./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix011_tso.oepc.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/mix011_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix011_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:42:35,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:42:35,541 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:42:35,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:42:35,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:42:35,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:42:35,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:42:35,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:42:35,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:42:35,574 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:42:35,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:42:35,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:42:35,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:42:35,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:42:35,576 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:42:35,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:42:35,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:42:35,577 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:42:35,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:42:35,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:42:35,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:42:35,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:42:35,578 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:42:35,578 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:42:35,579 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:42:35,579 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:42:35,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:42:35,579 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:42:35,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:42:35,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:42:35,581 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:42:35,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:42:35,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:42:35,581 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:42:35,581 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:42:35,582 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:42:35,583 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:42:35,583 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:42:35,583 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:42:35,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:42:35,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:42:35,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:42:35,866 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:42:35,866 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:42:35,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-04 14:42:36,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:42:37,234 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:42:37,236 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-04 14:42:37,270 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5780c336d/f26c5c7847e1493181fb4e07d300a197/FLAG34921179d [2024-06-04 14:42:37,283 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5780c336d/f26c5c7847e1493181fb4e07d300a197 [2024-06-04 14:42:37,285 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:42:37,286 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:42:37,288 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_tso.oepc.yml/witness.yml [2024-06-04 14:42:37,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:42:37,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:42:37,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:42:37,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:42:37,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:42:37,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:42:37" (1/2) ... [2024-06-04 14:42:37,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd6c43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:42:37, skipping insertion in model container [2024-06-04 14:42:37,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:42:37" (1/2) ... [2024-06-04 14:42:37,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d8e19c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:42:37, skipping insertion in model container [2024-06-04 14:42:37,496 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:42:37" (2/2) ... [2024-06-04 14:42:37,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd6c43d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:42:37, skipping insertion in model container [2024-06-04 14:42:37,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:42:37" (2/2) ... [2024-06-04 14:42:37,497 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:42:37,560 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:42:37,561 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:42:37,561 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:42:37,561 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_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 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:42:37,561 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:42:37,562 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-04 14:42:37,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:42:37,910 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:42:37,918 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:42:38,033 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:42:38,064 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:42:38,064 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:42:38 WrapperNode [2024-06-04 14:42:38,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:42:38,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:42:38,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:42:38,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:42:38,071 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,083 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,111 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 153 [2024-06-04 14:42:38,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:42:38,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:42:38,112 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:42:38,112 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:42:38,121 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,121 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,124 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,164 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 14:42:38,164 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,165 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,172 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,174 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,176 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,177 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:42:38,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:42:38,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:42:38,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:42:38,181 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 02:42:38" (1/1) ... [2024-06-04 14:42:38,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:42:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:42:38,225 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 14:42:38,270 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 14:42:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:42:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:42:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:42:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:42:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:42:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:42:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:42:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:42:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:42:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:42:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:42:38,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:42:38,283 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 14:42:38,425 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:42:38,427 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:42:38,819 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:42:38,820 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:42:38,977 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:42:38,977 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:42:38,978 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:42:38 BoogieIcfgContainer [2024-06-04 14:42:38,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:42:38,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:42:38,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:42:38,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:42:38,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:42:37" (1/4) ... [2024-06-04 14:42:38,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2813902d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:42:38, skipping insertion in model container [2024-06-04 14:42:38,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:42:37" (2/4) ... [2024-06-04 14:42:38,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2813902d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:42:38, skipping insertion in model container [2024-06-04 14:42:38,984 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 02:42:38" (3/4) ... [2024-06-04 14:42:38,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2813902d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:42:38, skipping insertion in model container [2024-06-04 14:42:38,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:42:38" (4/4) ... [2024-06-04 