 times [2024-06-04 15:08:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467072748] [2024-06-04 15:08:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:02,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467072748] [2024-06-04 15:08:02,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467072748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:02,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:02,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:08:02,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006659167] [2024-06-04 15:08:02,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:02,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:08:02,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:02,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:08:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:08:02,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:02,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 288 transitions, 3542 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:02,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:02,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:02,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:03,365 INFO L124 PetriNetUnfolderBase]: 3142/5074 cut-off events. [2024-06-04 15:08:03,365 INFO L125 PetriNetUnfolderBase]: For 413865/413865 co-relation queries the response was YES. [2024-06-04 15:08:03,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41385 conditions, 5074 events. 3142/5074 cut-off events. For 413865/413865 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30375 event pairs, 799 based on Foata normal form. 1/5074 useless extension candidates. Maximal degree in co-relation 41282. Up to 4874 conditions per place. [2024-06-04 15:08:03,416 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 280 selfloop transitions, 15 changer transitions 0/300 dead transitions. [2024-06-04 15:08:03,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 4194 flow [2024-06-04 15:08:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:08:03,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-04 15:08:03,418 INFO L175 Difference]: Start difference. First operand has 225 places, 288 transitions, 3542 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:08:03,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 4194 flow [2024-06-04 15:08:04,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 300 transitions, 4125 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 15:08:04,212 INFO L231 Difference]: Finished difference. Result has 229 places, 291 transitions, 3551 flow [2024-06-04 15:08:04,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3551, PETRI_PLACES=229, PETRI_TRANSITIONS=291} [2024-06-04 15:08:04,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-04 15:08:04,213 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 291 transitions, 3551 flow [2024-06-04 15:08:04,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:04,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:04,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:04,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:08:04,218 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 784602157, now seen corresponding path program 3 times [2024-06-04 15:08:04,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:04,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070534949] [2024-06-04 15:08:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:04,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070534949] [2024-06-04 15:08:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070534949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:04,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:04,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:08:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066746561] [2024-06-04 15:08:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:04,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:08:04,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:08:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:08:05,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:05,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 291 transitions, 3551 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:05,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:05,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:05,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:06,065 INFO L124 PetriNetUnfolderBase]: 3139/5070 cut-off events. [2024-06-04 15:08:06,065 INFO L125 PetriNetUnfolderBase]: For 423088/423088 co-relation queries the response was YES. [2024-06-04 15:08:06,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41480 conditions, 5070 events. 3139/5070 cut-off events. For 423088/423088 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30334 event pairs, 799 based on Foata normal form. 1/5070 useless extension candidates. Maximal degree in co-relation 41375. Up to 4864 conditions per place. [2024-06-04 15:08:06,128 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 20 changer transitions 0/300 dead transitions. [2024-06-04 15:08:06,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 300 transitions, 4167 flow [2024-06-04 15:08:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:08:06,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-04 15:08:06,130 INFO L175 Difference]: Start difference. First operand has 229 places, 291 transitions, 3551 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:08:06,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 300 transitions, 4167 flow [2024-06-04 15:08:06,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 300 transitions, 4101 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:08:06,881 INFO L231 Difference]: Finished difference. Result has 231 places, 291 transitions, 3531 flow [2024-06-04 15:08:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=231, PETRI_TRANSITIONS=291} [2024-06-04 15:08:06,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-04 15:08:06,882 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 291 transitions, 3531 flow [2024-06-04 15:08:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:08:06,882 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:06,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -872814939, now seen corresponding path program 3 times [2024-06-04 15:08:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405175703] [2024-06-04 15:08:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:07,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405175703] [2024-06-04 15:08:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405175703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:07,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:08:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765213337] [2024-06-04 15:08:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:07,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:08:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:08:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:08:07,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:08:07,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 291 transitions, 3531 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:07,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:07,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:08:07,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:08,774 INFO L124 PetriNetUnfolderBase]: 3043/4973 cut-off events. [2024-06-04 15:08:08,774 INFO L125 PetriNetUnfolderBase]: For 433154/433154 co-relation queries the response was YES. [2024-06-04 15:08:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40988 conditions, 4973 events. 3043/4973 cut-off events. For 433154/433154 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30239 event pairs, 766 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 40882. Up to 4677 conditions per place. [2024-06-04 15:08:08,837 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 272 selfloop transitions, 15 changer transitions 0/300 dead transitions. [2024-06-04 15:08:08,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 300 transitions, 4131 flow [2024-06-04 15:08:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:08:08,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-04 15:08:08,838 INFO L175 Difference]: Start difference. First operand has 231 places, 291 transitions, 3531 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:08:08,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 300 transitions, 4131 flow [2024-06-04 15:08:09,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 300 transitions, 4029 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:08:09,695 INFO L231 Difference]: Finished difference. Result has 232 places, 291 transitions, 3465 flow [2024-06-04 15:08:09,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3465, PETRI_PLACES=232, PETRI_TRANSITIONS=291} [2024-06-04 15:08:09,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-04 15:08:09,696 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 291 transitions, 3465 flow [2024-06-04 15:08:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:09,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:09,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:09,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:08:09,696 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:09,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1050041970, now seen corresponding path program 1 times [2024-06-04 15:08:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:09,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248568010] [2024-06-04 15:08:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248568010] [2024-06-04 15:08:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248568010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:11,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832898378] [2024-06-04 15:08:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:11,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 291 transitions, 3465 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:12,697 INFO L124 PetriNetUnfolderBase]: 3379/5411 cut-off events. [2024-06-04 15:08:12,697 INFO L125 PetriNetUnfolderBase]: For 533791/533793 co-relation queries the response was YES. [2024-06-04 15:08:12,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45540 conditions, 5411 events. 3379/5411 cut-off events. For 533791/533793 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32372 event pairs, 649 based on Foata normal form. 14/5424 useless extension candidates. Maximal degree in co-relation 45433. Up to 4660 conditions per place. [2024-06-04 15:08:12,757 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 241 selfloop transitions, 91 changer transitions 0/344 dead transitions. [2024-06-04 15:08:12,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 344 transitions, 4441 flow [2024-06-04 15:08:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:08:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-04 15:08:12,759 INFO L175 Difference]: Start difference. First operand has 232 places, 291 transitions, 3465 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:08:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 344 transitions, 4441 flow [2024-06-04 15:08:13,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4393 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:08:13,608 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3811 flow [2024-06-04 15:08:13,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3811, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-04 15:08:13,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-04 15:08:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3811 flow [2024-06-04 15:08:13,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:13,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:13,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:13,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:08:13,609 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1419410980, now seen corresponding path program 2 times [2024-06-04 15:08:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:13,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246128493] [2024-06-04 15:08:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246128493] [2024-06-04 15:08:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246128493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:15,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237296541] [2024-06-04 15:08:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:15,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:15,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3811 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:15,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:15,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:15,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:16,545 INFO L124 PetriNetUnfolderBase]: 3420/5488 cut-off events. [2024-06-04 15:08:16,545 INFO L125 PetriNetUnfolderBase]: For 551610/551612 co-relation queries the response was YES. [2024-06-04 15:08:16,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47121 conditions, 5488 events. 3420/5488 cut-off events. For 551610/551612 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32999 event pairs, 767 based on Foata normal form. 14/5501 useless extension candidates. Maximal degree in co-relation 47012. Up to 4923 conditions per place. [2024-06-04 15:08:16,620 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 259 selfloop transitions, 79 changer transitions 0/350 dead transitions. [2024-06-04 15:08:16,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 350 transitions, 4759 flow [2024-06-04 15:08:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:08:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:08:16,622 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3811 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:08:16,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 350 transitions, 4759 flow [2024-06-04 15:08:17,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 350 transitions, 4554 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:08:17,514 INFO L231 Difference]: Finished difference. Result has 242 places, 312 transitions, 3941 flow [2024-06-04 15:08:17,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=242, PETRI_TRANSITIONS=312} [2024-06-04 15:08:17,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-04 15:08:17,515 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 312 transitions, 3941 flow [2024-06-04 15:08:17,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:17,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:17,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:17,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:08:17,515 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:17,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:17,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2037286360, now seen corresponding path program 3 times [2024-06-04 15:08:17,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:17,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835060741] [2024-06-04 15:08:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:17,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:18,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:18,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835060741] [2024-06-04 15:08:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835060741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:18,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973126964] [2024-06-04 15:08:18,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:19,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:19,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 312 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:19,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:19,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:19,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:20,567 INFO L124 PetriNetUnfolderBase]: 3460/5551 cut-off events. [2024-06-04 15:08:20,568 INFO L125 PetriNetUnfolderBase]: For 574965/574975 co-relation queries the response was YES. [2024-06-04 15:08:20,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47590 conditions, 5551 events. 3460/5551 cut-off events. For 574965/574975 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33383 event pairs, 685 based on Foata normal form. 14/5560 useless extension candidates. Maximal degree in co-relation 47479. Up to 5102 conditions per place. [2024-06-04 15:08:20,656 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 42 changer transitions 0/355 dead transitions. [2024-06-04 15:08:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 4859 flow [2024-06-04 15:08:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:08:20,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:08:20,658 INFO L175 Difference]: Start difference. First operand has 242 places, 312 transitions, 3941 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:08:20,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 4859 flow [2024-06-04 15:08:21,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 355 transitions, 4672 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 15:08:21,779 INFO L231 Difference]: Finished difference. Result has 246 places, 315 transitions, 3941 flow [2024-06-04 15:08:21,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=246, PETRI_TRANSITIONS=315} [2024-06-04 15:08:21,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-04 15:08:21,780 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 315 transitions, 3941 flow [2024-06-04 15:08:21,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:21,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:21,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:21,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:08:21,781 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:21,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash 25419362, now seen corresponding path program 4 times [2024-06-04 15:08:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555592201] [2024-06-04 15:08:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:23,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555592201] [2024-06-04 15:08:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555592201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:23,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788735881] [2024-06-04 15:08:23,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:23,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 315 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:24,931 INFO L124 PetriNetUnfolderBase]: 3502/5625 cut-off events. [2024-06-04 15:08:24,931 INFO L125 PetriNetUnfolderBase]: For 592139/592141 co-relation queries the response was YES. [2024-06-04 15:08:24,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48223 conditions, 5625 events. 3502/5625 cut-off events. For 592139/592141 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34079 event pairs, 837 based on Foata normal form. 14/5638 useless extension candidates. Maximal degree in co-relation 48110. Up to 5240 conditions per place. [2024-06-04 15:08:24,986 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 33 changer transitions 0/353 dead transitions. [2024-06-04 15:08:24,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 353 transitions, 4824 flow [2024-06-04 15:08:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 15:08:24,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-04 15:08:24,987 INFO L175 Difference]: Start difference. First operand has 246 places, 315 transitions, 3941 flow. Second operand 10 states and 188 transitions. [2024-06-04 15:08:24,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 353 transitions, 4824 flow [2024-06-04 15:08:25,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 353 transitions, 4676 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 15:08:25,887 INFO L231 Difference]: Finished difference. Result has 250 places, 317 transitions, 3941 flow [2024-06-04 15:08:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=250, PETRI_TRANSITIONS=317} [2024-06-04 15:08:25,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-04 15:08:25,888 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 317 transitions, 3941 flow [2024-06-04 15:08:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:25,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:25,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:08:25,889 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:25,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -145398388, now seen corresponding path program 5 times [2024-06-04 15:08:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:25,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145375369] [2024-06-04 15:08:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145375369] [2024-06-04 15:08:27,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145375369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:27,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:27,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513778105] [2024-06-04 15:08:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:27,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:27,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 317 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:27,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:27,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:27,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:29,097 INFO L124 PetriNetUnfolderBase]: 3543/5696 cut-off events. [2024-06-04 15:08:29,097 INFO L125 PetriNetUnfolderBase]: For 609159/609161 co-relation queries the response was YES. [2024-06-04 15:08:29,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48777 conditions, 5696 events. 3543/5696 cut-off events. For 609159/609161 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34624 event pairs, 837 based on Foata normal form. 14/5709 useless extension candidates. Maximal degree in co-relation 48662. Up to 5252 conditions per place. [2024-06-04 15:08:29,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 38 changer transitions 0/358 dead transitions. [2024-06-04 15:08:29,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 358 transitions, 4869 flow [2024-06-04 15:08:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:08:29,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:08:29,169 INFO L175 Difference]: Start difference. First operand has 250 places, 317 transitions, 3941 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:08:29,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 358 transitions, 4869 flow [2024-06-04 15:08:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 358 transitions, 4760 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:08:30,553 INFO L231 Difference]: Finished difference. Result has 254 places, 321 transitions, 4029 flow [2024-06-04 15:08:30,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4029, PETRI_PLACES=254, PETRI_TRANSITIONS=321} [2024-06-04 15:08:30,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-04 15:08:30,553 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 321 transitions, 4029 flow [2024-06-04 15:08:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:30,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:30,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:08:30,554 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:30,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -723353830, now seen corresponding path program 1 times [2024-06-04 15:08:30,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469193723] [2024-06-04 15:08:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469193723] [2024-06-04 15:08:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469193723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:31,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:08:31,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83887836] [2024-06-04 15:08:31,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:08:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:08:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:08:31,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 321 transitions, 4029 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:32,517 INFO L124 PetriNetUnfolderBase]: 3569/5734 cut-off events. [2024-06-04 15:08:32,518 INFO L125 PetriNetUnfolderBase]: For 610189/610191 co-relation queries the response was YES. [2024-06-04 15:08:32,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49386 conditions, 5734 events. 3569/5734 cut-off events. For 610189/610191 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34910 event pairs, 866 based on Foata normal form. 4/5737 useless extension candidates. Maximal degree in co-relation 49269. Up to 5429 conditions per place. [2024-06-04 15:08:32,588 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 309 selfloop transitions, 31 changer transitions 0/352 dead transitions. [2024-06-04 15:08:32,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 352 transitions, 5075 flow [2024-06-04 15:08:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:08:32,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-04 15:08:32,589 INFO L175 Difference]: Start difference. First operand has 254 places, 321 transitions, 4029 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:08:32,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 352 transitions, 5075 flow [2024-06-04 15:08:33,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 352 transitions, 4927 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 15:08:33,777 INFO L231 Difference]: Finished difference. Result has 255 places, 332 transitions, 4125 flow [2024-06-04 15:08:33,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=255, PETRI_TRANSITIONS=332} [2024-06-04 15:08:33,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-04 15:08:33,777 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 332 transitions, 4125 flow [2024-06-04 15:08:33,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:33,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:33,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:33,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:08:33,778 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:33,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:33,778 INFO L85 PathProgramCache]: Analyzing trace with hash 51293030, now seen corresponding path program 2 times [2024-06-04 15:08:33,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:33,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094654788] [2024-06-04 15:08:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:33,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094654788] [2024-06-04 15:08:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094654788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:34,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:08:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482429449] [2024-06-04 15:08:34,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:34,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:08:34,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:34,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:08:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:08:34,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:34,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 332 transitions, 4125 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:34,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:34,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:34,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:36,007 INFO L124 PetriNetUnfolderBase]: 3579/5750 cut-off events. [2024-06-04 15:08:36,007 INFO L125 PetriNetUnfolderBase]: For 622353/622355 co-relation queries the response was YES. [2024-06-04 15:08:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49879 conditions, 5750 events. 3579/5750 cut-off events. For 622353/622355 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35057 event pairs, 866 based on Foata normal form. 4/5753 useless extension candidates. Maximal degree in co-relation 49760. Up to 5482 conditions per place. [2024-06-04 15:08:36,085 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 27 changer transitions 0/351 dead transitions. [2024-06-04 15:08:36,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 4938 flow [2024-06-04 15:08:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:08:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:08:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 15:08:36,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-04 15:08:36,087 INFO L175 Difference]: Start difference. First operand has 255 places, 332 transitions, 4125 flow. Second operand 7 states and 130 transitions. [2024-06-04 15:08:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 4938 flow [2024-06-04 15:08:37,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 351 transitions, 4819 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-04 15:08:37,585 INFO L231 Difference]: Finished difference. Result has 260 places, 336 transitions, 4147 flow [2024-06-04 15:08:37,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4147, PETRI_PLACES=260, PETRI_TRANSITIONS=336} [2024-06-04 15:08:37,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-04 15:08:37,586 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 336 transitions, 4147 flow [2024-06-04 15:08:37,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:37,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:37,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:37,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:08:37,587 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:37,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash -717631974, now seen corresponding path program 1 times [2024-06-04 15:08:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:37,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518832793] [2024-06-04 15:08:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:38,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518832793] [2024-06-04 15:08:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518832793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:38,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:08:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953373767] [2024-06-04 15:08:38,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:38,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:08:38,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:08:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:08:38,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:08:38,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 336 transitions, 4147 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:38,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:38,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:08:38,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:40,084 INFO L124 PetriNetUnfolderBase]: 3675/5848 cut-off events. [2024-06-04 15:08:40,084 INFO L125 PetriNetUnfolderBase]: For 636307/636307 co-relation queries the response was YES. [2024-06-04 15:08:40,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 5848 events. 3675/5848 cut-off events. For 636307/636307 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35122 event pairs, 837 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 50528. Up to 5573 conditions per place. [2024-06-04 15:08:40,177 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 302 selfloop transitions, 58 changer transitions 0/364 dead transitions. [2024-06-04 15:08:40,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 364 transitions, 5201 flow [2024-06-04 15:08:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:08:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:08:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:08:40,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-04 15:08:40,178 INFO L175 Difference]: Start difference. First operand has 260 places, 336 transitions, 4147 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:08:40,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 364 transitions, 5201 flow [2024-06-04 15:08:41,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 364 transitions, 5131 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 15:08:41,572 INFO L231 Difference]: Finished difference. Result has 265 places, 345 transitions, 4318 flow [2024-06-04 15:08:41,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=265, PETRI_TRANSITIONS=345} [2024-06-04 15:08:41,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-04 15:08:41,572 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 345 transitions, 4318 flow [2024-06-04 15:08:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:41,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:41,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:08:41,573 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:41,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1184221606, now seen corresponding path program 6 times [2024-06-04 15:08:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954704835] [2024-06-04 15:08:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:43,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:43,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954704835] [2024-06-04 15:08:43,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954704835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:43,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:43,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034280546] [2024-06-04 15:08:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:43,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:43,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:43,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 345 transitions, 4318 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:43,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:43,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:43,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:44,902 INFO L124 PetriNetUnfolderBase]: 3645/5867 cut-off events. [2024-06-04 15:08:44,902 INFO L125 PetriNetUnfolderBase]: For 679339/679343 co-relation queries the response was YES. [2024-06-04 15:08:44,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51572 conditions, 5867 events. 3645/5867 cut-off events. For 679339/679343 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35941 event pairs, 869 based on Foata normal form. 16/5882 useless extension candidates. Maximal degree in co-relation 51449. Up to 5392 conditions per place. [2024-06-04 15:08:44,996 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 317 selfloop transitions, 53 changer transitions 0/382 dead transitions. [2024-06-04 15:08:44,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 382 transitions, 5264 flow [2024-06-04 15:08:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:08:44,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:08:44,998 INFO L175 Difference]: Start difference. First operand has 265 places, 345 transitions, 4318 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:08:44,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 382 transitions, 5264 flow [2024-06-04 15:08:46,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 382 transitions, 5205 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 15:08:46,390 INFO L231 Difference]: Finished difference. Result has 273 places, 348 transitions, 4460 flow [2024-06-04 15:08:46,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4460, PETRI_PLACES=273, PETRI_TRANSITIONS=348} [2024-06-04 15:08:46,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-04 15:08:46,391 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 348 transitions, 4460 flow [2024-06-04 15:08:46,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:46,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:46,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:46,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:08:46,392 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:46,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1184336926, now seen corresponding path program 7 times [2024-06-04 15:08:46,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:46,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686766044] [2024-06-04 15:08:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:48,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:48,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686766044] [2024-06-04 15:08:48,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686766044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:48,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:48,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:48,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367679838] [2024-06-04 15:08:48,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:48,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:48,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:48,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 348 transitions, 4460 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:49,953 INFO L124 PetriNetUnfolderBase]: 3625/5835 cut-off events. [2024-06-04 15:08:49,953 INFO L125 PetriNetUnfolderBase]: For 674787/674791 co-relation queries the response was YES. [2024-06-04 15:08:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50957 conditions, 5835 events. 