14:42:38,986 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_tso.oepc.i [2024-06-04 14:42:38,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:42:38,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:42:38,998 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:42:39,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:42:39,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:42:39,127 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-04 14:42:39,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:42:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:42:39,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:42:39,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-04 14:42:39,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:42:39,149 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;@41a53ddb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:42:39,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:42:39,154 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:42:39,154 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 14:42:39,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:42:39,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:39,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:42:39,155 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 14:42:39,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:39,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1127398156, now seen corresponding path program 1 times [2024-06-04 14:42:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254333236] [2024-06-04 14:42:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:40,482 INFO 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 14:42:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254333236] [2024-06-04 14:42:40,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254333236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:40,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:40,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:42:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304242543] [2024-06-04 14:42:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:42:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:42:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:42:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:42:40,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:40,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:40,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:42:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:40,971 INFO L124 PetriNetUnfolderBase]: 1407/2274 cut-off events. [2024-06-04 14:42:40,971 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 14:42:40,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4480 conditions, 2274 events. 1407/2274 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11867 event pairs, 989 based on Foata normal form. 1/2187 useless extension candidates. Maximal degree in co-relation 4465. Up to 2105 conditions per place. [2024-06-04 14:42:40,988 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 14:42:40,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-04 14:42:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:42:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:42:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-04 14:42:40,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:42:40,999 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 77 transitions. [2024-06-04 14:42:41,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-04 14:42:41,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:41,008 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-04 14:42:41,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:42:41,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-04 14:42:41,013 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-04 14:42:41,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:41,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:41,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:41,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:42:41,014 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 14:42:41,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1097853485, now seen corresponding path program 1 times [2024-06-04 14:42:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933677547] [2024-06-04 14:42:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:41,762 INFO 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 14:42:41,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:41,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933677547] [2024-06-04 14:42:41,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933677547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:41,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:41,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:42:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421673679] [2024-06-04 14:42:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:42:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:42:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:42:41,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:42:41,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:41,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:41,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:42:41,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:42,134 INFO L124 PetriNetUnfolderBase]: 1653/2577 cut-off events. [2024-06-04 14:42:42,135 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-04 14:42:42,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2577 events. 1653/2577 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12996 event pairs, 1038 based on Foata normal form. 3/2568 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-04 14:42:42,146 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:42:42,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-04 14:42:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:42:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:42:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 14:42:42,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:42:42,148 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 96 transitions. [2024-06-04 14:42:42,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-04 14:42:42,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:42:42,150 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-04 14:42:42,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-04 14:42:42,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-04 14:42:42,151 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-04 14:42:42,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:42,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:42,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:42:42,152 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 14:42:42,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 326280889, now seen corresponding path program 1 times [2024-06-04 14:42:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:42,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434247739] [2024-06-04 14:42:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:42,975 INFO 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 14:42:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:42,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434247739] [2024-06-04 14:42:42,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434247739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:42,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:42,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:42:42,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536394638] [2024-06-04 14:42:42,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:42:42,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:42,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:42:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:42:43,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:42:43,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:43,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:43,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:42:43,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:43,348 INFO L124 PetriNetUnfolderBase]: 1641/2563 cut-off events. [2024-06-04 14:42:43,349 INFO L125 PetriNetUnfolderBase]: For 1362/1362 co-relation queries the response was YES. [2024-06-04 14:42:43,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6341 conditions, 2563 events. 