3625/5835 cut-off events. For 674787/674791 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 35754 event pairs, 835 based on Foata normal form. 16/5850 useless extension candidates. Maximal degree in co-relation 50830. Up to 5283 conditions per place. [2024-06-04 15:08:50,032 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 59 changer transitions 0/386 dead transitions. [2024-06-04 15:08:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 386 transitions, 5368 flow [2024-06-04 15:08:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:08:50,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:08:50,034 INFO L175 Difference]: Start difference. First operand has 273 places, 348 transitions, 4460 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:08:50,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 386 transitions, 5368 flow [2024-06-04 15:08:51,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 386 transitions, 5217 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 15:08:51,589 INFO L231 Difference]: Finished difference. Result has 277 places, 351 transitions, 4478 flow [2024-06-04 15:08:51,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4478, PETRI_PLACES=277, PETRI_TRANSITIONS=351} [2024-06-04 15:08:51,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-04 15:08:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 351 transitions, 4478 flow [2024-06-04 15:08:51,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:51,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:51,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:51,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:08:51,590 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1013519176, now seen corresponding path program 8 times [2024-06-04 15:08:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877436261] [2024-06-04 15:08:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877436261] [2024-06-04 15:08:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877436261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:53,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:53,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55137835] [2024-06-04 15:08:53,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:53,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:53,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 351 transitions, 4478 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:53,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:53,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:53,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:54,650 INFO L124 PetriNetUnfolderBase]: 3605/5803 cut-off events. [2024-06-04 15:08:54,650 INFO L125 PetriNetUnfolderBase]: For 663015/663019 co-relation queries the response was YES. [2024-06-04 15:08:54,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50066 conditions, 5803 events. 3605/5803 cut-off events. For 663015/663019 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35490 event pairs, 841 based on Foata normal form. 16/5818 useless extension candidates. Maximal degree in co-relation 49937. Up to 5328 conditions per place. [2024-06-04 15:08:54,722 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 322 selfloop transitions, 52 changer transitions 0/386 dead transitions. [2024-06-04 15:08:54,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 386 transitions, 5361 flow [2024-06-04 15:08:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:08:54,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:08:54,724 INFO L175 Difference]: Start difference. First operand has 277 places, 351 transitions, 4478 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:08:54,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 386 transitions, 5361 flow [2024-06-04 15:08:56,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 4952 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-04 15:08:56,299 INFO L231 Difference]: Finished difference. Result has 278 places, 352 transitions, 4193 flow [2024-06-04 15:08:56,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4193, PETRI_PLACES=278, PETRI_TRANSITIONS=352} [2024-06-04 15:08:56,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-04 15:08:56,299 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 352 transitions, 4193 flow [2024-06-04 15:08:56,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:56,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:08:56,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:08:56,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:08:56,300 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:08:56,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:08:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2007991598, now seen corresponding path program 9 times [2024-06-04 15:08:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:08:56,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952302003] [2024-06-04 15:08:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:08:56,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:08:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:08:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:08:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:08:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952302003] [2024-06-04 15:08:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952302003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:08:57,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:08:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:08:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520046724] [2024-06-04 15:08:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:08:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:08:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:08:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:08:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:08:57,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:08:57,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 352 transitions, 4193 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:08:57,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:08:57,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:08:57,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:08:59,211 INFO L124 PetriNetUnfolderBase]: 3585/5771 cut-off events. [2024-06-04 15:08:59,212 INFO L125 PetriNetUnfolderBase]: For 646847/646851 co-relation queries the response was YES. [2024-06-04 15:08:59,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47879 conditions, 5771 events. 3585/5771 cut-off events. For 646847/646851 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35315 event pairs, 827 based on Foata normal form. 16/5786 useless extension candidates. Maximal degree in co-relation 47751. Up to 5296 conditions per place. [2024-06-04 15:08:59,279 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 319 selfloop transitions, 54 changer transitions 0/385 dead transitions. [2024-06-04 15:08:59,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 385 transitions, 4953 flow [2024-06-04 15:08:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:08:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:08:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 15:08:59,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-04 15:08:59,281 INFO L175 Difference]: Start difference. First operand has 278 places, 352 transitions, 4193 flow. Second operand 10 states and 187 transitions. [2024-06-04 15:08:59,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 385 transitions, 4953 flow [2024-06-04 15:09:00,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 385 transitions, 4744 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-04 15:09:00,245 INFO L231 Difference]: Finished difference. Result has 278 places, 351 transitions, 3984 flow [2024-06-04 15:09:00,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3984, PETRI_PLACES=278, PETRI_TRANSITIONS=351} [2024-06-04 15:09:00,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-04 15:09:00,250 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 351 transitions, 3984 flow [2024-06-04 15:09:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:00,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:00,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:09:00,251 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:00,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1510658404, now seen corresponding path program 3 times [2024-06-04 15:09:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891809817] [2024-06-04 15:09:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891809817] [2024-06-04 15:09:01,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891809817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:01,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:01,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:09:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074990539] [2024-06-04 15:09:01,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:01,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:09:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:09:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:09:01,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:01,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 351 transitions, 3984 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:01,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:01,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:02,444 INFO L124 PetriNetUnfolderBase]: 3603/5798 cut-off events. [2024-06-04 15:09:02,444 INFO L125 PetriNetUnfolderBase]: For 637079/637083 co-relation queries the response was YES. [2024-06-04 15:09:02,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47812 conditions, 5798 events. 3603/5798 cut-off events. For 637079/637083 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35526 event pairs, 846 based on Foata normal form. 6/5803 useless extension candidates. Maximal degree in co-relation 47685. Up to 5428 conditions per place. [2024-06-04 15:09:02,518 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 316 selfloop transitions, 49 changer transitions 0/377 dead transitions. [2024-06-04 15:09:02,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 377 transitions, 5240 flow [2024-06-04 15:09:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:09:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:09:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:09:02,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-04 15:09:02,519 INFO L175 Difference]: Start difference. First operand has 278 places, 351 transitions, 3984 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:09:02,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 377 transitions, 5240 flow [2024-06-04 15:09:03,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 5048 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-04 15:09:03,523 INFO L231 Difference]: Finished difference. Result has 274 places, 357 transitions, 4027 flow [2024-06-04 15:09:03,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4027, PETRI_PLACES=274, PETRI_TRANSITIONS=357} [2024-06-04 15:09:03,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-04 15:09:03,523 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 357 transitions, 4027 flow [2024-06-04 15:09:03,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:03,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:03,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:09:03,524 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:03,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1499230564, now seen corresponding path program 4 times [2024-06-04 15:09:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458245418] [2024-06-04 15:09:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:04,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:04,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458245418] [2024-06-04 15:09:04,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458245418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:04,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:04,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:09:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975465858] [2024-06-04 15:09:04,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:04,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:09:04,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:09:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:09:04,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:04,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 357 transitions, 4027 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:04,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:04,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:04,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:05,709 INFO L124 PetriNetUnfolderBase]: 3611/5809 cut-off events. [2024-06-04 15:09:05,709 INFO L125 PetriNetUnfolderBase]: For 654320/654334 co-relation queries the response was YES. [2024-06-04 15:09:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 5809 events. 3611/5809 cut-off events. For 654320/654334 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35572 event pairs, 846 based on Foata normal form. 6/5809 useless extension candidates. Maximal degree in co-relation 48121. Up to 5434 conditions per place. [2024-06-04 15:09:05,784 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 53 changer transitions 0/376 dead transitions. [2024-06-04 15:09:05,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 5063 flow [2024-06-04 15:09:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:09:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:09:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:09:05,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-04 15:09:05,786 INFO L175 Difference]: Start difference. First operand has 274 places, 357 transitions, 4027 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:09:05,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 5063 flow [2024-06-04 15:09:07,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 376 transitions, 4891 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-04 15:09:07,276 INFO L231 Difference]: Finished difference. Result has 278 places, 360 transitions, 4035 flow [2024-06-04 15:09:07,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4035, PETRI_PLACES=278, PETRI_TRANSITIONS=360} [2024-06-04 15:09:07,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-04 15:09:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 360 transitions, 4035 flow [2024-06-04 15:09:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:07,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:07,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:09:07,278 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:07,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -687668428, now seen corresponding path program 5 times [2024-06-04 15:09:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:07,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008260069] [2024-06-04 15:09:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:07,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:07,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008260069] [2024-06-04 15:09:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008260069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:07,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:07,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:09:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746924714] [2024-06-04 15:09:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:07,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:09:07,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:09:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:09:08,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:08,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 360 transitions, 4035 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:08,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:08,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:08,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:09,115 INFO L124 PetriNetUnfolderBase]: 3605/5800 cut-off events. [2024-06-04 15:09:09,115 INFO L125 PetriNetUnfolderBase]: For 662079/662093 co-relation queries the response was YES. [2024-06-04 15:09:09,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48080 conditions, 5800 events. 3605/5800 cut-off events. For 662079/662093 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35498 event pairs, 842 based on Foata normal form. 6/5800 useless extension candidates. Maximal degree in co-relation 47952. Up to 5507 conditions per place. [2024-06-04 15:09:09,188 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 34 changer transitions 0/372 dead transitions. [2024-06-04 15:09:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 4969 flow [2024-06-04 15:09:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:09:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:09:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:09:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:09:09,189 INFO L175 Difference]: Start difference. First operand has 278 places, 360 transitions, 4035 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:09:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 4969 flow [2024-06-04 15:09:10,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 372 transitions, 4861 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:09:10,250 INFO L231 Difference]: Finished difference. Result has 281 places, 360 transitions, 4001 flow [2024-06-04 15:09:10,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4001, PETRI_PLACES=281, PETRI_TRANSITIONS=360} [2024-06-04 15:09:10,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-04 15:09:10,254 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 360 transitions, 4001 flow [2024-06-04 15:09:10,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:10,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:10,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:10,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:09:10,254 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:10,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1909399678, now seen corresponding path program 6 times [2024-06-04 15:09:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:10,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040590610] [2024-06-04 15:09:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040590610] [2024-06-04 15:09:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040590610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:10,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:09:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586296335] [2024-06-04 15:09:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:10,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:09:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:09:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:09:10,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:10,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 360 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:10,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:10,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:10,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:12,173 INFO L124 PetriNetUnfolderBase]: 3603/5797 cut-off events. [2024-06-04 15:09:12,173 INFO L125 PetriNetUnfolderBase]: For 671208/671212 co-relation queries the response was YES. [2024-06-04 15:09:12,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48009 conditions, 5797 events. 3603/5797 cut-off events. For 671208/671212 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35429 event pairs, 841 based on Foata normal form. 6/5802 useless extension candidates. Maximal degree in co-relation 47880. Up to 5521 conditions per place. [2024-06-04 15:09:12,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 26 changer transitions 0/370 dead transitions. [2024-06-04 15:09:12,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 370 transitions, 4759 flow [2024-06-04 15:09:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:09:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:09:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:09:12,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-04 15:09:12,250 INFO L175 Difference]: Start difference. First operand has 281 places, 360 transitions, 4001 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:09:12,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 370 transitions, 4759 flow [2024-06-04 15:09:13,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 370 transitions, 4643 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:09:13,483 INFO L231 Difference]: Finished difference. Result has 283 places, 360 transitions, 3943 flow [2024-06-04 15:09:13,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3943, PETRI_PLACES=283, PETRI_TRANSITIONS=360} [2024-06-04 15:09:13,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-04 15:09:13,484 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 360 transitions, 3943 flow [2024-06-04 15:09:13,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:13,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:13,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:13,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:09:13,484 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -295926694, now seen corresponding path program 2 times [2024-06-04 15:09:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913146805] [2024-06-04 15:09:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913146805] [2024-06-04 15:09:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913146805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:14,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919475494] [2024-06-04 15:09:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:14,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:14,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:14,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:09:14,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 360 transitions, 3943 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:14,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:14,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:09:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:15,873 INFO L124 PetriNetUnfolderBase]: 3699/5896 cut-off events. [2024-06-04 15:09:15,874 INFO L125 PetriNetUnfolderBase]: For 685554/685554 co-relation queries the response was YES. [2024-06-04 15:09:15,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48758 conditions, 5896 events. 3699/5896 cut-off events. For 685554/685554 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35543 event pairs, 813 based on Foata normal form. 2/5897 useless extension candidates. Maximal degree in co-relation 48629. Up to 5608 conditions per place. [2024-06-04 15:09:15,945 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 309 selfloop transitions, 64 changer transitions 0/377 dead transitions. [2024-06-04 15:09:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 377 transitions, 4975 flow [2024-06-04 15:09:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:09:15,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-04 15:09:15,946 INFO L175 Difference]: Start difference. First operand has 283 places, 360 transitions, 3943 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:09:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 377 transitions, 4975 flow [2024-06-04 15:09:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 377 transitions, 4869 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:09:16,992 INFO L231 Difference]: Finished difference. Result has 283 places, 363 transitions, 4021 flow [2024-06-04 15:09:16,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4021, PETRI_PLACES=283, PETRI_TRANSITIONS=363} [2024-06-04 15:09:16,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-04 15:09:16,992 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 363 transitions, 4021 flow [2024-06-04 15:09:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:16,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:16,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:16,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:09:16,993 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1909782404, now seen corresponding path program 3 times [2024-06-04 15:09:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382729332] [2024-06-04 15:09:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:16,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382729332] [2024-06-04 15:09:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382729332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:17,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824980420] [2024-06-04 15:09:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:17,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:09:17,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 363 transitions, 4021 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:17,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:17,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:09:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:19,657 INFO L124 PetriNetUnfolderBase]: 3709/5908 cut-off events. [2024-06-04 15:09:19,657 INFO L125 PetriNetUnfolderBase]: For 702012/702012 co-relation queries the response was YES. [2024-06-04 15:09:19,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49152 conditions, 5908 events. 3709/5908 cut-off events. For 702012/702012 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35610 event pairs, 813 based on Foata normal form. 2/5909 useless extension candidates. Maximal degree in co-relation 49022. Up to 5618 conditions per place. [2024-06-04 15:09:19,735 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 65 changer transitions 0/380 dead transitions. [2024-06-04 15:09:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 380 transitions, 5067 flow [2024-06-04 15:09:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:09:19,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:09:19,737 INFO L175 Difference]: Start difference. First operand has 283 places, 363 transitions, 4021 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:09:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 380 transitions, 5067 flow [2024-06-04 15:09:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 380 transitions, 4887 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:09:20,815 INFO L231 Difference]: Finished difference. Result has 286 places, 366 transitions, 4033 flow [2024-06-04 15:09:20,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4033, PETRI_PLACES=286, PETRI_TRANSITIONS=366} [2024-06-04 15:09:20,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-04 15:09:20,816 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 366 transitions, 4033 flow [2024-06-04 15:09:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:20,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:20,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:09:20,817 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1293171560, now seen corresponding path program 4 times [2024-06-04 15:09:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563759245] [2024-06-04 15:09:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:21,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:21,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563759245] [2024-06-04 15:09:21,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563759245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:21,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594759887] [2024-06-04 15:09:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:21,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:21,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:09:21,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 366 transitions, 4033 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:21,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:21,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:09:21,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:23,392 INFO L124 PetriNetUnfolderBase]: 3703/5902 cut-off events. [2024-06-04 15:09:23,392 INFO L125 PetriNetUnfolderBase]: For 711029/711029 co-relation queries the response was YES. [2024-06-04 15:09:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49058 conditions, 5902 events. 3703/5902 cut-off events. For 711029/711029 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35536 event pairs, 815 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 48927. Up to 5613 conditions per place. [2024-06-04 15:09:23,462 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 63 changer transitions 0/380 dead transitions. [2024-06-04 15:09:23,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 380 transitions, 4877 flow [2024-06-04 15:09:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:09:23,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:09:23,464 INFO L175 Difference]: Start difference. First operand has 286 places, 366 transitions, 4033 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:09:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 380 transitions, 4877 flow [2024-06-04 15:09:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 380 transitions, 4693 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:09:24,464 INFO L231 Difference]: Finished difference. Result has 288 places, 366 transitions, 3981 flow [2024-06-04 15:09:24,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3981, PETRI_PLACES=288, PETRI_TRANSITIONS=366} [2024-06-04 15:09:24,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-04 15:09:24,464 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 366 transitions, 3981 flow [2024-06-04 15:09:24,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:24,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:24,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:09:24,465 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:24,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash -731803740, now seen corresponding path program 1 times [2024-06-04 15:09:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:24,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814256957] [2024-06-04 15:09:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:24,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:25,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814256957] [2024-06-04 15:09:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814256957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:25,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37986484] [2024-06-04 15:09:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:25,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:09:25,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 366 transitions, 3981 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:25,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:25,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:09:25,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:27,014 INFO L124 PetriNetUnfolderBase]: 3487/5681 cut-off events. [2024-06-04 15:09:27,014 INFO L125 PetriNetUnfolderBase]: For 630506/630506 co-relation queries the response was YES. [2024-06-04 15:09:27,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 5681 events. 3487/5681 cut-off events. For 630506/630506 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35445 event pairs, 824 based on Foata normal form. 1/5672 useless extension candidates. Maximal degree in co-relation 45123. Up to 5345 conditions per place. [2024-06-04 15:09:27,105 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 24 changer transitions 0/393 dead transitions. [2024-06-04 15:09:27,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 393 transitions, 5071 flow [2024-06-04 15:09:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:09:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:09:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:09:27,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:09:27,107 INFO L175 Difference]: Start difference. First operand has 288 places, 366 transitions, 3981 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:09:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 393 transitions, 5071 flow [2024-06-04 15:09:28,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 393 transitions, 4928 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 15:09:28,603 INFO L231 Difference]: Finished difference. Result has 291 places, 372 transitions, 4006 flow [2024-06-04 15:09:28,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=291, PETRI_TRANSITIONS=372} [2024-06-04 15:09:28,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-04 15:09:28,604 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 372 transitions, 4006 flow [2024-06-04 15:09:28,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:28,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:28,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:09:28,605 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:28,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1502941698, now seen corresponding path program 2 times [2024-06-04 15:09:28,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:28,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243894632] [2024-06-04 15:09:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243894632] [2024-06-04 15:09:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243894632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593677328] [2024-06-04 15:09:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:29,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:29,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:09:29,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 372 transitions, 4006 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:29,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:09:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:31,420 INFO L124 PetriNetUnfolderBase]: 3484/5677 cut-off events. [2024-06-04 15:09:31,420 INFO L125 PetriNetUnfolderBase]: For 643035/643035 co-relation queries the response was YES. [2024-06-04 15:09:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45658 conditions, 5677 events. 3484/5677 cut-off events. For 643035/643035 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35431 event pairs, 824 based on Foata normal form. 1/5668 useless extension candidates. Maximal degree in co-relation 45526. Up to 5354 conditions per place. [2024-06-04 15:09:31,523 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 18 changer transitions 0/388 dead transitions. [2024-06-04 15:09:31,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 388 transitions, 4798 flow [2024-06-04 15:09:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:09:31,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-04 15:09:31,524 INFO L175 Difference]: Start difference. First operand has 291 places, 372 transitions, 4006 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:09:31,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 388 transitions, 4798 flow [2024-06-04 15:09:33,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 388 transitions, 4691 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-04 15:09:33,464 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 3941 flow [2024-06-04 15:09:33,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3941, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-04 15:09:33,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-04 15:09:33,465 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 3941 flow [2024-06-04 15:09:33,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:33,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:33,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:09:33,466 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1502941543, now seen corresponding path program 1 times [2024-06-04 15:09:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318832927] [2024-06-04 15:09:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:34,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:34,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318832927] [2024-06-04 15:09:34,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318832927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:34,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:34,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306280671] [2024-06-04 15:09:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:34,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:34,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 3941 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:34,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:34,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:34,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:35,791 INFO L124 PetriNetUnfolderBase]: 3583/5780 cut-off events. [2024-06-04 15:09:35,792 INFO L125 PetriNetUnfolderBase]: For 656200/656200 co-relation queries the response was YES. [2024-06-04 15:09:35,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46463 conditions, 5780 events. 