1641/2563 cut-off events. For 1362/1362 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12969 event pairs, 746 based on Foata normal form. 6/2559 useless extension candidates. Maximal degree in co-relation 6324. Up to 2393 conditions per place. [2024-06-04 14:42:43,362 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-04 14:42:43,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 332 flow [2024-06-04 14:42:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:42:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:42:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:42:43,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-04 14:42:43,364 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:42:43,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 332 flow [2024-06-04 14:42:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:42:43,366 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-04 14:42:43,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-04 14:42:43,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-04 14:42:43,367 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-04 14:42:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:43,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:43,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:43,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:42:43,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:43,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash 23340536, now seen corresponding path program 1 times [2024-06-04 14:42:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:43,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449230378] [2024-06-04 14:42:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:43,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:44,663 INFO 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 14:42:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449230378] [2024-06-04 14:42:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449230378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:44,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:42:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315776277] [2024-06-04 14:42:44,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:42:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:42:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:42:44,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:42:44,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:44,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:44,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:42:44,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:45,157 INFO L124 PetriNetUnfolderBase]: 1632/2544 cut-off events. [2024-06-04 14:42:45,157 INFO L125 PetriNetUnfolderBase]: For 2524/2524 co-relation queries the response was YES. [2024-06-04 14:42:45,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 2544 events. 1632/2544 cut-off events. For 2524/2524 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12805 event pairs, 582 based on Foata normal form. 6/2538 useless extension candidates. Maximal degree in co-relation 6870. Up to 2348 conditions per place. [2024-06-04 14:42:45,170 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-04 14:42:45,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 386 flow [2024-06-04 14:42:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:42:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:42:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 14:42:45,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-04 14:42:45,172 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 135 transitions. [2024-06-04 14:42:45,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 386 flow [2024-06-04 14:42:45,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 362 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:45,175 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 197 flow [2024-06-04 14:42:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-04 14:42:45,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-04 14:42:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 197 flow [2024-06-04 14:42:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:45,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:45,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:42:45,177 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 14:42:45,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -42166931, now seen corresponding path program 1 times [2024-06-04 14:42:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:45,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085793991] [2024-06-04 14:42:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:45,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:45,953 INFO 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 14:42:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085793991] [2024-06-04 14:42:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085793991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:42:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797786289] [2024-06-04 14:42:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:45,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:42:45,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:42:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:42:46,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:42:46,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:46,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:46,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:42:46,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:46,352 INFO L124 PetriNetUnfolderBase]: 1375/2225 cut-off events. [2024-06-04 14:42:46,352 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-04 14:42:46,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 2225 events. 1375/2225 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11551 event pairs, 673 based on Foata normal form. 2/2179 useless extension candidates. Maximal degree in co-relation 6328. Up to 2047 conditions per place. [2024-06-04 14:42:46,364 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-04 14:42:46,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 345 flow [2024-06-04 14:42:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:42:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:42:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-04 14:42:46,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-04 14:42:46,366 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 197 flow. Second operand 5 states and 101 transitions. [2024-06-04 14:42:46,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 345 flow [2024-06-04 14:42:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 312 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:42:46,373 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 210 flow [2024-06-04 14:42:46,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-04 14:42:46,376 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-04 14:42:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 210 flow [2024-06-04 14:42:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:46,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:46,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:46,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:42:46,380 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 14:42:46,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1277680009, now seen corresponding path program 1 times [2024-06-04 14:42:46,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:46,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337901878] [2024-06-04 14:42:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:46,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:47,237 INFO 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 14:42:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:47,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337901878] [2024-06-04 14:42:47,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337901878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:47,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:47,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:42:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831917060] [2024-06-04 14:42:47,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:42:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:42:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:42:47,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:47,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:47,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:47,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:47,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:47,686 INFO L124 PetriNetUnfolderBase]: 1621/2662 cut-off events. [2024-06-04 14:42:47,686 INFO L125 PetriNetUnfolderBase]: For 5188/5188 co-relation queries the response was YES. [2024-06-04 14:42:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 2662 events. 1621/2662 cut-off events. For 5188/5188 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14075 event pairs, 804 based on Foata normal form. 2/2638 useless extension candidates. Maximal degree in co-relation 7897. Up to 2396 conditions per place. [2024-06-04 14:42:47,701 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-04 14:42:47,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 388 flow [2024-06-04 14:42:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:42:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:42:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 14:42:47,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:42:47,704 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 210 flow. Second operand 6 states and 114 transitions. [2024-06-04 14:42:47,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 388 flow [2024-06-04 14:42:47,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 366 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:47,708 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 244 flow [2024-06-04 14:42:47,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-04 14:42:47,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-04 14:42:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 244 flow [2024-06-04 14:42:47,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:47,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:42:47,711 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 14:42:47,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1730984458, now seen corresponding path program 1 times [2024-06-04 14:42:47,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:47,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442758930] [2024-06-04 14:42:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:48,589 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 14:42:48,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:48,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442758930] [2024-06-04 14:42:48,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442758930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:48,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:48,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:42:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251981355] [2024-06-04 14:42:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:48,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:42:48,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:42:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:42:48,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:48,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:48,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:48,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:48,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:49,119 INFO L124 PetriNetUnfolderBase]: 1814/2880 cut-off events. [2024-06-04 14:42:49,119 INFO L125 PetriNetUnfolderBase]: For 8365/8365 co-relation queries the response was YES. [2024-06-04 14:42:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 2880 events. 