3583/5780 cut-off events. For 656200/656200 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35542 event pairs, 851 based on Foata normal form. 1/5773 useless extension candidates. Maximal degree in co-relation 46329. Up to 5551 conditions per place. [2024-06-04 15:09:35,877 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 363 selfloop transitions, 18 changer transitions 0/391 dead transitions. [2024-06-04 15:09:35,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 391 transitions, 4815 flow [2024-06-04 15:09:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:09:35,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 15:09:35,878 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 3941 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:09:35,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 391 transitions, 4815 flow [2024-06-04 15:09:37,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 391 transitions, 4767 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:09:37,141 INFO L231 Difference]: Finished difference. Result has 295 places, 375 transitions, 4001 flow [2024-06-04 15:09:37,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=295, PETRI_TRANSITIONS=375} [2024-06-04 15:09:37,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-04 15:09:37,142 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 375 transitions, 4001 flow [2024-06-04 15:09:37,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:37,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:37,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:37,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:09:37,143 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:37,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash -727988725, now seen corresponding path program 2 times [2024-06-04 15:09:37,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:37,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809620117] [2024-06-04 15:09:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:37,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:37,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809620117] [2024-06-04 15:09:37,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809620117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:37,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:37,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:37,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669654172] [2024-06-04 15:09:37,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:38,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:38,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 375 transitions, 4001 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:38,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:38,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:39,211 INFO L124 PetriNetUnfolderBase]: 3596/5798 cut-off events. [2024-06-04 15:09:39,211 INFO L125 PetriNetUnfolderBase]: For 674112/674112 co-relation queries the response was YES. [2024-06-04 15:09:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47152 conditions, 5798 events. 3596/5798 cut-off events. For 674112/674112 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35661 event pairs, 853 based on Foata normal form. 1/5791 useless extension candidates. Maximal degree in co-relation 47017. Up to 5527 conditions per place. [2024-06-04 15:09:39,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 45 changer transitions 0/399 dead transitions. [2024-06-04 15:09:39,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 399 transitions, 5361 flow [2024-06-04 15:09:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:09:39,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-04 15:09:39,286 INFO L175 Difference]: Start difference. First operand has 295 places, 375 transitions, 4001 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:09:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 399 transitions, 5361 flow [2024-06-04 15:09:40,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 399 transitions, 5275 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:09:40,187 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 4215 flow [2024-06-04 15:09:40,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-04 15:09:40,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-04 15:09:40,188 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 4215 flow [2024-06-04 15:09:40,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:40,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:40,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:40,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:09:40,189 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:40,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1499216676, now seen corresponding path program 1 times [2024-06-04 15:09:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63283522] [2024-06-04 15:09:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63283522] [2024-06-04 15:09:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63283522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:41,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140865682] [2024-06-04 15:09:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:41,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:41,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 4215 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:41,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:41,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:41,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:42,399 INFO L124 PetriNetUnfolderBase]: 3614/5825 cut-off events. [2024-06-04 15:09:42,400 INFO L125 PetriNetUnfolderBase]: For 698681/698681 co-relation queries the response was YES. [2024-06-04 15:09:42,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47886 conditions, 5825 events. 3614/5825 cut-off events. For 698681/698681 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35867 event pairs, 853 based on Foata normal form. 2/5819 useless extension candidates. Maximal degree in co-relation 47750. Up to 5564 conditions per place. [2024-06-04 15:09:42,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 35 changer transitions 0/409 dead transitions. [2024-06-04 15:09:42,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 409 transitions, 5353 flow [2024-06-04 15:09:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:09:42,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-04 15:09:42,481 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 4215 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:09:42,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 409 transitions, 5353 flow [2024-06-04 15:09:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 409 transitions, 5260 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 15:09:43,597 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 4345 flow [2024-06-04 15:09:43,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4345, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-04 15:09:43,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-04 15:09:43,597 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 4345 flow [2024-06-04 15:09:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:43,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:43,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:43,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:09:43,598 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:43,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1499222628, now seen corresponding path program 3 times [2024-06-04 15:09:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:43,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054487489] [2024-06-04 15:09:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:44,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054487489] [2024-06-04 15:09:44,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054487489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:44,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:44,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:44,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019563057] [2024-06-04 15:09:44,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:44,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:44,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:44,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:09:44,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 4345 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:44,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:44,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:09:44,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:45,921 INFO L124 PetriNetUnfolderBase]: 3534/5745 cut-off events. [2024-06-04 15:09:45,921 INFO L125 PetriNetUnfolderBase]: For 713377/713377 co-relation queries the response was YES. [2024-06-04 15:09:45,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48070 conditions, 5745 events. 3534/5745 cut-off events. For 713377/713377 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35828 event pairs, 823 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 47931. Up to 5398 conditions per place. [2024-06-04 15:09:45,994 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 357 selfloop transitions, 30 changer transitions 0/409 dead transitions. [2024-06-04 15:09:45,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 409 transitions, 5225 flow [2024-06-04 15:09:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:09:45,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-04 15:09:45,996 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 4345 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:09:45,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 409 transitions, 5225 flow [2024-06-04 15:09:47,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 409 transitions, 5151 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 15:09:47,018 INFO L231 Difference]: Finished difference. Result has 308 places, 396 transitions, 4409 flow [2024-06-04 15:09:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=308, PETRI_TRANSITIONS=396} [2024-06-04 15:09:47,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-04 15:09:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 396 transitions, 4409 flow [2024-06-04 15:09:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:47,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:47,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:09:47,019 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:47,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1499222473, now seen corresponding path program 3 times [2024-06-04 15:09:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152290095] [2024-06-04 15:09:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152290095] [2024-06-04 15:09:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152290095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:47,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057278007] [2024-06-04 15:09:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:48,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:48,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 396 transitions, 4409 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:48,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:48,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:49,184 INFO L124 PetriNetUnfolderBase]: 3616/5828 cut-off events. [2024-06-04 15:09:49,184 INFO L125 PetriNetUnfolderBase]: For 723116/723116 co-relation queries the response was YES. [2024-06-04 15:09:49,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48985 conditions, 5828 events. 3616/5828 cut-off events. For 723116/723116 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35875 event pairs, 852 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 48843. Up to 5556 conditions per place. [2024-06-04 15:09:49,270 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 44 changer transitions 0/410 dead transitions. [2024-06-04 15:09:49,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 410 transitions, 5427 flow [2024-06-04 15:09:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:09:49,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-04 15:09:49,272 INFO L175 Difference]: Start difference. First operand has 308 places, 396 transitions, 4409 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:09:49,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 410 transitions, 5427 flow [2024-06-04 15:09:50,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 410 transitions, 5271 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-04 15:09:50,649 INFO L231 Difference]: Finished difference. Result has 310 places, 396 transitions, 4347 flow [2024-06-04 15:09:50,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4347, PETRI_PLACES=310, PETRI_TRANSITIONS=396} [2024-06-04 15:09:50,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-04 15:09:50,650 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 396 transitions, 4347 flow [2024-06-04 15:09:50,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:50,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:50,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:09:50,651 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:50,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1291620162, now seen corresponding path program 4 times [2024-06-04 15:09:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514354804] [2024-06-04 15:09:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514354804] [2024-06-04 15:09:51,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514354804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:51,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:51,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:51,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961291447] [2024-06-04 15:09:51,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:51,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:51,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:51,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:09:51,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 396 transitions, 4347 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:51,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:51,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:09:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:53,048 INFO L124 PetriNetUnfolderBase]: 3528/5737 cut-off events. [2024-06-04 15:09:53,048 INFO L125 PetriNetUnfolderBase]: For 735647/735647 co-relation queries the response was YES. [2024-06-04 15:09:53,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48476 conditions, 5737 events. 3528/5737 cut-off events. For 735647/735647 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35742 event pairs, 822 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 48333. Up to 5418 conditions per place. [2024-06-04 15:09:53,127 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 369 selfloop transitions, 18 changer transitions 0/409 dead transitions. [2024-06-04 15:09:53,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 409 transitions, 5221 flow [2024-06-04 15:09:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:09:53,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-04 15:09:53,128 INFO L175 Difference]: Start difference. First operand has 310 places, 396 transitions, 4347 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:09:53,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 409 transitions, 5221 flow [2024-06-04 15:09:54,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 409 transitions, 5115 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:09:54,576 INFO L231 Difference]: Finished difference. Result has 311 places, 399 transitions, 4361 flow [2024-06-04 15:09:54,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4361, PETRI_PLACES=311, PETRI_TRANSITIONS=399} [2024-06-04 15:09:54,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-04 15:09:54,577 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 399 transitions, 4361 flow [2024-06-04 15:09:54,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:54,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:54,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:54,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:09:54,577 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:54,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:54,578 INFO L85 PathProgramCache]: Analyzing trace with hash -295755419, now seen corresponding path program 4 times [2024-06-04 15:09:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:54,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053944879] [2024-06-04 15:09:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:55,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053944879] [2024-06-04 15:09:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053944879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:55,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:55,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590068827] [2024-06-04 15:09:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:55,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:55,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:55,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 399 transitions, 4361 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:55,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:55,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:55,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:09:56,479 INFO L124 PetriNetUnfolderBase]: 3618/5831 cut-off events. [2024-06-04 15:09:56,480 INFO L125 PetriNetUnfolderBase]: For 750488/750488 co-relation queries the response was YES. [2024-06-04 15:09:56,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49577 conditions, 5831 events. 3618/5831 cut-off events. For 750488/750488 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35902 event pairs, 850 based on Foata normal form. 1/5824 useless extension candidates. Maximal degree in co-relation 49433. Up to 5612 conditions per place. [2024-06-04 15:09:56,561 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 384 selfloop transitions, 18 changer transitions 0/412 dead transitions. [2024-06-04 15:09:56,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 412 transitions, 5263 flow [2024-06-04 15:09:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:09:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:09:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:09:56,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-04 15:09:56,563 INFO L175 Difference]: Start difference. First operand has 311 places, 399 transitions, 4361 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:09:56,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 412 transitions, 5263 flow [2024-06-04 15:09:58,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 412 transitions, 5165 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:09:58,082 INFO L231 Difference]: Finished difference. Result has 313 places, 402 transitions, 4381 flow [2024-06-04 15:09:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4381, PETRI_PLACES=313, PETRI_TRANSITIONS=402} [2024-06-04 15:09:58,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-04 15:09:58,083 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 402 transitions, 4381 flow [2024-06-04 15:09:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:58,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:09:58,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:09:58,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:09:58,083 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:09:58,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:09:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1287457485, now seen corresponding path program 5 times [2024-06-04 15:09:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:09:58,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228538788] [2024-06-04 15:09:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:09:58,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:09:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:09:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:09:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:09:58,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228538788] [2024-06-04 15:09:58,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228538788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:09:58,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:09:58,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:09:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395118052] [2024-06-04 15:09:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:09:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:09:58,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:09:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:09:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:09:58,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:09:58,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 402 transitions, 4381 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:09:58,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:09:58,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:09:58,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:00,099 INFO L124 PetriNetUnfolderBase]: 3623/5838 cut-off events. [2024-06-04 15:10:00,099 INFO L125 PetriNetUnfolderBase]: For 765783/765783 co-relation queries the response was YES. [2024-06-04 15:10:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49781 conditions, 5838 events. 3623/5838 cut-off events. For 765783/765783 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35922 event pairs, 850 based on Foata normal form. 1/5831 useless extension candidates. Maximal degree in co-relation 49636. Up to 5603 conditions per place. [2024-06-04 15:10:00,188 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 31 changer transitions 0/416 dead transitions. [2024-06-04 15:10:00,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 5481 flow [2024-06-04 15:10:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:10:00,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:10:00,189 INFO L175 Difference]: Start difference. First operand has 313 places, 402 transitions, 4381 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:10:00,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 5481 flow [2024-06-04 15:10:01,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 416 transitions, 5391 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:10:01,492 INFO L231 Difference]: Finished difference. Result has 315 places, 405 transitions, 4435 flow [2024-06-04 15:10:01,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4435, PETRI_PLACES=315, PETRI_TRANSITIONS=405} [2024-06-04 15:10:01,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-04 15:10:01,493 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 405 transitions, 4435 flow [2024-06-04 15:10:01,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:01,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:01,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:01,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:10:01,493 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:01,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1287451905, now seen corresponding path program 6 times [2024-06-04 15:10:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:01,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147617491] [2024-06-04 15:10:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147617491] [2024-06-04 15:10:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147617491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:02,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:02,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651134530] [2024-06-04 15:10:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:02,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:02,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 405 transitions, 4435 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:02,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:02,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:02,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:03,881 INFO L124 PetriNetUnfolderBase]: 3620/5834 cut-off events. [2024-06-04 15:10:03,881 INFO L125 PetriNetUnfolderBase]: For 776538/776538 co-relation queries the response was YES. [2024-06-04 15:10:03,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49791 conditions, 5834 events. 3620/5834 cut-off events. For 776538/776538 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35911 event pairs, 850 based on Foata normal form. 1/5827 useless extension candidates. Maximal degree in co-relation 49645. Up to 5600 conditions per place. [2024-06-04 15:10:03,983 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-04 15:10:03,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 415 transitions, 5273 flow [2024-06-04 15:10:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:10:03,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:10:03,984 INFO L175 Difference]: Start difference. First operand has 315 places, 405 transitions, 4435 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:10:03,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 415 transitions, 5273 flow [2024-06-04 15:10:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 415 transitions, 5085 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-04 15:10:05,842 INFO L231 Difference]: Finished difference. Result has 317 places, 405 transitions, 4313 flow [2024-06-04 15:10:05,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4313, PETRI_PLACES=317, PETRI_TRANSITIONS=405} [2024-06-04 15:10:05,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-04 15:10:05,843 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 405 transitions, 4313 flow [2024-06-04 15:10:05,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:05,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:05,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:05,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:10:05,844 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:05,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1280100038, now seen corresponding path program 2 times [2024-06-04 15:10:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:05,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103881639] [2024-06-04 15:10:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:05,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:06,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:06,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103881639] [2024-06-04 15:10:06,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103881639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:06,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:06,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006400238] [2024-06-04 15:10:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:06,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:06,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:06,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 405 transitions, 4313 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:06,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:06,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:06,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:08,447 INFO L124 PetriNetUnfolderBase]: 3660/5893 cut-off events. [2024-06-04 15:10:08,448 INFO L125 PetriNetUnfolderBase]: For 810166/810166 co-relation queries the response was YES. [2024-06-04 15:10:08,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50599 conditions, 5893 events. 3660/5893 cut-off events. For 810166/810166 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36263 event pairs, 851 based on Foata normal form. 2/5887 useless extension candidates. Maximal degree in co-relation 50452. Up to 5651 conditions per place. [2024-06-04 15:10:08,531 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 25 changer transitions 0/424 dead transitions. [2024-06-04 15:10:08,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 424 transitions, 5461 flow [2024-06-04 15:10:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:10:08,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-04 15:10:08,533 INFO L175 Difference]: Start difference. First operand has 317 places, 405 transitions, 4313 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:10:08,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 424 transitions, 5461 flow [2024-06-04 15:10:10,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 424 transitions, 5383 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:10:10,519 INFO L231 Difference]: Finished difference. Result has 318 places, 411 transitions, 4393 flow [2024-06-04 15:10:10,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4393, PETRI_PLACES=318, PETRI_TRANSITIONS=411} [2024-06-04 15:10:10,519 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-04 15:10:10,520 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 411 transitions, 4393 flow [2024-06-04 15:10:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:10,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:10,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:10:10,520 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:10,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1287451688, now seen corresponding path program 3 times [2024-06-04 15:10:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124332685] [2024-06-04 15:10:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124332685] [2024-06-04 15:10:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124332685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:11,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:11,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482371644] [2024-06-04 15:10:11,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:11,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:11,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 411 transitions, 4393 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:11,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:11,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:11,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:12,612 INFO L124 PetriNetUnfolderBase]: 3640/5866 cut-off events. [2024-06-04 15:10:12,612 INFO L125 PetriNetUnfolderBase]: For 811826/811826 co-relation queries the response was YES. [2024-06-04 15:10:12,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 5866 events. 3640/5866 cut-off events. For 811826/811826 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36172 event pairs, 850 based on Foata normal form. 2/5860 useless extension candidates. Maximal degree in co-relation 50101. Up to 5614 conditions per place. [2024-06-04 15:10:12,692 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 32 changer transitions 0/424 dead transitions. [2024-06-04 15:10:12,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 5447 flow [2024-06-04 15:10:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:10:12,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-04 15:10:12,694 INFO L175 Difference]: Start difference. First operand has 318 places, 411 transitions, 4393 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:10:12,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 5447 flow [2024-06-04 15:10:15,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 424 transitions, 5377 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:10:15,152 INFO L231 Difference]: Finished difference. Result has 322 places, 411 transitions, 4393 flow [2024-06-04 15:10:15,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4393, PETRI_PLACES=322, PETRI_TRANSITIONS=411} [2024-06-04 15:10:15,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-04 15:10:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 411 transitions, 4393 flow [2024-06-04 15:10:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:10:15,153 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1279833128, now seen corresponding path program 4 times [2024-06-04 15:10:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755919476] [2024-06-04 15:10:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:16,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755919476] [2024-06-04 15:10:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755919476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855412767] [2024-06-04 15:10:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:16,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:16,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:16,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 411 transitions, 4393 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:16,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:16,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:17,567 INFO L124 PetriNetUnfolderBase]: 3634/5858 cut-off events. [2024-06-04 15:10:17,568 INFO L125 PetriNetUnfolderBase]: For 817854/817854 co-relation queries the response was YES. [2024-06-04 15:10:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50162 conditions, 5858 events. 3634/5858 cut-off events. For 817854/817854 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36122 event pairs, 849 based on Foata normal form. 2/5852 useless extension candidates. Maximal degree in co-relation 50013. Up to 5630 conditions per place. [2024-06-04 15:10:17,665 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 20 changer transitions 0/422 dead transitions. [2024-06-04 15:10:17,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 422 transitions, 5249 flow [2024-06-04 15:10:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:10:17,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-04 15:10:17,667 INFO L175 Difference]: Start difference. First operand has 322 places, 411 transitions, 4393 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:10:17,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 422 transitions, 5249 flow [2024-06-04 15:10:19,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 422 transitions, 5086 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 15:10:19,999 INFO L231 Difference]: Finished difference. Result has 322 places, 411 transitions, 4277 flow [2024-06-04 15:10:20,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4277, PETRI_PLACES=322, PETRI_TRANSITIONS=411} [2024-06-04 15:10:20,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-04 15:10:20,000 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 411 transitions, 4277 flow [2024-06-04 15:10:20,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:20,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:20,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:10:20,001 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:20,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1873942628, now seen corresponding path program 1 times [2024-06-04 15:10:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:20,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149279173] [2024-06-04 15:10:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:21,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:21,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149279173] [2024-06-04 15:10:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149279173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:21,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:21,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261517787] [2024-06-04 15:10:21,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:21,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:21,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 411 transitions, 4277 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:21,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:21,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:21,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:22,788 INFO L124 PetriNetUnfolderBase]: 3702/5940 cut-off events. [2024-06-04 15:10:22,789 INFO L125 PetriNetUnfolderBase]: For 953814/953816 co-relation queries the response was YES. [2024-06-04 15:10:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53194 conditions, 5940 events. 