1814/2880 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14782 event pairs, 884 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 9349. Up to 2655 conditions per place. [2024-06-04 14:42:49,138 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-04 14:42:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 442 flow [2024-06-04 14:42:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:42:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:42:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 14:42:49,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:42:49,139 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 244 flow. Second operand 6 states and 117 transitions. [2024-06-04 14:42:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 442 flow [2024-06-04 14:42:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 410 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:42:49,145 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 270 flow [2024-06-04 14:42:49,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-04 14:42:49,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-04 14:42:49,146 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 270 flow [2024-06-04 14:42:49,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:49,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:49,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:49,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:42:49,147 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 14:42:49,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1867666548, now seen corresponding path program 2 times [2024-06-04 14:42:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:49,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729240121] [2024-06-04 14:42:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:49,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:50,028 INFO 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 14:42:50,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729240121] [2024-06-04 14:42:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729240121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:50,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:42:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933512843] [2024-06-04 14:42:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:42:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:42:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:42:50,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:50,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:50,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:50,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:50,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:50,497 INFO L124 PetriNetUnfolderBase]: 1809/2875 cut-off events. [2024-06-04 14:42:50,497 INFO L125 PetriNetUnfolderBase]: For 10932/10940 co-relation queries the response was YES. [2024-06-04 14:42:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9978 conditions, 2875 events. 1809/2875 cut-off events. For 10932/10940 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14833 event pairs, 891 based on Foata normal form. 10/2885 useless extension candidates. Maximal degree in co-relation 9955. Up to 2630 conditions per place. [2024-06-04 14:42:50,510 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-04 14:42:50,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 466 flow [2024-06-04 14:42:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:42:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:42:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-04 14:42:50,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-04 14:42:50,514 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 270 flow. Second operand 6 states and 116 transitions. [2024-06-04 14:42:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 466 flow [2024-06-04 14:42:50,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 432 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:42:50,519 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 310 flow [2024-06-04 14:42:50,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-04 14:42:50,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-04 14:42:50,520 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 310 flow [2024-06-04 14:42:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:50,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:50,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:42:50,521 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 14:42:50,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1867658612, now seen corresponding path program 1 times [2024-06-04 14:42:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:50,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057550643] [2024-06-04 14:42:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:51,536 INFO 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 14:42:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057550643] [2024-06-04 14:42:51,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057550643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:51,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:51,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554942458] [2024-06-04 14:42:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:51,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:51,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:51,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:51,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:51,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:51,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:52,024 INFO L124 PetriNetUnfolderBase]: 1622/2691 cut-off events. [2024-06-04 14:42:52,025 INFO L125 PetriNetUnfolderBase]: For 11337/11337 co-relation queries the response was YES. [2024-06-04 14:42:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9624 conditions, 2691 events. 1622/2691 cut-off events. For 11337/11337 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14324 event pairs, 774 based on Foata normal form. 2/2683 useless extension candidates. Maximal degree in co-relation 9600. Up to 2389 conditions per place. [2024-06-04 14:42:52,035 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-04 14:42:52,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 532 flow [2024-06-04 14:42:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 14:42:52,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-04 14:42:52,037 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 310 flow. Second operand 7 states and 131 transitions. [2024-06-04 14:42:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 532 flow [2024-06-04 14:42:52,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 482 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:42:52,040 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 330 flow [2024-06-04 14:42:52,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-04 14:42:52,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-04 14:42:52,042 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 330 flow [2024-06-04 14:42:52,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:52,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:52,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:42:52,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:52,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2054629242, now seen corresponding path program 1 times [2024-06-04 14:42:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:52,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605541339] [2024-06-04 14:42:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:52,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:52,902 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 14:42:52,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605541339] [2024-06-04 14:42:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605541339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:52,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770734727] [2024-06-04 14:42:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:52,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:52,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:52,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:52,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:52,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:52,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:53,513 INFO L124 PetriNetUnfolderBase]: 1826/2914 cut-off events. [2024-06-04 14:42:53,513 INFO L125 PetriNetUnfolderBase]: For 16769/16769 co-relation queries the response was YES. [2024-06-04 14:42:53,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11325 conditions, 2914 events. 1826/2914 cut-off events. For 16769/16769 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15001 event pairs, 706 based on Foata normal form. 4/2918 useless extension candidates. Maximal degree in co-relation 11300. Up to 2634 conditions per place. [2024-06-04 14:42:53,526 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-04 14:42:53,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 608 flow [2024-06-04 14:42:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 14:42:53,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-04 14:42:53,528 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 330 flow. Second operand 7 states and 139 transitions. [2024-06-04 14:42:53,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 608 flow [2024-06-04 14:42:53,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 562 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:53,534 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 380 flow [2024-06-04 14:42:53,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-04 14:42:53,536 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-04 14:42:53,537 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 380 flow [2024-06-04 14:42:53,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:53,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:53,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:42:53,538 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 14:42:53,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2054749398, now seen corresponding path program 1 times [2024-06-04 14:42:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:53,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726953404] [2024-06-04 14:42:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:53,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:54,476 INFO 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 14:42:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726953404] [2024-06-04 14:42:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726953404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943384361] [2024-06-04 14:42:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:42:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:54,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:55,060 INFO L124 PetriNetUnfolderBase]: 1952/3044 cut-off events. [2024-06-04 14:42:55,061 INFO L125 PetriNetUnfolderBase]: For 20318/20318 co-relation queries the response was YES. [2024-06-04 14:42:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12615 conditions, 3044 events. 1952/3044 cut-off events. For 20318/20318 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15200 event pairs, 753 based on Foata normal form. 2/3046 useless extension candidates. Maximal degree in co-relation 12588. Up to 2854 conditions per place. [2024-06-04 14:42:55,076 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-04 14:42:55,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 642 flow [2024-06-04 14:42:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 14:42:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 14:42:55,078 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 380 flow. Second operand 7 states and 128 transitions. [2024-06-04 14:42:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 642 flow [2024-06-04 14:42:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 598 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:55,083 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 412 flow [2024-06-04 14:42:55,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-04 14:42:55,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-04 14:42:55,084 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 412 flow [2024-06-04 14:42:55,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:42:55,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:55,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:42:55,084 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 14:42:55,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2120912222, now seen corresponding path program 2 times [2024-06-04 14:42:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684027869] [2024-06-04 14:42:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:55,976 INFO 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 14:42:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684027869] [2024-06-04 14:42:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684027869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:55,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:55,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641006526] [2024-06-04 14:42:55,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:55,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:56,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:56,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:56,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:56,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:56,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:56,623 INFO L124 PetriNetUnfolderBase]: 1883/2980 cut-off events. [2024-06-04 14:42:56,623 INFO L125 PetriNetUnfolderBase]: For 25076/25082 co-relation queries the response was YES. [2024-06-04 14:42:56,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 2980 events. 1883/2980 cut-off events. For 25076/25082 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15246 event pairs, 689 based on Foata normal form. 4/2977 useless extension candidates. Maximal degree in co-relation 13056. Up to 2666 conditions per place. [2024-06-04 14:42:56,636 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 69 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2024-06-04 14:42:56,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 790 flow [2024-06-04 14:42:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-04 14:42:56,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-04 14:42:56,638 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 412 flow. Second operand 7 states and 141 transitions. [2024-06-04 14:42:56,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 790 flow [2024-06-04 14:42:56,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 738 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:56,645 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 502 flow [2024-06-04 14:42:56,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-04 14:42:56,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-04 14:42:56,646 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 502 flow [2024-06-04 14:42:56,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:56,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:56,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:56,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:42:56,647 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 14:42:56,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash 509969150, now seen corresponding path program 3 times [2024-06-04 14:42:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:56,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358180185] [2024-06-04 14:42:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:57,547 INFO 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 14:42:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358180185] [2024-06-04 14:42:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358180185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825207216] [2024-06-04 14:42:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:57,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:57,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:57,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:57,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:57,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:58,055 INFO L124 PetriNetUnfolderBase]: 1869/2982 cut-off events. [2024-06-04 14:42:58,056 INFO L125 PetriNetUnfolderBase]: For 29757/29763 co-relation queries the response was YES. [2024-06-04 14:42:58,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13608 conditions, 2982 events. 1869/2982 cut-off events. For 29757/29763 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15319 event pairs, 701 based on Foata normal form. 8/2990 useless extension candidates. Maximal degree in co-relation 13579. Up to 2615 conditions per place. [2024-06-04 14:42:58,069 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2024-06-04 14:42:58,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 842 flow [2024-06-04 14:42:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 14:42:58,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 14:42:58,071 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 502 flow. Second operand 7 states and 140 transitions. [2024-06-04 14:42:58,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 842 flow [2024-06-04 14:42:58,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 794 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:58,082 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 576 flow [2024-06-04 14:42:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=576, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-04 14:42:58,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-04 14:42:58,083 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 576 flow [2024-06-04 14:42:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:58,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:58,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:58,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:42:58,084 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 14:42:58,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash 509969336, now seen corresponding path program 2 times [2024-06-04 14:42:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:58,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246413736] [2024-06-04 14:42:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:59,034 INFO 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 14:42:59,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:59,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246413736] [2024-06-04 14:42:59,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246413736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:59,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:59,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:59,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008917884] [2024-06-04 14:42:59,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:59,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:59,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:59,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 576 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:42:59,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:59,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:59,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:59,520 INFO L124 PetriNetUnfolderBase]: 1991/3107 cut-off events. [2024-06-04 14:42:59,520 INFO L125 PetriNetUnfolderBase]: For 34200/34210 co-relation queries the response was YES. [2024-06-04 14:42:59,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14821 conditions, 3107 events. 