3702/5940 cut-off events. For 953814/953816 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36385 event pairs, 806 based on Foata normal form. 3/5938 useless extension candidates. Maximal degree in co-relation 53045. Up to 5536 conditions per place. [2024-06-04 15:10:22,866 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 364 selfloop transitions, 59 changer transitions 0/441 dead transitions. [2024-06-04 15:10:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 441 transitions, 5529 flow [2024-06-04 15:10:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:10:22,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:10:22,868 INFO L175 Difference]: Start difference. First operand has 322 places, 411 transitions, 4277 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:10:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 441 transitions, 5529 flow [2024-06-04 15:10:24,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 441 transitions, 5477 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 15:10:24,794 INFO L231 Difference]: Finished difference. Result has 323 places, 417 transitions, 4496 flow [2024-06-04 15:10:24,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4496, PETRI_PLACES=323, PETRI_TRANSITIONS=417} [2024-06-04 15:10:24,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-04 15:10:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 417 transitions, 4496 flow [2024-06-04 15:10:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:24,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:24,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:10:24,795 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:24,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1879656548, now seen corresponding path program 2 times [2024-06-04 15:10:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554545091] [2024-06-04 15:10:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554545091] [2024-06-04 15:10:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554545091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356624] [2024-06-04 15:10:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:25,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:25,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 417 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:25,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:25,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:25,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:27,610 INFO L124 PetriNetUnfolderBase]: 3712/5950 cut-off events. [2024-06-04 15:10:27,611 INFO L125 PetriNetUnfolderBase]: For 977117/977119 co-relation queries the response was YES. [2024-06-04 15:10:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54047 conditions, 5950 events. 3712/5950 cut-off events. For 977117/977119 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36453 event pairs, 822 based on Foata normal form. 3/5944 useless extension candidates. Maximal degree in co-relation 53897. Up to 5607 conditions per place. [2024-06-04 15:10:27,723 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 52 changer transitions 0/443 dead transitions. [2024-06-04 15:10:27,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 443 transitions, 5518 flow [2024-06-04 15:10:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:10:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-04 15:10:27,724 INFO L175 Difference]: Start difference. First operand has 323 places, 417 transitions, 4496 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:10:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 443 transitions, 5518 flow [2024-06-04 15:10:31,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 443 transitions, 5343 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-04 15:10:31,355 INFO L231 Difference]: Finished difference. Result has 328 places, 423 transitions, 4545 flow [2024-06-04 15:10:31,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4545, PETRI_PLACES=328, PETRI_TRANSITIONS=423} [2024-06-04 15:10:31,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-04 15:10:31,356 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 423 transitions, 4545 flow [2024-06-04 15:10:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:31,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:31,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:10:31,357 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:31,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash -53225352, now seen corresponding path program 1 times [2024-06-04 15:10:31,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:31,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335144669] [2024-06-04 15:10:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:31,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:32,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:32,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335144669] [2024-06-04 15:10:32,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335144669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:32,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214901010] [2024-06-04 15:10:32,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:32,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:32,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:32,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 423 transitions, 4545 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:32,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:32,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:32,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:33,937 INFO L124 PetriNetUnfolderBase]: 3722/5962 cut-off events. [2024-06-04 15:10:33,937 INFO L125 PetriNetUnfolderBase]: For 1001126/1001128 co-relation queries the response was YES. [2024-06-04 15:10:34,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54388 conditions, 5962 events. 3722/5962 cut-off events. For 1001126/1001128 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36472 event pairs, 828 based on Foata normal form. 4/5957 useless extension candidates. Maximal degree in co-relation 54236. Up to 5633 conditions per place. [2024-06-04 15:10:34,040 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 32 changer transitions 0/448 dead transitions. [2024-06-04 15:10:34,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 448 transitions, 5571 flow [2024-06-04 15:10:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:10:34,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-04 15:10:34,041 INFO L175 Difference]: Start difference. First operand has 328 places, 423 transitions, 4545 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:10:34,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 448 transitions, 5571 flow [2024-06-04 15:10:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 448 transitions, 5459 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:10:37,130 INFO L231 Difference]: Finished difference. Result has 331 places, 426 transitions, 4591 flow [2024-06-04 15:10:37,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4591, PETRI_PLACES=331, PETRI_TRANSITIONS=426} [2024-06-04 15:10:37,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-04 15:10:37,131 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 426 transitions, 4591 flow [2024-06-04 15:10:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:37,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:37,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:10:37,132 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:37,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1989532700, now seen corresponding path program 1 times [2024-06-04 15:10:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:37,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986650033] [2024-06-04 15:10:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:38,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986650033] [2024-06-04 15:10:38,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986650033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:38,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:38,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988119338] [2024-06-04 15:10:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:38,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:10:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 426 transitions, 4591 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:10:38,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:39,613 INFO L124 PetriNetUnfolderBase]: 3832/6086 cut-off events. [2024-06-04 15:10:39,613 INFO L125 PetriNetUnfolderBase]: For 1030400/1030402 co-relation queries the response was YES. [2024-06-04 15:10:39,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56002 conditions, 6086 events. 3832/6086 cut-off events. For 1030400/1030402 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36883 event pairs, 856 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 55849. Up to 5823 conditions per place. [2024-06-04 15:10:39,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 46 changer transitions 0/461 dead transitions. [2024-06-04 15:10:39,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 461 transitions, 6004 flow [2024-06-04 15:10:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:10:39,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-04 15:10:39,706 INFO L175 Difference]: Start difference. First operand has 331 places, 426 transitions, 4591 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:10:39,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 461 transitions, 6004 flow [2024-06-04 15:10:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 461 transitions, 5872 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:10:42,860 INFO L231 Difference]: Finished difference. Result has 334 places, 439 transitions, 4792 flow [2024-06-04 15:10:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=334, PETRI_TRANSITIONS=439} [2024-06-04 15:10:42,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-04 15:10:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 439 transitions, 4792 flow [2024-06-04 15:10:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:42,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:42,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:42,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:10:42,861 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:42,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1989532514, now seen corresponding path program 2 times [2024-06-04 15:10:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985499434] [2024-06-04 15:10:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985499434] [2024-06-04 15:10:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985499434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:43,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615965684] [2024-06-04 15:10:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:43,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:43,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 439 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:43,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:43,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:43,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:45,281 INFO L124 PetriNetUnfolderBase]: 3778/6046 cut-off events. [2024-06-04 15:10:45,281 INFO L125 PetriNetUnfolderBase]: For 1068824/1068826 co-relation queries the response was YES. [2024-06-04 15:10:45,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56934 conditions, 6046 events. 3778/6046 cut-off events. For 1068824/1068826 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 37059 event pairs, 832 based on Foata normal form. 4/6049 useless extension candidates. Maximal degree in co-relation 56779. Up to 5645 conditions per place. [2024-06-04 15:10:45,371 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 48 changer transitions 0/467 dead transitions. [2024-06-04 15:10:45,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 467 transitions, 6170 flow [2024-06-04 15:10:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:10:45,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:10:45,373 INFO L175 Difference]: Start difference. First operand has 334 places, 439 transitions, 4792 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:10:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 467 transitions, 6170 flow [2024-06-04 15:10:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 467 transitions, 6044 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-04 15:10:47,948 INFO L231 Difference]: Finished difference. Result has 339 places, 445 transitions, 4956 flow [2024-06-04 15:10:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4956, PETRI_PLACES=339, PETRI_TRANSITIONS=445} [2024-06-04 15:10:47,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-04 15:10:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 445 transitions, 4956 flow [2024-06-04 15:10:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:47,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:47,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:10:47,950 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2128065926, now seen corresponding path program 2 times [2024-06-04 15:10:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277884564] [2024-06-04 15:10:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:48,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:48,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277884564] [2024-06-04 15:10:48,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277884564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:48,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:48,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185811148] [2024-06-04 15:10:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:10:48,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 445 transitions, 4956 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:48,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:48,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:10:48,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:50,488 INFO L124 PetriNetUnfolderBase]: 3868/6138 cut-off events. [2024-06-04 15:10:50,488 INFO L125 PetriNetUnfolderBase]: For 1090451/1090453 co-relation queries the response was YES. [2024-06-04 15:10:50,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57915 conditions, 6138 events. 3868/6138 cut-off events. For 1090451/1090453 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37193 event pairs, 861 based on Foata normal form. 4/6141 useless extension candidates. Maximal degree in co-relation 57758. Up to 5942 conditions per place. [2024-06-04 15:10:50,565 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 36 changer transitions 0/465 dead transitions. [2024-06-04 15:10:50,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 465 transitions, 5989 flow [2024-06-04 15:10:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:10:50,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:10:50,567 INFO L175 Difference]: Start difference. First operand has 339 places, 445 transitions, 4956 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:10:50,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 465 transitions, 5989 flow [2024-06-04 15:10:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 465 transitions, 5849 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 15:10:53,482 INFO L231 Difference]: Finished difference. Result has 343 places, 449 transitions, 4949 flow [2024-06-04 15:10:53,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4949, PETRI_PLACES=343, PETRI_TRANSITIONS=449} [2024-06-04 15:10:53,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-04 15:10:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 449 transitions, 4949 flow [2024-06-04 15:10:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:53,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:53,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:53,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:10:53,491 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:53,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2128303076, now seen corresponding path program 3 times [2024-06-04 15:10:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:53,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123959207] [2024-06-04 15:10:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:53,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123959207] [2024-06-04 15:10:54,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123959207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:54,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178099824] [2024-06-04 15:10:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:54,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:10:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 449 transitions, 4949 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:10:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:10:56,150 INFO L124 PetriNetUnfolderBase]: 3878/6156 cut-off events. [2024-06-04 15:10:56,151 INFO L125 PetriNetUnfolderBase]: For 1109040/1109042 co-relation queries the response was YES. [2024-06-04 15:10:56,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58128 conditions, 6156 events. 3878/6156 cut-off events. For 1109040/1109042 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 37319 event pairs, 857 based on Foata normal form. 4/6159 useless extension candidates. Maximal degree in co-relation 57969. Up to 5942 conditions per place. [2024-06-04 15:10:56,243 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 41 changer transitions 0/469 dead transitions. [2024-06-04 15:10:56,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 469 transitions, 6003 flow [2024-06-04 15:10:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:10:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:10:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:10:56,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-04 15:10:56,244 INFO L175 Difference]: Start difference. First operand has 343 places, 449 transitions, 4949 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:10:56,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 469 transitions, 6003 flow [2024-06-04 15:10:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 469 transitions, 5905 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:10:58,673 INFO L231 Difference]: Finished difference. Result has 346 places, 452 transitions, 4991 flow [2024-06-04 15:10:58,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=346, PETRI_TRANSITIONS=452} [2024-06-04 15:10:58,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-04 15:10:58,674 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 452 transitions, 4991 flow [2024-06-04 15:10:58,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:58,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:10:58,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:10:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:10:58,674 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:10:58,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:10:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2128303262, now seen corresponding path program 3 times [2024-06-04 15:10:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:10:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337265537] [2024-06-04 15:10:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:10:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:10:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:10:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:10:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:10:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337265537] [2024-06-04 15:10:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337265537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:10:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:10:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:10:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151308238] [2024-06-04 15:10:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:10:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:10:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:10:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:10:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:10:59,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:10:59,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 452 transitions, 4991 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:10:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:10:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:10:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:01,263 INFO L124 PetriNetUnfolderBase]: 3806/6086 cut-off events. [2024-06-04 15:11:01,264 INFO L125 PetriNetUnfolderBase]: For 1132888/1132890 co-relation queries the response was YES. [2024-06-04 15:11:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58006 conditions, 6086 events. 3806/6086 cut-off events. For 1132888/1132890 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37337 event pairs, 834 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 57846. Up to 5771 conditions per place. [2024-06-04 15:11:01,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 30 changer transitions 0/472 dead transitions. [2024-06-04 15:11:01,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 472 transitions, 6035 flow [2024-06-04 15:11:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:11:01,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:11:01,359 INFO L175 Difference]: Start difference. First operand has 346 places, 452 transitions, 4991 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:11:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 472 transitions, 6035 flow [2024-06-04 15:11:03,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 472 transitions, 5923 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:03,025 INFO L231 Difference]: Finished difference. Result has 348 places, 455 transitions, 5023 flow [2024-06-04 15:11:03,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5023, PETRI_PLACES=348, PETRI_TRANSITIONS=455} [2024-06-04 15:11:03,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-04 15:11:03,025 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 455 transitions, 5023 flow [2024-06-04 15:11:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:03,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:03,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:03,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:11:03,026 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:03,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash 403122396, now seen corresponding path program 3 times [2024-06-04 15:11:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:03,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578303487] [2024-06-04 15:11:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:03,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:04,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578303487] [2024-06-04 15:11:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578303487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:04,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031715428] [2024-06-04 15:11:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:04,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:04,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:04,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 455 transitions, 5023 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:04,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:04,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:04,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:05,884 INFO L124 PetriNetUnfolderBase]: 3812/6092 cut-off events. [2024-06-04 15:11:05,885 INFO L125 PetriNetUnfolderBase]: For 1147163/1147163 co-relation queries the response was YES. [2024-06-04 15:11:05,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 6092 events. 3812/6092 cut-off events. For 1147163/1147163 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 37380 event pairs, 778 based on Foata normal form. 1/6092 useless extension candidates. Maximal degree in co-relation 58050. Up to 5731 conditions per place. [2024-06-04 15:11:06,005 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 398 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-04 15:11:06,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 473 transitions, 6007 flow [2024-06-04 15:11:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:11:06,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:11:06,007 INFO L175 Difference]: Start difference. First operand has 348 places, 455 transitions, 5023 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:11:06,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 473 transitions, 6007 flow [2024-06-04 15:11:09,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 473 transitions, 5891 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:09,146 INFO L231 Difference]: Finished difference. Result has 350 places, 458 transitions, 5061 flow [2024-06-04 15:11:09,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=350, PETRI_TRANSITIONS=458} [2024-06-04 15:11:09,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-04 15:11:09,146 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 458 transitions, 5061 flow [2024-06-04 15:11:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:09,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:09,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:11:09,147 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1871082692, now seen corresponding path program 1 times [2024-06-04 15:11:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127043523] [2024-06-04 15:11:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:10,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127043523] [2024-06-04 15:11:10,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127043523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:10,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:10,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:10,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386533023] [2024-06-04 15:11:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:10,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:10,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 458 transitions, 5061 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:10,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:10,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:10,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:12,001 INFO L124 PetriNetUnfolderBase]: 3820/6110 cut-off events. [2024-06-04 15:11:12,001 INFO L125 PetriNetUnfolderBase]: For 1174252/1174254 co-relation queries the response was YES. [2024-06-04 15:11:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58492 conditions, 6110 events. 3820/6110 cut-off events. For 1174252/1174254 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37403 event pairs, 688 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 58330. Up to 5674 conditions per place. [2024-06-04 15:11:12,093 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 414 selfloop transitions, 49 changer transitions 0/488 dead transitions. [2024-06-04 15:11:12,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 488 transitions, 6371 flow [2024-06-04 15:11:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:11:12,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:11:12,094 INFO L175 Difference]: Start difference. First operand has 350 places, 458 transitions, 5061 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:11:12,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 488 transitions, 6371 flow [2024-06-04 15:11:14,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 488 transitions, 6232 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:14,643 INFO L231 Difference]: Finished difference. Result has 352 places, 462 transitions, 5121 flow [2024-06-04 15:11:14,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5121, PETRI_PLACES=352, PETRI_TRANSITIONS=462} [2024-06-04 15:11:14,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-04 15:11:14,644 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 462 transitions, 5121 flow [2024-06-04 15:11:14,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:14,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:14,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:14,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:11:14,644 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:14,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash 393173070, now seen corresponding path program 2 times [2024-06-04 15:11:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895755563] [2024-06-04 15:11:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895755563] [2024-06-04 15:11:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895755563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697182380] [2024-06-04 15:11:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:16,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:16,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 462 transitions, 5121 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:16,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:16,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:17,781 INFO L124 PetriNetUnfolderBase]: 3827/6119 cut-off events. [2024-06-04 15:11:17,782 INFO L125 PetriNetUnfolderBase]: For 1195535/1195537 co-relation queries the response was YES. [2024-06-04 15:11:17,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58919 conditions, 6119 events. 3827/6119 cut-off events. For 1195535/1195537 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37565 event pairs, 826 based on Foata normal form. 4/6122 useless extension candidates. Maximal degree in co-relation 58756. Up to 5751 conditions per place. [2024-06-04 15:11:17,881 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 409 selfloop transitions, 51 changer transitions 0/485 dead transitions. [2024-06-04 15:11:17,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 485 transitions, 6157 flow [2024-06-04 15:11:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:11:17,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-04 15:11:17,882 INFO L175 Difference]: Start difference. First operand has 352 places, 462 transitions, 5121 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:11:17,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 485 transitions, 6157 flow [2024-06-04 15:11:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 485 transitions, 6022 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:20,627 INFO L231 Difference]: Finished difference. Result has 356 places, 464 transitions, 5147 flow [2024-06-04 15:11:20,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5147, PETRI_PLACES=356, PETRI_TRANSITIONS=464} [2024-06-04 15:11:20,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-04 15:11:20,628 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 464 transitions, 5147 flow [2024-06-04 15:11:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:20,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:20,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:20,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:11:20,628 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:20,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2128426394, now seen corresponding path program 3 times [2024-06-04 15:11:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570019086] [2024-06-04 15:11:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570019086] [2024-06-04 15:11:21,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570019086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:21,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:21,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689639130] [2024-06-04 15:11:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:21,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:21,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 464 transitions, 5147 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:21,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:21,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:21,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:23,261 INFO L124 PetriNetUnfolderBase]: 3838/6128 cut-off events. [2024-06-04 15:11:23,261 INFO L125 PetriNetUnfolderBase]: For 1217024/1217024 co-relation queries the response was YES. [2024-06-04 15:11:23,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59165 conditions, 6128 events. 3838/6128 cut-off events. For 1217024/1217024 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37530 event pairs, 778 based on Foata normal form. 2/6129 useless extension candidates. Maximal degree in co-relation 59000. Up to 5764 conditions per place. [2024-06-04 15:11:23,355 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 408 selfloop transitions, 49 changer transitions 0/482 dead transitions. [2024-06-04 15:11:23,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 482 transitions, 6143 flow [2024-06-04 15:11:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:11:23,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:11:23,376 INFO L175 Difference]: Start difference. First operand has 356 places, 464 transitions, 5147 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:11:23,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 482 transitions, 6143 flow [2024-06-04 15:11:26,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 482 transitions, 6022 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:26,854 INFO L231 Difference]: Finished difference. Result has 358 places, 466 transitions, 5167 flow [2024-06-04 15:11:26,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5167, PETRI_PLACES=358, PETRI_TRANSITIONS=466} [2024-06-04 15:11:26,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-04 15:11:26,854 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 466 transitions, 5167 flow [2024-06-04 15:11:26,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:26,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:26,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:26,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:11:26,855 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:26,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2128056998, now seen corresponding path program 1 times [2024-06-04 15:11:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157774404] [2024-06-04 15:11:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:27,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157774404] [2024-06-04 15:11:27,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157774404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:27,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:11:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728377831] [2024-06-04 15:11:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:11:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:11:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:11:27,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:11:27,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 466 transitions, 5167 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:27,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:27,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:11:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:29,763 INFO L124 PetriNetUnfolderBase]: 3937/6237 cut-off events. [2024-06-04 15:11:29,763 INFO L125 PetriNetUnfolderBase]: For 1247253/1247253 co-relation queries the response was YES. [2024-06-04 15:11:29,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60023 conditions, 6237 events. 3937/6237 cut-off events. For 1247253/1247253 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37815 event pairs, 810 based on Foata normal form. 4/6240 useless extension candidates. Maximal degree in co-relation 59857. Up to 5882 conditions per place. [2024-06-04 15:11:29,860 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 78 changer transitions 0/494 dead transitions. [2024-06-04 15:11:29,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 6593 flow [2024-06-04 15:11:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:11:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:11:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:11:29,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-04 15:11:29,861 INFO L175 Difference]: Start difference. First operand has 358 places, 466 transitions, 5167 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:11:29,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 6593 flow [2024-06-04 15:11:33,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 494 transitions, 6472 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:33,118 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 5338 flow [2024-06-04 15:11:33,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5338, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2024-06-04 15:11:33,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-04 15:11:33,119 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 5338 flow [2024-06-04 15:11:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:33,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:33,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:11:33,120 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:33,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 540584022, now seen corresponding path program 4 times [2024-06-04 15:11:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111113838] [2024-06-04 15:11:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:34,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111113838] [2024-06-04 15:11:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111113838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:34,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627637232] [2024-06-04 15:11:34,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:34,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:34,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 5338 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:34,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:36,046 INFO L124 PetriNetUnfolderBase]: 3866/6176 cut-off events. [2024-06-04 15:11:36,046 INFO L125 PetriNetUnfolderBase]: For 1264823/1264827 co-relation queries the response was YES. [2024-06-04 15:11:36,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60391 conditions, 6176 events. 3866/6176 cut-off events. For 1264823/1264827 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37888 event pairs, 842 based on Foata normal form. 6/6181 useless extension candidates. Maximal degree in co-relation 60224. Up to 5740 conditions per place. [2024-06-04 15:11:36,144 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 51 changer transitions 0/495 dead transitions. [2024-06-04 15:11:36,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 495 transitions, 6456 flow [2024-06-04 15:11:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:11:36,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:11:36,146 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 5338 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:11:36,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 495 transitions, 6456 flow [2024-06-04 15:11:39,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 495 transitions, 6351 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:11:39,935 INFO L231 Difference]: Finished difference. Result has 364 places, 475 transitions, 5447 flow [2024-06-04 15:11:39,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5447, PETRI_PLACES=364, PETRI_TRANSITIONS=475} [2024-06-04 15:11:39,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-04 15:11:39,936 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 475 transitions, 5447 flow [2024-06-04 15:11:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:39,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:39,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:39,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:11:39,937 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:39,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:39,937 INFO L85 PathProgramCache]: Analyzing trace with hash 414231394, now seen corresponding path program 5 times [2024-06-04 15:11:39,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:39,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934810664] [2024-06-04 15:11:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934810664] [2024-06-04 15:11:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934810664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:40,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820299888] [2024-06-04 15:11:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:40,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:41,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:41,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 475 transitions, 5447 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:41,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:41,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:41,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:42,647 INFO L124 PetriNetUnfolderBase]: 3900/6225 cut-off events. [2024-06-04 15:11:42,647 INFO L125 PetriNetUnfolderBase]: For 1310358/1310362 co-relation queries the response was YES. [2024-06-04 15:11:42,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62008 conditions, 6225 events. 3900/6225 cut-off events. For 1310358/1310362 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38193 event pairs, 844 based on Foata normal form. 6/6230 useless extension candidates. Maximal degree in co-relation 61839. Up to 5642 conditions per place. [2024-06-04 15:11:42,740 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 93 changer transitions 0/507 dead transitions. [2024-06-04 15:11:42,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 507 transitions, 7505 flow [2024-06-04 15:11:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 15:11:42,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-04 15:11:42,741 INFO L175 Difference]: Start difference. First operand has 364 places, 475 transitions, 5447 flow. Second operand 8 states and 155 transitions. [2024-06-04 15:11:42,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 507 transitions, 7505 flow [2024-06-04 15:11:46,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 507 transitions, 7317 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 15:11:46,801 INFO L231 Difference]: Finished difference. Result has 366 places, 484 transitions, 5769 flow [2024-06-04 15:11:46,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5769, PETRI_PLACES=366, PETRI_TRANSITIONS=484} [2024-06-04 15:11:46,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-04 15:11:46,801 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 484 transitions, 5769 flow [2024-06-04 15:11:46,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:46,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:46,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:11:46,802 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:46,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 414231580, now seen corresponding path program 4 times [2024-06-04 15:11:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:46,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820871781] [2024-06-04 15:11:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:47,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:47,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820871781] [2024-06-04 15:11:47,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820871781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:47,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:47,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758262145] [2024-06-04 15:11:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:47,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:11:47,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 484 transitions, 5769 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:47,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:47,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:11:47,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:49,275 INFO L124 PetriNetUnfolderBase]: 3999/6331 cut-off events. [2024-06-04 15:11:49,276 INFO L125 PetriNetUnfolderBase]: For 1342447/1342451 co-relation queries the response was YES. [2024-06-04 15:11:49,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63472 conditions, 6331 events. 3999/6331 cut-off events. For 1342447/1342451 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38500 event pairs, 874 based on Foata normal form. 6/6336 useless extension candidates. Maximal degree in co-relation 63302. Up to 5959 conditions per place. [2024-06-04 15:11:49,398 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 79 changer transitions 0/512 dead transitions. [2024-06-04 15:11:49,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 512 transitions, 7509 flow [2024-06-04 15:11:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:11:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:11:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:11:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-04 15:11:49,399 INFO L175 Difference]: Start difference. First operand has 366 places, 484 transitions, 5769 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:11:49,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 512 transitions, 7509 flow [2024-06-04 15:11:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 512 transitions, 7271 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-04 15:11:53,911 INFO L231 Difference]: Finished difference. Result has 371 places, 490 transitions, 5861 flow [2024-06-04 15:11:53,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5861, PETRI_PLACES=371, PETRI_TRANSITIONS=490} [2024-06-04 15:11:53,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-04 15:11:53,912 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 490 transitions, 5861 flow [2024-06-04 15:11:53,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:53,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:53,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:11:53,913 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:11:53,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 642012574, now seen corresponding path program 6 times [2024-06-04 15:11:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505509674] [2024-06-04 15:11:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:54,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505509674] [2024-06-04 15:11:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505509674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:54,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:54,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:11:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239959003] [2024-06-04 15:11:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:11:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:11:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:11:54,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:11:54,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 490 transitions, 5861 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:54,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:54,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:11:54,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:56,601 INFO L124 PetriNetUnfolderBase]: 3928/6264 cut-off events. [2024-06-04 15:11:56,601 INFO L125 PetriNetUnfolderBase]: For 1371131/1371135 co-relation queries the response was YES. [2024-06-04 15:11:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63658 conditions, 6264 events. 3928/6264 cut-off events. For 1371131/1371135 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38498 event pairs, 849 based on Foata normal form. 6/6269 useless extension candidates. Maximal degree in co-relation 63486. Up to 5789 conditions per place. [2024-06-04 15:11:56,697 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 65 changer transitions 0/518 dead transitions. [2024-06-04 15:11:56,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 518 transitions, 7259 flow [2024-06-04 15:11:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:11:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:11:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 15:11:56,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-04 15:11:56,699 INFO L175 Difference]: Start difference. First operand has 371 places, 490 transitions, 5861 flow. Second operand 10 states and 182 transitions. [2024-06-04 15:11:56,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 518 transitions, 7259 flow [2024-06-04 15:12:00,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 518 transitions, 7013 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:00,624 INFO L231 Difference]: Finished difference. Result has 378 places, 493 transitions, 5836 flow [2024-06-04 15:12:00,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5836, PETRI_PLACES=378, PETRI_TRANSITIONS=493} [2024-06-04 15:12:00,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-04 15:12:00,625 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 493 transitions, 5836 flow [2024-06-04 15:12:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:00,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:00,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:12:00,626 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:00,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash 653440414, now seen corresponding path program 7 times [2024-06-04 15:12:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:00,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486908117] [2024-06-04 15:12:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:00,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:01,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:01,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486908117] [2024-06-04 15:12:01,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486908117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:01,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:01,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590539183] [2024-06-04 15:12:01,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:01,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:01,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:12:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 493 transitions, 5836 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:01,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:12:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:03,210 INFO L124 PetriNetUnfolderBase]: 3920/6258 cut-off events. [2024-06-04 15:12:03,211 INFO L125 PetriNetUnfolderBase]: For 1378457/1378461 co-relation queries the response was YES. [2024-06-04 15:12:03,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63472 conditions, 6258 events. 3920/6258 cut-off events. For 1378457/1378461 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 38491 event pairs, 844 based on Foata normal form. 6/6263 useless extension candidates. Maximal degree in co-relation 63297. Up to 5784 conditions per place. [2024-06-04 15:12:03,314 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 420 selfloop transitions, 64 changer transitions 0/511 dead transitions. [2024-06-04 15:12:03,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 511 transitions, 6888 flow [2024-06-04 15:12:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:12:03,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-04 15:12:03,316 INFO L175 Difference]: Start difference. First operand has 378 places, 493 transitions, 5836 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:12:03,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 511 transitions, 6888 flow [2024-06-04 15:12:07,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 511 transitions, 6679 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-04 15:12:07,358 INFO L231 Difference]: Finished difference. Result has 378 places, 493 transitions, 5761 flow [2024-06-04 15:12:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5761, PETRI_PLACES=378, PETRI_TRANSITIONS=493} [2024-06-04 15:12:07,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-04 15:12:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 493 transitions, 5761 flow [2024-06-04 15:12:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:07,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:07,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:12:07,359 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:07,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2079786, now seen corresponding path program 8 times [2024-06-04 15:12:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:07,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096946766] [2024-06-04 15:12:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096946766] [2024-06-04 15:12:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096946766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:08,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963846077] [2024-06-04 15:12:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:08,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:12:08,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 493 transitions, 5761 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:08,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:08,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:12:08,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:09,937 INFO L124 PetriNetUnfolderBase]: 3946/6298 cut-off events. [2024-06-04 15:12:09,937 INFO L125 PetriNetUnfolderBase]: For 1414811/1414815 co-relation queries the response was YES. [2024-06-04 15:12:10,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64196 conditions, 6298 events. 3946/6298 cut-off events. For 1414811/1414815 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38815 event pairs, 845 based on Foata normal form. 6/6303 useless extension candidates. Maximal degree in co-relation 64020. Up to 5690 conditions per place. [2024-06-04 15:12:10,037 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 106 changer transitions 0/518 dead transitions. [2024-06-04 15:12:10,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 518 transitions, 7467 flow [2024-06-04 15:12:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:12:10,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:12:10,039 INFO L175 Difference]: Start difference. First operand has 378 places, 493 transitions, 5761 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:12:10,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 518 transitions, 7467 flow [2024-06-04 15:12:13,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 518 transitions, 7339 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:12:13,896 INFO L231 Difference]: Finished difference. Result has 379 places, 499 transitions, 6011 flow [2024-06-04 15:12:13,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6011, PETRI_PLACES=379, PETRI_TRANSITIONS=499} [2024-06-04 15:12:13,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-04 15:12:13,897 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 499 transitions, 6011 flow [2024-06-04 15:12:13,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:13,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:13,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:13,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:12:13,897 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:13,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2074020, now seen corresponding path program 5 times [2024-06-04 15:12:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:13,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577453730] [2024-06-04 15:12:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577453730] [2024-06-04 15:12:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577453730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:14,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841629564] [2024-06-04 15:12:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:14,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:14,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:12:14,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 499 transitions, 6011 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:14,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:14,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:12:14,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:16,307 INFO L124 PetriNetUnfolderBase]: 4055/6411 cut-off events. [2024-06-04 15:12:16,308 INFO L125 PetriNetUnfolderBase]: For 1449233/1449237 co-relation queries the response was YES. [2024-06-04 15:12:16,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65473 conditions, 6411 events. 4055/6411 cut-off events. For 1449233/1449237 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 39020 event pairs, 868 based on Foata normal form. 6/6416 useless extension candidates. Maximal degree in co-relation 65296. Up to 6026 conditions per place. [2024-06-04 15:12:16,407 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 86 changer transitions 0/524 dead transitions. [2024-06-04 15:12:16,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 524 transitions, 7703 flow [2024-06-04 15:12:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:12:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:12:16,408 INFO L175 Difference]: Start difference. First operand has 379 places, 499 transitions, 6011 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:12:16,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 524 transitions, 7703 flow [2024-06-04 15:12:19,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 524 transitions, 7476 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:19,640 INFO L231 Difference]: Finished difference. Result has 382 places, 505 transitions, 6046 flow [2024-06-04 15:12:19,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6046, PETRI_PLACES=382, PETRI_TRANSITIONS=505} [2024-06-04 15:12:19,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-04 15:12:19,641 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 505 transitions, 6046 flow [2024-06-04 15:12:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:19,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:19,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:19,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:12:19,641 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:19,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1093236134, now seen corresponding path program 9 times [2024-06-04 15:12:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:19,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709357889] [2024-06-04 15:12:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:19,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:20,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709357889] [2024-06-04 15:12:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709357889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011443936] [2024-06-04 15:12:20,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:20,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:20,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:20,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:12:20,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 505 transitions, 6046 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:20,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:20,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:12:20,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:22,241 INFO L124 PetriNetUnfolderBase]: 3961/6319 cut-off events. [2024-06-04 15:12:22,241 INFO L125 PetriNetUnfolderBase]: For 1460935/1460939 co-relation queries the response was YES. [2024-06-04 15:12:22,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64651 conditions, 6319 events. 3961/6319 cut-off events. For 1460935/1460939 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38955 event pairs, 840 based on Foata normal form. 6/6324 useless extension candidates. Maximal degree in co-relation 64474. Up to 5710 conditions per place. [2024-06-04 15:12:22,344 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 105 changer transitions 0/523 dead transitions. [2024-06-04 15:12:22,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 523 transitions, 7372 flow [2024-06-04 15:12:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:12:22,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:12:22,346 INFO L175 Difference]: Start difference. First operand has 382 places, 505 transitions, 6046 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:12:22,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 523 transitions, 7372 flow [2024-06-04 15:12:26,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 523 transitions, 7170 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:26,837 INFO L231 Difference]: Finished difference. Result has 386 places, 505 transitions, 6060 flow [2024-06-04 15:12:26,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=386, PETRI_TRANSITIONS=505} [2024-06-04 15:12:26,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-04 15:12:26,837 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 505 transitions, 6060 flow [2024-06-04 15:12:26,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:26,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:26,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:26,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:12:26,838 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:26,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:26,838 INFO L85 PathProgramCache]: Analyzing trace with hash -773314278, now seen corresponding path program 6 times [2024-06-04 15:12:26,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363449335] [2024-06-04 15:12:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:27,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:27,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363449335] [2024-06-04 15:12:27,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363449335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:27,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:27,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:27,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603516292] [2024-06-04 15:12:27,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:27,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:27,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:12:27,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 505 transitions, 6060 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:27,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:27,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:12:27,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:29,658 INFO L124 PetriNetUnfolderBase]: 4043/6397 cut-off events. [2024-06-04 15:12:29,658 INFO L125 PetriNetUnfolderBase]: For 1468669/1468673 co-relation queries the response was YES. [2024-06-04 15:12:29,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65070 conditions, 6397 events. 4043/6397 cut-off events. For 1468669/1468673 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38948 event pairs, 868 based on Foata normal form. 6/6402 useless extension candidates. Maximal degree in co-relation 64892. Up to 6013 conditions per place. [2024-06-04 15:12:29,784 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 84 changer transitions 0/523 dead transitions. [2024-06-04 15:12:29,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 523 transitions, 7438 flow [2024-06-04 15:12:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:12:29,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:12:29,786 INFO L175 Difference]: Start difference. First operand has 386 places, 505 transitions, 6060 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:12:29,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 523 transitions, 7438 flow [2024-06-04 15:12:34,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 523 transitions, 7196 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 15:12:34,463 INFO L231 Difference]: Finished difference. Result has 387 places, 505 transitions, 5992 flow [2024-06-04 15:12:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5818, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=387, PETRI_TRANSITIONS=505} [2024-06-04 15:12:34,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-04 15:12:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 505 transitions, 5992 flow [2024-06-04 15:12:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:34,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:12:34,464 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1562895046, now seen corresponding path program 7 times [2024-06-04 15:12:34,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:34,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084417503] [2024-06-04 15:12:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:35,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:35,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084417503] [2024-06-04 15:12:35,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084417503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:35,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:35,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154579934] [2024-06-04 15:12:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:35,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:12:35,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 505 transitions, 5992 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:35,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:35,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:12:35,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:36,850 INFO L124 PetriNetUnfolderBase]: 4053/6410 cut-off events. [2024-06-04 15:12:36,851 INFO L125 PetriNetUnfolderBase]: For 1491283/1491287 co-relation queries the response was YES. [2024-06-04 15:12:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65292 conditions, 6410 events. 4053/6410 cut-off events. For 1491283/1491287 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38968 event pairs, 868 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 65113. Up to 6184 conditions per place. [2024-06-04 15:12:36,978 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 477 selfloop transitions, 40 changer transitions 0/521 dead transitions. [2024-06-04 15:12:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 521 transitions, 7388 flow [2024-06-04 15:12:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:12:36,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-04 15:12:36,979 INFO L175 Difference]: Start difference. First operand has 387 places, 505 transitions, 5992 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:12:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 521 transitions, 7388 flow [2024-06-04 15:12:42,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 521 transitions, 7251 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:42,440 INFO L231 Difference]: Finished difference. Result has 389 places, 508 transitions, 6005 flow [2024-06-04 15:12:42,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=389, PETRI_TRANSITIONS=508} [2024-06-04 15:12:42,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-04 15:12:42,441 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 508 transitions, 6005 flow [2024-06-04 15:12:42,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:42,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:42,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:12:42,441 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -566311262, now seen corresponding path program 4 times [2024-06-04 15:12:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829826132] [2024-06-04 15:12:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:43,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:43,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829826132] [2024-06-04 15:12:43,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829826132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:43,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386384799] [2024-06-04 15:12:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:43,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:43,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:12:43,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 508 transitions, 6005 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:43,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:43,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:12:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:45,319 INFO L124 PetriNetUnfolderBase]: 3964/6315 cut-off events. [2024-06-04 15:12:45,319 INFO L125 PetriNetUnfolderBase]: For 1503841/1503841 co-relation queries the response was YES. [2024-06-04 15:12:45,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64703 conditions, 6315 events. 3964/6315 cut-off events. For 1503841/1503841 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38757 event pairs, 793 based on Foata normal form. 1/6315 useless extension candidates. Maximal degree in co-relation 64523. Up to 5933 conditions per place. [2024-06-04 15:12:45,422 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 49 changer transitions 0/518 dead transitions. [2024-06-04 15:12:45,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 518 transitions, 7009 flow [2024-06-04 15:12:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:12:45,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:12:45,423 INFO L175 Difference]: Start difference. First operand has 389 places, 508 transitions, 6005 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:12:45,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 518 transitions, 7009 flow [2024-06-04 15:12:48,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 518 transitions, 6835 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:48,899 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 5935 flow [2024-06-04 15:12:48,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5935, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-04 15:12:48,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-04 15:12:48,899 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 5935 flow [2024-06-04 15:12:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:48,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:48,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:48,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:12:48,900 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:48,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -806390790, now seen corresponding path program 8 times [2024-06-04 15:12:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:48,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501173842] [2024-06-04 15:12:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:49,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501173842] [2024-06-04 15:12:49,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501173842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:49,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:49,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:49,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492982194] [2024-06-04 15:12:49,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:49,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:49,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:12:49,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 5935 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:49,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:49,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:12:49,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:51,649 INFO L124 PetriNetUnfolderBase]: 4076/6448 cut-off events. [2024-06-04 15:12:51,649 INFO L125 PetriNetUnfolderBase]: For 1544675/1544679 co-relation queries the response was YES. [2024-06-04 15:12:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65798 conditions, 6448 events. 4076/6448 cut-off events. For 1544675/1544679 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 39308 event pairs, 862 based on Foata normal form. 6/6453 useless extension candidates. Maximal degree in co-relation 65617. Up to 6155 conditions per place. [2024-06-04 15:12:51,741 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 459 selfloop transitions, 66 changer transitions 0/529 dead transitions. [2024-06-04 15:12:51,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 529 transitions, 7641 flow [2024-06-04 15:12:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:12:51,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:12:51,742 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 5935 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:12:51,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 529 transitions, 7641 flow [2024-06-04 15:12:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 529 transitions, 7465 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:12:56,961 INFO L231 Difference]: Finished difference. Result has 391 places, 514 transitions, 5993 flow [2024-06-04 15:12:56,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5759, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5993, PETRI_PLACES=391, PETRI_TRANSITIONS=514} [2024-06-04 15:12:56,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-04 15:12:56,961 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 514 transitions, 5993 flow [2024-06-04 15:12:56,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:56,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:56,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:56,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:12:56,962 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:56,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -983938206, now seen corresponding path program 10 times [2024-06-04 15:12:56,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:56,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603459820] [2024-06-04 15:12:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:57,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603459820] [2024-06-04 15:12:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603459820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:57,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:57,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909653160] [2024-06-04 15:12:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:57,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:12:57,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 514 transitions, 5993 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:57,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:57,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:12:57,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:59,558 INFO L124 PetriNetUnfolderBase]: 3980/6348 cut-off events. [2024-06-04 15:12:59,558 INFO L125 PetriNetUnfolderBase]: For 1557357/1557361 co-relation queries the response was YES. [2024-06-04 15:12:59,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65138 conditions, 6348 events. 3980/6348 cut-off events. For 1557357/1557361 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39104 event pairs, 842 based on Foata normal form. 6/6353 useless extension candidates. Maximal degree in co-relation 64956. Up to 5999 conditions per place. [2024-06-04 15:12:59,660 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 465 selfloop transitions, 29 changer transitions 0/526 dead transitions. [2024-06-04 15:12:59,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 526 transitions, 7041 flow [2024-06-04 15:12:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:12:59,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:12:59,662 INFO L175 Difference]: Start difference. First operand has 391 places, 514 transitions, 5993 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:12:59,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 526 transitions, 7041 flow [2024-06-04 15:13:04,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 526 transitions, 6758 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:04,015 INFO L231 Difference]: Finished difference. Result has 393 places, 514 transitions, 5774 flow [2024-06-04 15:13:04,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5710, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5774, PETRI_PLACES=393, PETRI_TRANSITIONS=514} [2024-06-04 15:13:04,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-04 15:13:04,016 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 514 transitions, 5774 flow [2024-06-04 15:13:04,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:04,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:04,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:04,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:13:04,016 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:04,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:04,017 INFO L85 PathProgramCache]: Analyzing trace with hash -983700870, now seen corresponding path program 9 times [2024-06-04 15:13:04,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:04,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800229219] [2024-06-04 15:13:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800229219] [2024-06-04 15:13:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800229219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:04,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:04,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703344265] [2024-06-04 15:13:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:04,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:13:04,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 514 transitions, 5774 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:04,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:04,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:13:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:06,648 INFO L124 PetriNetUnfolderBase]: 4080/6452 cut-off events. [2024-06-04 15:13:06,648 INFO L125 PetriNetUnfolderBase]: For 1575826/1575830 co-relation queries the response was YES. [2024-06-04 15:13:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65694 conditions, 6452 events. 4080/6452 cut-off events. For 1575826/1575830 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 39279 event pairs, 872 based on Foata normal form. 6/6457 useless extension candidates. Maximal degree in co-relation 65511. Up to 6241 conditions per place. [2024-06-04 15:13:06,761 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 489 selfloop transitions, 36 changer transitions 0/529 dead transitions. [2024-06-04 15:13:06,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 529 transitions, 6928 flow [2024-06-04 15:13:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:13:06,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 15:13:06,763 INFO L175 Difference]: Start difference. First operand has 393 places, 514 transitions, 5774 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:13:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 529 transitions, 6928 flow [2024-06-04 15:13:12,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 529 transitions, 6828 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 15:13:12,528 INFO L231 Difference]: Finished difference. Result has 394 places, 518 transitions, 5818 flow [2024-06-04 15:13:12,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5818, PETRI_PLACES=394, PETRI_TRANSITIONS=518} [2024-06-04 15:13:12,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-04 15:13:12,528 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 518 transitions, 5818 flow [2024-06-04 15:13:12,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:12,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:12,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:12,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:13:12,529 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:12,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash -806569536, now seen corresponding path program 11 times [2024-06-04 15:13:12,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:12,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334948133] [2024-06-04 15:13:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:12,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334948133] [2024-06-04 15:13:13,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334948133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:13,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:13,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059840733] [2024-06-04 15:13:13,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:13,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:13,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:13,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 518 transitions, 5818 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:13,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:13,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:13,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:15,225 INFO L124 PetriNetUnfolderBase]: 3994/6376 cut-off events. [2024-06-04 15:13:15,226 INFO L125 PetriNetUnfolderBase]: For 1603542/1603546 co-relation queries the response was YES. [2024-06-04 15:13:15,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65477 conditions, 6376 events. 3994/6376 cut-off events. For 1603542/1603546 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39388 event pairs, 835 based on Foata normal form. 6/6381 useless extension candidates. Maximal degree in co-relation 65293. Up to 5980 conditions per place. [2024-06-04 15:13:15,347 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 48 changer transitions 0/535 dead transitions. [2024-06-04 15:13:15,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 535 transitions, 7223 flow [2024-06-04 15:13:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:13:15,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-04 15:13:15,348 INFO L175 Difference]: Start difference. First operand has 394 places, 518 transitions, 5818 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:13:15,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 535 transitions, 7223 flow [2024-06-04 15:13:21,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 535 transitions, 7121 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:21,017 INFO L231 Difference]: Finished difference. Result has 397 places, 521 transitions, 5895 flow [2024-06-04 15:13:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5716, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=397, PETRI_TRANSITIONS=521} [2024-06-04 15:13:21,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-04 15:13:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 521 transitions, 5895 flow [2024-06-04 15:13:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:21,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:21,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:13:21,018 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash -578489640, now seen corresponding path program 10 times [2024-06-04 15:13:21,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:21,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599355308] [2024-06-04 15:13:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599355308] [2024-06-04 15:13:21,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599355308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:21,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:21,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:21,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095233699] [2024-06-04 15:13:21,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:21,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:21,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:13:21,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 521 transitions, 5895 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:21,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:21,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:13:21,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:23,557 INFO L124 PetriNetUnfolderBase]: 4084/6460 cut-off events. [2024-06-04 15:13:23,557 INFO L125 PetriNetUnfolderBase]: For 1610376/1610380 co-relation queries the response was YES. [2024-06-04 15:13:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65965 conditions, 6460 events. 4084/6460 cut-off events. For 1610376/1610380 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39384 event pairs, 873 based on Foata normal form. 6/6465 useless extension candidates. Maximal degree in co-relation 65780. Up to 6223 conditions per place. [2024-06-04 15:13:23,664 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 48 changer transitions 0/534 dead transitions. [2024-06-04 15:13:23,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 534 transitions, 7265 flow [2024-06-04 15:13:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:13:23,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-04 15:13:23,665 INFO L175 Difference]: Start difference. First operand has 397 places, 521 transitions, 5895 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:13:23,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 534 transitions, 7265 flow [2024-06-04 15:13:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 534 transitions, 7063 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:28,798 INFO L231 Difference]: Finished difference. Result has 399 places, 521 transitions, 5795 flow [2024-06-04 15:13:28,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5795, PETRI_PLACES=399, PETRI_TRANSITIONS=521} [2024-06-04 15:13:28,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-04 15:13:28,799 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 521 transitions, 5795 flow [2024-06-04 15:13:28,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:28,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:28,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:28,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:13:28,800 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash -806806500, now seen corresponding path program 11 times [2024-06-04 15:13:28,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833021335] [2024-06-04 15:13:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833021335] [2024-06-04 15:13:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833021335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975075223] [2024-06-04 15:13:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:29,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:13:29,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 521 transitions, 5795 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:29,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:29,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:13:29,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:31,264 INFO L124 PetriNetUnfolderBase]: 4078/6458 cut-off events. [2024-06-04 15:13:31,264 INFO L125 PetriNetUnfolderBase]: For 1617737/1617741 co-relation queries the response was YES. [2024-06-04 15:13:31,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 6458 events. 4078/6458 cut-off events. For 1617737/1617741 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39477 event pairs, 864 based on Foata normal form. 6/6463 useless extension candidates. Maximal degree in co-relation 65564. Up to 6161 conditions per place. [2024-06-04 15:13:31,371 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 69 changer transitions 0/535 dead transitions. [2024-06-04 15:13:31,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 535 transitions, 7185 flow [2024-06-04 15:13:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:13:31,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-04 15:13:31,373 INFO L175 Difference]: Start difference. First operand has 399 places, 521 transitions, 5795 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:13:31,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 535 transitions, 7185 flow [2024-06-04 15:13:38,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 535 transitions, 7023 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:38,414 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5777 flow [2024-06-04 15:13:38,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5777, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-04 15:13:38,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-04 15:13:38,414 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5777 flow [2024-06-04 15:13:38,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:38,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:38,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:38,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:13:38,415 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:38,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1256725530, now seen corresponding path program 12 times [2024-06-04 15:13:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:38,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31492838] [2024-06-04 15:13:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:39,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31492838] [2024-06-04 15:13:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31492838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:39,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:39,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:39,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682071868] [2024-06-04 15:13:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:39,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:39,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5777 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:39,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:39,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:39,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:40,998 INFO L124 PetriNetUnfolderBase]: 3977/6359 cut-off events. [2024-06-04 15:13:40,998 INFO L125 PetriNetUnfolderBase]: For 1629302/1629306 co-relation queries the response was YES. [2024-06-04 15:13:41,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65021 conditions, 6359 events. 3977/6359 cut-off events. For 1629302/1629306 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39369 event pairs, 837 based on Foata normal form. 6/6364 useless extension candidates. Maximal degree in co-relation 64835. Up to 5964 conditions per place. [2024-06-04 15:13:41,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 46 changer transitions 0/534 dead transitions. [2024-06-04 15:13:41,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 534 transitions, 6855 flow [2024-06-04 15:13:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:13:41,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-04 15:13:41,311 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5777 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:13:41,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 534 transitions, 6855 flow [2024-06-04 15:13:47,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 534 transitions, 6619 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 15:13:47,028 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5639 flow [2024-06-04 15:13:47,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5639, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-04 15:13:47,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-04 15:13:47,029 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5639 flow [2024-06-04 15:13:47,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:47,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:47,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:13:47,030 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:47,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash -584203560, now seen corresponding path program 12 times [2024-06-04 15:13:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490130381] [2024-06-04 15:13:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:47,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490130381] [2024-06-04 15:13:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490130381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:47,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311583427] [2024-06-04 15:13:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:47,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:13:47,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5639 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:47,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:47,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:13:47,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:49,800 INFO L124 PetriNetUnfolderBase]: 4066/6436 cut-off events. [2024-06-04 15:13:49,800 INFO L125 PetriNetUnfolderBase]: For 1633285/1633289 co-relation queries the response was YES. [2024-06-04 15:13:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65277 conditions, 6436 events. 4066/6436 cut-off events. For 1633285/1633289 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39236 event pairs, 870 based on Foata normal form. 6/6441 useless extension candidates. Maximal degree in co-relation 65090. Up to 6223 conditions per place. [2024-06-04 15:13:49,909 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 37 changer transitions 0/532 dead transitions. [2024-06-04 15:13:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 532 transitions, 6739 flow [2024-06-04 15:13:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:13:49,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-04 15:13:49,911 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5639 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:13:49,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 532 transitions, 6739 flow [2024-06-04 15:13:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 532 transitions, 6563 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:13:55,159 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5543 flow [2024-06-04 15:13:55,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5543, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-04 15:13:55,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-04 15:13:55,160 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5543 flow [2024-06-04 15:13:55,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:55,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:55,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:13:55,160 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:55,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash -984061338, now seen corresponding path program 4 times [2024-06-04 15:13:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:55,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750690396] [2024-06-04 15:13:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:56,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:56,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750690396] [2024-06-04 15:13:56,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750690396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:56,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:56,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:56,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689093933] [2024-06-04 15:13:56,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:56,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:56,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5543 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:56,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:56,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:58,042 INFO L124 PetriNetUnfolderBase]: 3971/6334 cut-off events. [2024-06-04 15:13:58,042 INFO L125 PetriNetUnfolderBase]: For 1644094/1644094 co-relation queries the response was YES. [2024-06-04 15:13:58,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64533 conditions, 6334 events. 3971/6334 cut-off events. For 1644094/1644094 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 38953 event pairs, 790 based on Foata normal form. 2/6335 useless extension candidates. Maximal degree in co-relation 64345. Up to 5939 conditions per place. [2024-06-04 15:13:58,179 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 451 selfloop transitions, 48 changer transitions 0/532 dead transitions. [2024-06-04 15:13:58,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 532 transitions, 6571 flow [2024-06-04 15:13:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:13:58,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 15:13:58,180 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5543 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:13:58,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 532 transitions, 6571 flow [2024-06-04 15:14:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 532 transitions, 6429 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 15:14:02,383 INFO L231 Difference]: Finished difference. Result has 400 places, 521 transitions, 5502 flow [2024-06-04 15:14:02,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5502, PETRI_PLACES=400, PETRI_TRANSITIONS=521} [2024-06-04 15:14:02,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-04 15:14:02,384 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 521 transitions, 5502 flow [2024-06-04 15:14:02,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:02,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:02,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:14:02,385 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:02,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1433610786, now seen corresponding path program 2 times [2024-06-04 15:14:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:02,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969483865] [2024-06-04 15:14:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:03,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:03,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969483865] [2024-06-04 15:14:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969483865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:03,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913209764] [2024-06-04 15:14:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:03,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:14:03,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 521 transitions, 5502 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:03,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:03,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:14:03,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:05,319 INFO L124 PetriNetUnfolderBase]: 4081/6452 cut-off events. [2024-06-04 15:14:05,319 INFO L125 PetriNetUnfolderBase]: For 1682689/1682689 co-relation queries the response was YES. [2024-06-04 15:14:05,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65474 conditions, 6452 events. 4081/6452 cut-off events. For 1682689/1682689 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39239 event pairs, 816 based on Foata normal form. 4/6455 useless extension candidates. Maximal degree in co-relation 65285. Up to 6073 conditions per place. [2024-06-04 15:14:05,425 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 79 changer transitions 0/543 dead transitions. [2024-06-04 15:14:05,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 543 transitions, 7012 flow [2024-06-04 15:14:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:14:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-04 15:14:05,426 INFO L175 Difference]: Start difference. First operand has 400 places, 521 transitions, 5502 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:14:05,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 543 transitions, 7012 flow [2024-06-04 15:14:10,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 543 transitions, 6891 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:10,873 INFO L231 Difference]: Finished difference. Result has 402 places, 524 transitions, 5611 flow [2024-06-04 15:14:10,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5611, PETRI_PLACES=402, PETRI_TRANSITIONS=524} [2024-06-04 15:14:10,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-04 15:14:10,879 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 524 transitions, 5611 flow [2024-06-04 15:14:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:10,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:10,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:10,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:14:10,879 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:10,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1034113476, now seen corresponding path program 3 times [2024-06-04 15:14:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:10,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315360603] [2024-06-04 15:14:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:10,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315360603] [2024-06-04 15:14:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315360603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500744894] [2024-06-04 15:14:11,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:14:11,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 524 transitions, 5611 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:11,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:11,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:14:11,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:13,613 INFO L124 PetriNetUnfolderBase]: 4101/6484 cut-off events. [2024-06-04 15:14:13,613 INFO L125 PetriNetUnfolderBase]: For 1708426/1708426 co-relation queries the response was YES. [2024-06-04 15:14:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66002 conditions, 6484 events. 4101/6484 cut-off events. For 1708426/1708426 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 39469 event pairs, 822 based on Foata normal form. 4/6487 useless extension candidates. Maximal degree in co-relation 65812. Up to 6089 conditions per place. [2024-06-04 15:14:13,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 457 selfloop transitions, 85 changer transitions 0/546 dead transitions. [2024-06-04 15:14:13,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 546 transitions, 7135 flow [2024-06-04 15:14:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:14:13,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:14:13,755 INFO L175 Difference]: Start difference. First operand has 402 places, 524 transitions, 5611 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:14:13,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 546 transitions, 7135 flow [2024-06-04 15:14:19,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 546 transitions, 6880 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:19,632 INFO L231 Difference]: Finished difference. Result has 404 places, 527 transitions, 5604 flow [2024-06-04 15:14:19,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5604, PETRI_PLACES=404, PETRI_TRANSITIONS=527} [2024-06-04 15:14:19,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-04 15:14:19,633 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 527 transitions, 5604 flow [2024-06-04 15:14:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:19,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:19,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:19,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:14:19,634 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:19,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash -553922732, now seen corresponding path program 4 times [2024-06-04 15:14:19,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:19,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033828693] [2024-06-04 15:14:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:19,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033828693] [2024-06-04 15:14:20,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033828693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:20,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574158117] [2024-06-04 15:14:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:20,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:14:20,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 527 transitions, 5604 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:20,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:14:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:22,900 INFO L124 PetriNetUnfolderBase]: 4121/6512 cut-off events. [2024-06-04 15:14:22,901 INFO L125 PetriNetUnfolderBase]: For 1732104/1732104 co-relation queries the response was YES. [2024-06-04 15:14:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66299 conditions, 6512 events. 4121/6512 cut-off events. For 1732104/1732104 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39652 event pairs, 820 based on Foata normal form. 4/6515 useless extension candidates. Maximal degree in co-relation 66108. Up to 6105 conditions per place. [2024-06-04 15:14:23,019 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 92 changer transitions 0/548 dead transitions. [2024-06-04 15:14:23,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 548 transitions, 7114 flow [2024-06-04 15:14:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:14:23,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-04 15:14:23,020 INFO L175 Difference]: Start difference. First operand has 404 places, 527 transitions, 5604 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:14:23,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 548 transitions, 7114 flow [2024-06-04 15:14:28,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 548 transitions, 6859 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:28,454 INFO L231 Difference]: Finished difference. Result has 406 places, 530 transitions, 5607 flow [2024-06-04 15:14:28,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5607, PETRI_PLACES=406, PETRI_TRANSITIONS=530} [2024-06-04 15:14:28,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-04 15:14:28,455 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 530 transitions, 5607 flow [2024-06-04 15:14:28,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:28,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:28,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:28,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:14:28,456 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:28,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -583777062, now seen corresponding path program 5 times [2024-06-04 15:14:28,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:28,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197098781] [2024-06-04 15:14:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:29,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197098781] [2024-06-04 15:14:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197098781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:29,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:29,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:29,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370013744] [2024-06-04 15:14:29,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:29,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:29,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:29,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:14:29,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 530 transitions, 5607 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:29,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:29,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:14:29,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:31,495 INFO L124 PetriNetUnfolderBase]: 4109/6496 cut-off events. [2024-06-04 15:14:31,496 INFO L125 PetriNetUnfolderBase]: For 1720070/1720070 co-relation queries the response was YES. [2024-06-04 15:14:31,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65646 conditions, 6496 events. 4109/6496 cut-off events. For 1720070/1720070 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39590 event pairs, 922 based on Foata normal form. 4/6499 useless extension candidates. Maximal degree in co-relation 65454. Up to 6306 conditions per place. [2024-06-04 15:14:31,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 516 selfloop transitions, 23 changer transitions 0/543 dead transitions. [2024-06-04 15:14:31,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 543 transitions, 6735 flow [2024-06-04 15:14:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:14:31,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-04 15:14:31,603 INFO L175 Difference]: Start difference. First operand has 406 places, 530 transitions, 5607 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:14:31,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 543 transitions, 6735 flow [2024-06-04 15:14:35,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 543 transitions, 6433 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-04 15:14:35,980 INFO L231 Difference]: Finished difference. Result has 407 places, 530 transitions, 5358 flow [2024-06-04 15:14:35,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=407, PETRI_TRANSITIONS=530} [2024-06-04 15:14:35,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-04 15:14:35,981 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 530 transitions, 5358 flow [2024-06-04 15:14:35,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:35,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:35,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:14:35,981 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:35,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1150512890, now seen corresponding path program 1 times [2024-06-04 15:14:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133451068] [2024-06-04 15:14:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:37,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:37,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133451068] [2024-06-04 15:14:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133451068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:37,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:37,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474198258] [2024-06-04 15:14:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:37,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:37,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:37,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 530 transitions, 5358 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:37,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:37,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:37,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:38,830 INFO L124 PetriNetUnfolderBase]: 3862/6240 cut-off events. [2024-06-04 15:14:38,830 INFO L125 PetriNetUnfolderBase]: For 1506160/1506160 co-relation queries the response was YES. [2024-06-04 15:14:38,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60192 conditions, 6240 events. 3862/6240 cut-off events. For 1506160/1506160 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 39329 event pairs, 793 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 60000. Up to 5793 conditions per place. [2024-06-04 15:14:38,933 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 493 selfloop transitions, 29 changer transitions 0/561 dead transitions. [2024-06-04 15:14:38,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 561 transitions, 6886 flow [2024-06-04 15:14:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:14:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:14:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:14:38,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:14:38,935 INFO L175 Difference]: Start difference. First operand has 407 places, 530 transitions, 5358 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:14:38,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 561 transitions, 6886 flow [2024-06-04 15:14:46,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 561 transitions, 6688 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-04 15:14:46,095 INFO L231 Difference]: Finished difference. Result has 404 places, 534 transitions, 5359 flow [2024-06-04 15:14:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5359, PETRI_PLACES=404, PETRI_TRANSITIONS=534} [2024-06-04 15:14:46,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-04 15:14:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 534 transitions, 5359 flow [2024-06-04 15:14:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:46,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:46,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:14:46,097 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:46,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 650652956, now seen corresponding path program 1 times [2024-06-04 15:14:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255872265] [2024-06-04 15:14:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255872265] [2024-06-04 15:14:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255872265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:47,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:47,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943715561] [2024-06-04 15:14:47,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:47,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:47,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 534 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:47,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:47,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:47,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:48,856 INFO L124 PetriNetUnfolderBase]: 3970/6356 cut-off events. [2024-06-04 15:14:48,857 INFO L125 PetriNetUnfolderBase]: For 1520787/1520787 co-relation queries the response was YES. [2024-06-04 15:14:48,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60794 conditions, 6356 events. 3970/6356 cut-off events. For 1520787/1520787 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 39575 event pairs, 855 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 60604. Up to 6071 conditions per place. [2024-06-04 15:14:48,967 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 521 selfloop transitions, 31 changer transitions 0/562 dead transitions. [2024-06-04 15:14:48,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 562 transitions, 6949 flow [2024-06-04 15:14:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:14:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:14:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 15:14:48,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 15:14:48,968 INFO L175 Difference]: Start difference. First operand has 404 places, 534 transitions, 5359 flow. Second operand 10 states and 175 transitions. [2024-06-04 15:14:48,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 562 transitions, 6949 flow [2024-06-04 15:14:54,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 562 transitions, 6830 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:54,475 INFO L231 Difference]: Finished difference. Result has 408 places, 540 transitions, 5462 flow [2024-06-04 15:14:54,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5462, PETRI_PLACES=408, PETRI_TRANSITIONS=540} [2024-06-04 15:14:54,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-04 15:14:54,476 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 540 transitions, 5462 flow [2024-06-04 15:14:54,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:54,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:54,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:14:54,477 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 650652832, now seen corresponding path program 2 times [2024-06-04 15:14:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57074603] [2024-06-04 15:14:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:54,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57074603] [2024-06-04 15:14:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57074603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:55,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105012853] [2024-06-04 15:14:55,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:55,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:55,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 540 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:55,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:55,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:55,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:57,483 INFO L124 PetriNetUnfolderBase]: 3898/6288 cut-off events. [2024-06-04 15:14:57,483 INFO L125 PetriNetUnfolderBase]: For 1560092/1560092 co-relation queries the response was YES. [2024-06-04 15:14:57,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60960 conditions, 6288 events. 3898/6288 cut-off events. For 1560092/1560092 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39598 event pairs, 833 based on Foata normal form. 2/6278 useless extension candidates. Maximal degree in co-relation 60768. Up to 5864 conditions per place. [2024-06-04 15:14:57,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 497 selfloop transitions, 26 changer transitions 0/564 dead transitions. [2024-06-04 15:14:57,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 564 transitions, 6620 flow [2024-06-04 15:14:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:14:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:14:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 15:14:57,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-04 15:14:57,611 INFO L175 Difference]: Start difference. First operand has 408 places, 540 transitions, 5462 flow. Second operand 10 states and 181 transitions. [2024-06-04 15:14:57,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 564 transitions, 6620 flow [2024-06-04 15:15:04,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 564 transitions, 6507 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:04,249 INFO L231 Difference]: Finished difference. Result has 412 places, 542 transitions, 5452 flow [2024-06-04 15:15:04,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5452, PETRI_PLACES=412, PETRI_TRANSITIONS=542} [2024-06-04 15:15:04,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-04 15:15:04,250 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 542 transitions, 5452 flow [2024-06-04 15:15:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:04,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:04,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:15:04,250 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:04,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 653449466, now seen corresponding path program 2 times [2024-06-04 15:15:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043049673] [2024-06-04 15:15:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043049673] [2024-06-04 15:15:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043049673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:05,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773804073] [2024-06-04 15:15:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:05,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:05,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 542 transitions, 5452 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:05,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:05,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:05,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:07,141 INFO L124 PetriNetUnfolderBase]: 3983/6375 cut-off events. [2024-06-04 15:15:07,142 INFO L125 PetriNetUnfolderBase]: For 1568549/1568549 co-relation queries the response was YES. [2024-06-04 15:15:07,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61573 conditions, 6375 events. 3983/6375 cut-off events. For 1568549/1568549 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39698 event pairs, 855 based on Foata normal form. 1/6364 useless extension candidates. Maximal degree in co-relation 61379. Up to 6104 conditions per place. [2024-06-04 15:15:07,277 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 527 selfloop transitions, 26 changer transitions 0/563 dead transitions. [2024-06-04 15:15:07,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 563 transitions, 6946 flow [2024-06-04 15:15:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:15:07,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:15:07,278 INFO L175 Difference]: Start difference. First operand has 412 places, 542 transitions, 5452 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:15:07,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 563 transitions, 6946 flow [2024-06-04 15:15:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 563 transitions, 6863 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:15:13,866 INFO L231 Difference]: Finished difference. Result has 413 places, 545 transitions, 5487 flow [2024-06-04 15:15:13,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5487, PETRI_PLACES=413, PETRI_TRANSITIONS=545} [2024-06-04 15:15:13,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-04 15:15:13,866 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 545 transitions, 5487 flow [2024-06-04 15:15:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:13,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:13,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:13,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:15:13,867 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:13,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1600549844, now seen corresponding path program 3 times [2024-06-04 15:15:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:13,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170671801] [2024-06-04 15:15:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:14,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170671801] [2024-06-04 15:15:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170671801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720774948] [2024-06-04 15:15:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:14,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:15:15,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 545 transitions, 5487 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:15,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:15:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:16,793 INFO L124 PetriNetUnfolderBase]: 3898/6288 cut-off events. [2024-06-04 15:15:16,794 INFO L125 PetriNetUnfolderBase]: For 1584521/1584521 co-relation queries the response was YES. [2024-06-04 15:15:16,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60935 conditions, 6288 events. 3898/6288 cut-off events. For 1584521/1584521 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39585 event pairs, 832 based on Foata normal form. 2/6278 useless extension candidates. Maximal degree in co-relation 60740. Up to 5874 conditions per place. [2024-06-04 15:15:16,906 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 501 selfloop transitions, 20 changer transitions 0/563 dead transitions. [2024-06-04 15:15:16,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 563 transitions, 6585 flow [2024-06-04 15:15:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:15:16,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:15:16,908 INFO L175 Difference]: Start difference. First operand has 413 places, 545 transitions, 5487 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:15:16,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 563 transitions, 6585 flow [2024-06-04 15:15:23,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 563 transitions, 6447 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:23,373 INFO L231 Difference]: Finished difference. Result has 415 places, 545 transitions, 5394 flow [2024-06-04 15:15:23,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5394, PETRI_PLACES=415, PETRI_TRANSITIONS=545} [2024-06-04 15:15:23,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-04 15:15:23,374 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 545 transitions, 5394 flow [2024-06-04 15:15:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:23,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:23,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:23,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:15:23,374 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:23,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:23,375 INFO L85 PathProgramCache]: Analyzing trace with hash 653454116, now seen corresponding path program 3 times [2024-06-04 15:15:23,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:23,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162792761] [2024-06-04 15:15:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:23,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:24,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:24,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162792761] [2024-06-04 15:15:24,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162792761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:24,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:24,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:24,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663264642] [2024-06-04 15:15:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:24,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:24,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:24,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 545 transitions, 5394 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:24,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:24,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:24,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:26,305 INFO L124 PetriNetUnfolderBase]: 3975/6364 cut-off events. [2024-06-04 15:15:26,305 INFO L125 PetriNetUnfolderBase]: For 1582393/1582393 co-relation queries the response was YES. [2024-06-04 15:15:26,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61199 conditions, 6364 events. 3975/6364 cut-off events. For 1582393/1582393 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39617 event pairs, 854 based on Foata normal form. 1/6353 useless extension candidates. Maximal degree in co-relation 61003. Up to 6100 conditions per place. [2024-06-04 15:15:26,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 531 selfloop transitions, 21 changer transitions 0/562 dead transitions. [2024-06-04 15:15:26,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 562 transitions, 6552 flow [2024-06-04 15:15:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:15:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-04 15:15:26,413 INFO L175 Difference]: Start difference. First operand has 415 places, 545 transitions, 5394 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:15:26,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 562 transitions, 6552 flow [2024-06-04 15:15:33,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 562 transitions, 6462 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 15:15:33,549 INFO L231 Difference]: Finished difference. Result has 416 places, 545 transitions, 5352 flow [2024-06-04 15:15:33,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5352, PETRI_PLACES=416, PETRI_TRANSITIONS=545} [2024-06-04 15:15:33,550 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-04 15:15:33,550 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 545 transitions, 5352 flow [2024-06-04 15:15:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:33,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:33,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:33,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:15:33,551 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:33,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1600554804, now seen corresponding path program 1 times [2024-06-04 15:15:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:33,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465346506] [2024-06-04 15:15:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465346506] [2024-06-04 15:15:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465346506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:34,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:34,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181725924] [2024-06-04 15:15:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:34,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 545 transitions, 5352 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:34,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:34,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:34,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:36,413 INFO L124 PetriNetUnfolderBase]: 3985/6380 cut-off events. [2024-06-04 15:15:36,414 INFO L125 PetriNetUnfolderBase]: For 1614169/1614169 co-relation queries the response was YES. [2024-06-04 15:15:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61487 conditions, 6380 events. 3985/6380 cut-off events. For 1614169/1614169 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39794 event pairs, 853 based on Foata normal form. 2/6370 useless extension candidates. Maximal degree in co-relation 61290. Up to 6111 conditions per place. [2024-06-04 15:15:36,528 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 535 selfloop transitions, 21 changer transitions 0/566 dead transitions. [2024-06-04 15:15:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 566 transitions, 6606 flow [2024-06-04 15:15:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:15:36,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-04 15:15:36,529 INFO L175 Difference]: Start difference. First operand has 416 places, 545 transitions, 5352 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:15:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 566 transitions, 6606 flow [2024-06-04 15:15:44,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 566 transitions, 6554 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:15:44,644 INFO L231 Difference]: Finished difference. Result has 417 places, 548 transitions, 5438 flow [2024-06-04 15:15:44,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5438, PETRI_PLACES=417, PETRI_TRANSITIONS=548} [2024-06-04 15:15:44,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-04 15:15:44,645 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 548 transitions, 5438 flow [2024-06-04 15:15:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:44,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:44,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:44,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:15:44,646 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:44,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1092989932, now seen corresponding path program 4 times [2024-06-04 15:15:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42969552] [2024-06-04 15:15:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42969552] [2024-06-04 15:15:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42969552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:45,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:45,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750639629] [2024-06-04 15:15:45,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:45,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:45,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:45,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:45,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 548 transitions, 5438 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:45,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:45,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:47,452 INFO L124 PetriNetUnfolderBase]: 3998/6398 cut-off events. [2024-06-04 15:15:47,452 INFO L125 PetriNetUnfolderBase]: For 1635383/1635383 co-relation queries the response was YES. [2024-06-04 15:15:47,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62258 conditions, 6398 events. 3998/6398 cut-off events. For 1635383/1635383 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39889 event pairs, 855 based on Foata normal form. 1/6387 useless extension candidates. Maximal degree in co-relation 62060. Up to 6081 conditions per place. [2024-06-04 15:15:47,566 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 501 selfloop transitions, 58 changer transitions 0/569 dead transitions. [2024-06-04 15:15:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 569 transitions, 7044 flow [2024-06-04 15:15:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:15:47,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-04 15:15:47,568 INFO L175 Difference]: Start difference. First operand has 417 places, 548 transitions, 5438 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:15:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 569 transitions, 7044 flow [2024-06-04 15:15:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 569 transitions, 6928 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:55,935 INFO L231 Difference]: Finished difference. Result has 419 places, 554 transitions, 5614 flow [2024-06-04 15:15:55,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5614, PETRI_PLACES=419, PETRI_TRANSITIONS=554} [2024-06-04 15:15:55,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-04 15:15:55,936 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 554 transitions, 5614 flow [2024-06-04 15:15:55,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:55,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:55,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:15:55,937 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:55,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1092990056, now seen corresponding path program 4 times [2024-06-04 15:15:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301975319] [2024-06-04 15:15:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301975319] [2024-06-04 15:15:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301975319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:57,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:57,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124177229] [2024-06-04 15:15:57,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:57,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:57,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:15:57,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 554 transitions, 5614 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:57,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:57,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:15:57,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:58,913 INFO L124 PetriNetUnfolderBase]: 3925/6329 cut-off events. [2024-06-04 15:15:58,914 INFO L125 PetriNetUnfolderBase]: For 1676529/1676529 co-relation queries the response was YES. [2024-06-04 15:15:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62544 conditions, 6329 events. 3925/6329 cut-off events. For 1676529/1676529 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39847 event pairs, 832 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 62345. Up to 5894 conditions per place. [2024-06-04 15:15:59,015 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 495 selfloop transitions, 32 changer transitions 0/571 dead transitions. [2024-06-04 15:15:59,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 571 transitions, 6788 flow [2024-06-04 15:15:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:15:59,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-04 15:15:59,016 INFO L175 Difference]: Start difference. First operand has 419 places, 554 transitions, 5614 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:15:59,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 571 transitions, 6788 flow [2024-06-04 15:16:07,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 571 transitions, 6619 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:07,699 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 5594 flow [2024-06-04 15:16:07,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5594, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-04 15:16:07,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-04 15:16:07,699 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 5594 flow [2024-06-04 15:16:07,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:07,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:07,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:16:07,700 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:07,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1092985096, now seen corresponding path program 2 times [2024-06-04 15:16:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:07,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166980880] [2024-06-04 15:16:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166980880] [2024-06-04 15:16:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166980880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:08,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:08,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314528175] [2024-06-04 15:16:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:08,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:08,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:08,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 5594 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:08,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:08,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:08,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:10,472 INFO L124 PetriNetUnfolderBase]: 4067/6501 cut-off events. [2024-06-04 15:16:10,472 INFO L125 PetriNetUnfolderBase]: For 1739807/1739807 co-relation queries the response was YES. [2024-06-04 15:16:10,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64864 conditions, 6501 events. 4067/6501 cut-off events. For 1739807/1739807 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40534 event pairs, 863 based on Foata normal form. 2/6491 useless extension candidates. Maximal degree in co-relation 64663. Up to 6106 conditions per place. [2024-06-04 15:16:10,587 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 67 changer transitions 0/585 dead transitions. [2024-06-04 15:16:10,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 585 transitions, 7656 flow [2024-06-04 15:16:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:16:10,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:16:10,588 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 5594 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:16:10,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 585 transitions, 7656 flow [2024-06-04 15:16:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 585 transitions, 7523 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 15:16:18,341 INFO L231 Difference]: Finished difference. Result has 425 places, 565 transitions, 5889 flow [2024-06-04 15:16:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5889, PETRI_PLACES=425, PETRI_TRANSITIONS=565} [2024-06-04 15:16:18,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-04 15:16:18,341 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 565 transitions, 5889 flow [2024-06-04 15:16:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:16:18,342 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 768745286, now seen corresponding path program 5 times [2024-06-04 15:16:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940867102] [2024-06-04 15:16:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940867102] [2024-06-04 15:16:19,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940867102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:19,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:19,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265103047] [2024-06-04 15:16:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:19,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:19,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:19,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 565 transitions, 5889 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:19,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:19,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:21,291 INFO L124 PetriNetUnfolderBase]: 4040/6461 cut-off events. [2024-06-04 15:16:21,291 INFO L125 PetriNetUnfolderBase]: For 1741617/1741617 co-relation queries the response was YES. [2024-06-04 15:16:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64676 conditions, 6461 events. 4040/6461 cut-off events. For 1741617/1741617 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40296 event pairs, 859 based on Foata normal form. 1/6448 useless extension candidates. Maximal degree in co-relation 64474. Up to 6151 conditions per place. [2024-06-04 15:16:21,418 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 519 selfloop transitions, 53 changer transitions 0/582 dead transitions. [2024-06-04 15:16:21,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 582 transitions, 7127 flow [2024-06-04 15:16:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:16:21,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-04 15:16:21,419 INFO L175 Difference]: Start difference. First operand has 425 places, 565 transitions, 5889 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:16:21,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 582 transitions, 7127 flow [2024-06-04 15:16:30,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 6986 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-04 15:16:30,693 INFO L231 Difference]: Finished difference. Result has 430 places, 568 transitions, 5918 flow [2024-06-04 15:16:30,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5918, PETRI_PLACES=430, PETRI_TRANSITIONS=568} [2024-06-04 15:16:30,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-04 15:16:30,693 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 568 transitions, 5918 flow [2024-06-04 15:16:30,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:30,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:30,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:16:30,694 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:30,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 768924962, now seen corresponding path program 3 times [2024-06-04 15:16:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234780611] [2024-06-04 15:16:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:31,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234780611] [2024-06-04 15:16:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234780611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:31,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:31,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927470144] [2024-06-04 15:16:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:31,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:31,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 568 transitions, 5918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:31,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:31,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:31,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:33,584 INFO L124 PetriNetUnfolderBase]: 4055/6482 cut-off events. [2024-06-04 15:16:33,584 INFO L125 PetriNetUnfolderBase]: For 1774122/1774122 co-relation queries the response was YES. [2024-06-04 15:16:33,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64956 conditions, 6482 events. 4055/6482 cut-off events. For 1774122/1774122 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40403 event pairs, 858 based on Foata normal form. 2/6472 useless extension candidates. Maximal degree in co-relation 64752. Up to 6087 conditions per place. [2024-06-04 15:16:33,711 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 73 changer transitions 0/590 dead transitions. [2024-06-04 15:16:33,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 590 transitions, 7796 flow [2024-06-04 15:16:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:16:33,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-04 15:16:33,712 INFO L175 Difference]: Start difference. First operand has 430 places, 568 transitions, 5918 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:16:33,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 590 transitions, 7796 flow [2024-06-04 15:16:42,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 590 transitions, 7654 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 15:16:42,846 INFO L231 Difference]: Finished difference. Result has 432 places, 571 transitions, 6012 flow [2024-06-04 15:16:42,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6012, PETRI_PLACES=432, PETRI_TRANSITIONS=571} [2024-06-04 15:16:42,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-04 15:16:42,846 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 571 transitions, 6012 flow [2024-06-04 15:16:42,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:42,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:42,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:42,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:16:42,847 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:42,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1092812302, now seen corresponding path program 6 times [2024-06-04 15:16:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876252056] [2024-06-04 15:16:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876252056] [2024-06-04 15:16:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876252056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:43,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:43,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134890207] [2024-06-04 15:16:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:44,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:44,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 571 transitions, 6012 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:44,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:44,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:44,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:45,737 INFO L124 PetriNetUnfolderBase]: 4052/6480 cut-off events. [2024-06-04 15:16:45,737 INFO L125 PetriNetUnfolderBase]: For 1776631/1776631 co-relation queries the response was YES. [2024-06-04 15:16:45,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64994 conditions, 6480 events. 4052/6480 cut-off events. For 1776631/1776631 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40419 event pairs, 857 based on Foata normal form. 1/6467 useless extension candidates. Maximal degree in co-relation 64789. Up to 6166 conditions per place. [2024-06-04 15:16:45,859 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 521 selfloop transitions, 54 changer transitions 0/585 dead transitions. [2024-06-04 15:16:45,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 585 transitions, 7204 flow [2024-06-04 15:16:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:16:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-04 15:16:45,861 INFO L175 Difference]: Start difference. First operand has 432 places, 571 transitions, 6012 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:16:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 585 transitions, 7204 flow [2024-06-04 15:16:55,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 585 transitions, 6988 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:55,106 INFO L231 Difference]: Finished difference. Result has 436 places, 571 transitions, 5910 flow [2024-06-04 15:16:55,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=436, PETRI_TRANSITIONS=571} [2024-06-04 15:16:55,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-04 15:16:55,106 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 571 transitions, 5910 flow [2024-06-04 15:16:55,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:55,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:55,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:55,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 15:16:55,107 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:55,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1092812116, now seen corresponding path program 4 times [2024-06-04 15:16:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805520009] [2024-06-04 15:16:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805520009] [2024-06-04 15:16:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805520009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:56,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:56,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322083053] [2024-06-04 15:16:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:56,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:56,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:56,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 571 transitions, 5910 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:56,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:56,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:56,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:58,032 INFO L124 PetriNetUnfolderBase]: 4046/6470 cut-off events. [2024-06-04 15:16:58,032 INFO L125 PetriNetUnfolderBase]: For 1787323/1787323 co-relation queries the response was YES. [2024-06-04 15:16:58,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64519 conditions, 6470 events. 4046/6470 cut-off events. For 1787323/1787323 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40390 event pairs, 857 based on Foata normal form. 2/6460 useless extension candidates. Maximal degree in co-relation 64313. Up to 6078 conditions per place. [2024-06-04 15:16:58,134 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 509 selfloop transitions, 71 changer transitions 0/590 dead transitions. [2024-06-04 15:16:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 590 transitions, 7422 flow [2024-06-04 15:16:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:16:58,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:16:58,135 INFO L175 Difference]: Start difference. First operand has 436 places, 571 transitions, 5910 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:16:58,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 590 transitions, 7422 flow [2024-06-04 15:17:09,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 590 transitions, 7236 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:09,384 INFO L231 Difference]: Finished difference. Result has 437 places, 571 transitions, 5872 flow [2024-06-04 15:17:09,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5872, PETRI_PLACES=437, PETRI_TRANSITIONS=571} [2024-06-04 15:17:09,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-04 15:17:09,385 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 571 transitions, 5872 flow [2024-06-04 15:17:09,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:09,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:09,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:09,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 15:17:09,386 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:09,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1385512860, now seen corresponding path program 7 times [2024-06-04 15:17:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:09,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065707436] [2024-06-04 15:17:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:09,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:10,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:10,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065707436] [2024-06-04 15:17:10,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065707436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:10,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:10,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958185803] [2024-06-04 15:17:10,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:10,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:10,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:10,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 571 transitions, 5872 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:10,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:10,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:12,295 INFO L124 PetriNetUnfolderBase]: 4078/6520 cut-off events. [2024-06-04 15:17:12,295 INFO L125 PetriNetUnfolderBase]: For 1812847/1812847 co-relation queries the response was YES. [2024-06-04 15:17:12,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65346 conditions, 6520 events. 4078/6520 cut-off events. For 1812847/1812847 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 40651 event pairs, 862 based on Foata normal form. 1/6507 useless extension candidates. Maximal degree in co-relation 65139. Up to 6245 conditions per place. [2024-06-04 15:17:12,411 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 34 changer transitions 0/585 dead transitions. [2024-06-04 15:17:12,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 585 transitions, 7144 flow [2024-06-04 15:17:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:17:12,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-04 15:17:12,412 INFO L175 Difference]: Start difference. First operand has 437 places, 571 transitions, 5872 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:17:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 585 transitions, 7144 flow [2024-06-04 15:17:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 585 transitions, 6976 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 15:17:21,740 INFO L231 Difference]: Finished difference. Result has 437 places, 574 transitions, 5876 flow [2024-06-04 15:17:21,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5876, PETRI_PLACES=437, PETRI_TRANSITIONS=574} [2024-06-04 15:17:21,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-04 15:17:21,740 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 574 transitions, 5876 flow [2024-06-04 15:17:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:21,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:21,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 15:17:21,741 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:21,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash 940820206, now seen corresponding path program 5 times [2024-06-04 15:17:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:21,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127738420] [2024-06-04 15:17:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127738420] [2024-06-04 15:17:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127738420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:22,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:22,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517661810] [2024-06-04 15:17:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:22,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:22,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 574 transitions, 5876 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:22,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:22,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:22,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:24,713 INFO L124 PetriNetUnfolderBase]: 4117/6579 cut-off events. [2024-06-04 15:17:24,714 INFO L125 PetriNetUnfolderBase]: For 1898002/1898002 co-relation queries the response was YES. [2024-06-04 15:17:24,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67232 conditions, 6579 events. 4117/6579 cut-off events. For 1898002/1898002 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41080 event pairs, 864 based on Foata normal form. 2/6567 useless extension candidates. Maximal degree in co-relation 67024. Up to 6268 conditions per place. [2024-06-04 15:17:24,817 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 554 selfloop transitions, 35 changer transitions 0/599 dead transitions. [2024-06-04 15:17:24,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 599 transitions, 7995 flow [2024-06-04 15:17:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:17:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:17:24,818 INFO L175 Difference]: Start difference. First operand has 437 places, 574 transitions, 5876 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:17:24,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 599 transitions, 7995 flow [2024-06-04 15:17:33,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 599 transitions, 7845 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:33,782 INFO L231 Difference]: Finished difference. Result has 439 places, 583 transitions, 6111 flow [2024-06-04 15:17:33,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6111, PETRI_PLACES=439, PETRI_TRANSITIONS=583} [2024-06-04 15:17:33,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-04 15:17:33,782 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 583 transitions, 6111 flow [2024-06-04 15:17:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:33,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:33,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 15:17:33,783 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:33,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash -806555648, now seen corresponding path program 6 times [2024-06-04 15:17:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175769474] [2024-06-04 15:17:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:34,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175769474] [2024-06-04 15:17:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175769474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:34,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027502168] [2024-06-04 15:17:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:34,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:34,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 583 transitions, 6111 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:34,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:34,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:36,550 INFO L124 PetriNetUnfolderBase]: 4098/6548 cut-off events. [2024-06-04 15:17:36,550 INFO L125 PetriNetUnfolderBase]: For 1910222/1910222 co-relation queries the response was YES. [2024-06-04 15:17:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66951 conditions, 6548 events. 4098/6548 cut-off events. For 1910222/1910222 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40914 event pairs, 857 based on Foata normal form. 2/6536 useless extension candidates. Maximal degree in co-relation 66742. Up to 6204 conditions per place. [2024-06-04 15:17:36,669 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 55 changer transitions 0/601 dead transitions. [2024-06-04 15:17:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 601 transitions, 7742 flow [2024-06-04 15:17:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:17:36,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-04 15:17:36,670 INFO L175 Difference]: Start difference. First operand has 439 places, 583 transitions, 6111 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:17:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 601 transitions, 7742 flow [2024-06-04 15:17:45,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 601 transitions, 7601 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-04 15:17:45,036 INFO L231 Difference]: Finished difference. Result has 444 places, 586 transitions, 6193 flow [2024-06-04 15:17:45,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6193, PETRI_PLACES=444, PETRI_TRANSITIONS=586} [2024-06-04 15:17:45,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-04 15:17:45,036 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 586 transitions, 6193 flow [2024-06-04 15:17:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:45,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:45,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:45,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 15:17:45,037 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:45,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash -570200798, now seen corresponding path program 7 times [2024-06-04 15:17:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310495997] [2024-06-04 15:17:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:45,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:45,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310495997] [2024-06-04 15:17:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310495997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:45,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:45,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128160586] [2024-06-04 15:17:45,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:46,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:46,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 586 transitions, 6193 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:46,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:46,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:46,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:48,113 INFO L124 PetriNetUnfolderBase]: 4100/6550 cut-off events. [2024-06-04 15:17:48,113 INFO L125 PetriNetUnfolderBase]: For 1920368/1920368 co-relation queries the response was YES. [2024-06-04 15:17:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 6550 events. 4100/6550 cut-off events. For 1920368/1920368 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40923 event pairs, 859 based on Foata normal form. 3/6539 useless extension candidates. Maximal degree in co-relation 66506. Up to 6274 conditions per place. [2024-06-04 15:17:48,219 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 566 selfloop transitions, 23 changer transitions 0/599 dead transitions. [2024-06-04 15:17:48,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 599 transitions, 7409 flow [2024-06-04 15:17:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:17:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-04 15:17:48,221 INFO L175 Difference]: Start difference. First operand has 444 places, 586 transitions, 6193 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:17:48,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 599 transitions, 7409 flow [2024-06-04 15:17:57,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 599 transitions, 7068 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:57,387 INFO L231 Difference]: Finished difference. Result has 445 places, 586 transitions, 5904 flow [2024-06-04 15:17:57,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5904, PETRI_PLACES=445, PETRI_TRANSITIONS=586} [2024-06-04 15:17:57,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-04 15:17:57,388 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 586 transitions, 5904 flow [2024-06-04 15:17:57,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:57,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:57,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:57,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 15:17:57,388 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:57,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1028400362, now seen corresponding path program 8 times [2024-06-04 15:17:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:57,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160796669] [2024-06-04 15:17:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:57,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:58,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160796669] [2024-06-04 15:17:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160796669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:58,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180679356] [2024-06-04 15:17:58,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:58,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:58,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:58,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 586 transitions, 5904 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:58,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:58,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:58,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:00,347 INFO L124 PetriNetUnfolderBase]: 4094/6540 cut-off events. [2024-06-04 15:18:00,348 INFO L125 PetriNetUnfolderBase]: For 1904596/1904596 co-relation queries the response was YES. [2024-06-04 15:18:00,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65990 conditions, 6540 events. 4094/6540 cut-off events. For 1904596/1904596 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40854 event pairs, 858 based on Foata normal form. 2/6528 useless extension candidates. Maximal degree in co-relation 65778. Up to 6240 conditions per place. [2024-06-04 15:18:00,455 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 554 selfloop transitions, 36 changer transitions 0/600 dead transitions. [2024-06-04 15:18:00,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 600 transitions, 7126 flow [2024-06-04 15:18:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:18:00,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-04 15:18:00,456 INFO L175 Difference]: Start difference. First operand has 445 places, 586 transitions, 5904 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:18:00,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 600 transitions, 7126 flow [2024-06-04 15:18:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 600 transitions, 7005 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:11,024 INFO L231 Difference]: Finished difference. Result has 446 places, 586 transitions, 5861 flow [2024-06-04 15:18:11,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=446, PETRI_TRANSITIONS=586} [2024-06-04 15:18:11,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-04 15:18:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 586 transitions, 5861 flow [2024-06-04 15:18:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:11,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:11,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:11,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 15:18:11,026 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:11,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash -806560608, now seen corresponding path program 5 times [2024-06-04 15:18:11,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:11,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142202027] [2024-06-04 15:18:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:11,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142202027] [2024-06-04 15:18:12,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142202027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:12,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:12,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304001574] [2024-06-04 15:18:12,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:12,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:12,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:12,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:18:12,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 586 transitions, 5861 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:12,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:12,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:18:12,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:14,999 INFO L124 PetriNetUnfolderBase]: 4005/6451 cut-off events. [2024-06-04 15:18:14,999 INFO L125 PetriNetUnfolderBase]: For 1908250/1908250 co-relation queries the response was YES. [2024-06-04 15:18:15,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65250 conditions, 6451 events. 4005/6451 cut-off events. For 1908250/1908250 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40746 event pairs, 837 based on Foata normal form. 2/6439 useless extension candidates. Maximal degree in co-relation 65037. Up to 6032 conditions per place. [2024-06-04 15:18:15,117 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 534 selfloop transitions, 20 changer transitions 0/600 dead transitions. [2024-06-04 15:18:15,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 600 transitions, 7085 flow [2024-06-04 15:18:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:18:15,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-04 15:18:15,119 INFO L175 Difference]: Start difference. First operand has 446 places, 586 transitions, 5861 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:18:15,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 600 transitions, 7085 flow [2024-06-04 15:18:26,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 7009 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:26,056 INFO L231 Difference]: Finished difference. Result has 447 places, 588 transitions, 5918 flow [2024-06-04 15:18:26,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5918, PETRI_PLACES=447, PETRI_TRANSITIONS=588} [2024-06-04 15:18:26,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-04 15:18:26,057 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 588 transitions, 5918 flow [2024-06-04 15:18:26,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:26,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:26,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:26,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 15:18:26,057 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:26,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash -578481704, now seen corresponding path program 8 times [2024-06-04 15:18:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:26,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751066423] [2024-06-04 15:18:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:26,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:27,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:27,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751066423] [2024-06-04 15:18:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751066423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:27,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:27,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898591893] [2024-06-04 15:18:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:27,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:27,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:27,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 588 transitions, 5918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:27,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:27,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:27,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:30,071 INFO L124 PetriNetUnfolderBase]: 4094/6540 cut-off events. [2024-06-04 15:18:30,071 INFO L125 PetriNetUnfolderBase]: For 1915999/1915999 co-relation queries the response was YES. [2024-06-04 15:18:30,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65998 conditions, 6540 events. 4094/6540 cut-off events. For 1915999/1915999 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40830 event pairs, 861 based on Foata normal form. 1/6527 useless extension candidates. Maximal degree in co-relation 65784. Up to 6280 conditions per place. [2024-06-04 15:18:30,190 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 571 selfloop transitions, 21 changer transitions 0/602 dead transitions. [2024-06-04 15:18:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 602 transitions, 7232 flow [2024-06-04 15:18:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:18:30,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-04 15:18:30,191 INFO L175 Difference]: Start difference. First operand has 447 places, 588 transitions, 5918 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:18:30,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 602 transitions, 7232 flow [2024-06-04 15:18:40,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 7115 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:40,199 INFO L231 Difference]: Finished difference. Result has 449 places, 591 transitions, 5955 flow [2024-06-04 15:18:40,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=449, PETRI_TRANSITIONS=591} [2024-06-04 15:18:40,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-04 15:18:40,199 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 591 transitions, 5955 flow [2024-06-04 15:18:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:40,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:40,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:40,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 15:18:40,200 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:40,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1256479328, now seen corresponding path program 9 times [2024-06-04 15:18:40,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:40,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966948394] [2024-06-04 15:18:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:40,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:41,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966948394] [2024-06-04 15:18:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966948394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:41,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:41,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:41,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870745255] [2024-06-04 15:18:41,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:41,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:41,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 591 transitions, 5955 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:41,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:41,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:43,696 INFO L124 PetriNetUnfolderBase]: 4099/6547 cut-off events. [2024-06-04 15:18:43,696 INFO L125 PetriNetUnfolderBase]: For 1940287/1940287 co-relation queries the response was YES. [2024-06-04 15:18:43,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66544 conditions, 6547 events. 4099/6547 cut-off events. For 1940287/1940287 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40892 event pairs, 861 based on Foata normal form. 1/6534 useless extension candidates. Maximal degree in co-relation 66329. Up to 6259 conditions per place. [2024-06-04 15:18:43,837 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 554 selfloop transitions, 45 changer transitions 0/609 dead transitions. [2024-06-04 15:18:43,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 609 transitions, 7705 flow [2024-06-04 15:18:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:18:43,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 15:18:43,840 INFO L175 Difference]: Start difference. First operand has 449 places, 591 transitions, 5955 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:18:43,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 609 transitions, 7705 flow [2024-06-04 15:18:55,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 609 transitions, 7573 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:55,671 INFO L231 Difference]: Finished difference. Result has 451 places, 597 transitions, 6137 flow [2024-06-04 15:18:55,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6137, PETRI_PLACES=451, PETRI_TRANSITIONS=597} [2024-06-04 15:18:55,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-04 15:18:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 597 transitions, 6137 flow [2024-06-04 15:18:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:55,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:55,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 15:18:55,676 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:55,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1256295002, now seen corresponding path program 9 times [2024-06-04 15:18:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650091868] [2024-06-04 15:18:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:56,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:56,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650091868] [2024-06-04 15:18:56,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650091868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:56,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:56,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:56,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488001266] [2024-06-04 15:18:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:56,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:56,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:56,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 597 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:56,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:56,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:58,965 INFO L124 PetriNetUnfolderBase]: 4109/6563 cut-off events. [2024-06-04 15:18:58,965 INFO L125 PetriNetUnfolderBase]: For 1982747/1982747 co-relation queries the response was YES. [2024-06-04 15:18:59,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67280 conditions, 6563 events. 4109/6563 cut-off events. For 1982747/1982747 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40994 event pairs, 859 based on Foata normal form. 2/6551 useless extension candidates. Maximal degree in co-relation 67064. Up to 6217 conditions per place. [2024-06-04 15:18:59,076 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 56 changer transitions 0/615 dead transitions. [2024-06-04 15:18:59,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 615 transitions, 7791 flow [2024-06-04 15:18:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:18:59,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-04 15:18:59,077 INFO L175 Difference]: Start difference. First operand has 451 places, 597 transitions, 6137 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:18:59,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 615 transitions, 7791 flow [2024-06-04 15:19:08,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 615 transitions, 7610 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-04 15:19:08,802 INFO L231 Difference]: Finished difference. Result has 455 places, 600 transitions, 6164 flow [2024-06-04 15:19:08,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6164, PETRI_PLACES=455, PETRI_TRANSITIONS=600} [2024-06-04 15:19:08,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-04 15:19:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 600 transitions, 6164 flow [2024-06-04 15:19:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:08,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:08,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:08,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 15:19:08,803 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:08,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1256301512, now seen corresponding path program 10 times [2024-06-04 15:19:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822759707] [2024-06-04 15:19:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822759707] [2024-06-04 15:19:09,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822759707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:09,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276554480] [2024-06-04 15:19:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:09,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:09,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 600 transitions, 6164 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:09,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:09,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:09,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:12,116 INFO L124 PetriNetUnfolderBase]: 4095/6547 cut-off events. [2024-06-04 15:19:12,116 INFO L125 PetriNetUnfolderBase]: For 1981327/1981327 co-relation queries the response was YES. [2024-06-04 15:19:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66961 conditions, 6547 events. 4095/6547 cut-off events. For 1981327/1981327 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40920 event pairs, 856 based on Foata normal form. 2/6535 useless extension candidates. Maximal degree in co-relation 66743. Up to 6206 conditions per place. [2024-06-04 15:19:12,235 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 550 selfloop transitions, 55 changer transitions 0/615 dead transitions. [2024-06-04 15:19:12,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 615 transitions, 7420 flow [2024-06-04 15:19:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:19:12,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-04 15:19:12,236 INFO L175 Difference]: Start difference. First operand has 455 places, 600 transitions, 6164 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:19:12,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 615 transitions, 7420 flow [2024-06-04 15:19:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 615 transitions, 7142 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:21,182 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 6002 flow [2024-06-04 15:19:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6002, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-04 15:19:21,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-04 15:19:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 6002 flow [2024-06-04 15:19:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:21,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:21,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:21,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 15:19:21,185 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:21,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash -806382854, now seen corresponding path program 10 times [2024-06-04 15:19:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847306499] [2024-06-04 15:19:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847306499] [2024-06-04 15:19:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847306499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893974563] [2024-06-04 15:19:22,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:22,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:22,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:22,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:22,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 6002 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:22,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:22,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:24,681 INFO L124 PetriNetUnfolderBase]: 4100/6553 cut-off events. [2024-06-04 15:19:24,682 INFO L125 PetriNetUnfolderBase]: For 1972719/1972719 co-relation queries the response was YES. [2024-06-04 15:19:24,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66611 conditions, 6553 events. 4100/6553 cut-off events. For 1972719/1972719 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40921 event pairs, 858 based on Foata normal form. 1/6540 useless extension candidates. Maximal degree in co-relation 66393. Up to 6274 conditions per place. [2024-06-04 15:19:24,798 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 568 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-04 15:19:24,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 611 transitions, 7234 flow [2024-06-04 15:19:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:19:24,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-04 15:19:24,799 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 6002 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:19:24,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 611 transitions, 7234 flow Killed by 15