1991/3107 cut-off events. For 34200/34210 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15536 event pairs, 745 based on Foata normal form. 12/3119 useless extension candidates. Maximal degree in co-relation 14790. Up to 2864 conditions per place. [2024-06-04 14:42:59,538 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 26 changer transitions 0/105 dead transitions. [2024-06-04 14:42:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 968 flow [2024-06-04 14:42:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 14:42:59,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-04 14:42:59,540 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 576 flow. Second operand 7 states and 131 transitions. [2024-06-04 14:42:59,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 968 flow [2024-06-04 14:42:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 870 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:59,553 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 632 flow [2024-06-04 14:42:59,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-04 14:42:59,553 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-04 14:42:59,554 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 632 flow [2024-06-04 14:42:59,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:42:59,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:59,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:42:59,554 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:59,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash 510206486, now seen corresponding path program 3 times [2024-06-04 14:42:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:59,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517697951] [2024-06-04 14:42:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:00,424 INFO 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 14:43:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517697951] [2024-06-04 14:43:00,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517697951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:00,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:00,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:00,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870492513] [2024-06-04 14:43:00,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:00,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:00,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:43:00,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:00,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:00,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:00,971 INFO L124 PetriNetUnfolderBase]: 1986/3100 cut-off events. [2024-06-04 14:43:00,971 INFO L125 PetriNetUnfolderBase]: For 38438/38448 co-relation queries the response was YES. [2024-06-04 14:43:00,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15224 conditions, 3100 events. 1986/3100 cut-off events. For 38438/38448 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15488 event pairs, 745 based on Foata normal form. 12/3112 useless extension candidates. Maximal degree in co-relation 15192. Up to 2859 conditions per place. [2024-06-04 14:43:00,986 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2024-06-04 14:43:00,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 876 flow [2024-06-04 14:43:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 14:43:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 14:43:00,988 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 632 flow. Second operand 7 states and 128 transitions. [2024-06-04 14:43:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 876 flow [2024-06-04 14:43:01,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 784 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:01,002 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 602 flow [2024-06-04 14:43:01,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-04 14:43:01,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-04 14:43:01,003 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 602 flow [2024-06-04 14:43:01,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 14:43:01,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:01,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:01,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:43:01,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:01,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1015075437, now seen corresponding path program 1 times [2024-06-04 14:43:01,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:01,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345068683] [2024-06-04 14:43:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:01,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:01,765 INFO 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 14:43:01,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345068683] [2024-06-04 14:43:01,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345068683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:01,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:01,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:43:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636561825] [2024-06-04 14:43:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:01,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:43:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:43:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:43:01,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:01,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 602 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:01,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:01,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:01,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:02,308 INFO L124 PetriNetUnfolderBase]: 2166/3390 cut-off events. [2024-06-04 14:43:02,308 INFO L125 PetriNetUnfolderBase]: For 45590/45590 co-relation queries the response was YES. [2024-06-04 14:43:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16868 conditions, 3390 events. 2166/3390 cut-off events. For 45590/45590 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17026 event pairs, 834 based on Foata normal form. 1/3391 useless extension candidates. Maximal degree in co-relation 16834. Up to 3173 conditions per place. [2024-06-04 14:43:02,325 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 78 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-06-04 14:43:02,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 816 flow [2024-06-04 14:43:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:43:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:43:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-04 14:43:02,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-04 14:43:02,326 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 602 flow. Second operand 5 states and 89 transitions. [2024-06-04 14:43:02,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 816 flow [2024-06-04 14:43:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 754 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:02,346 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 590 flow [2024-06-04 14:43:02,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-04 14:43:02,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-04 14:43:02,347 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 590 flow [2024-06-04 14:43:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:02,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:02,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:43:02,347 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 14:43:02,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -731091541, now seen corresponding path program 1 times [2024-06-04 14:43:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:02,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484529705] [2024-06-04 14:43:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:03,460 INFO 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 14:43:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484529705] [2024-06-04 14:43:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484529705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:03,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:03,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37402423] [2024-06-04 14:43:03,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:03,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:03,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 590 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 14:43:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:04,204 INFO L124 PetriNetUnfolderBase]: 1965/3082 cut-off events. [2024-06-04 14:43:04,204 INFO L125 PetriNetUnfolderBase]: For 50240/50240 co-relation queries the response was YES. [2024-06-04 14:43:04,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16464 conditions, 3082 events. 1965/3082 cut-off events. For 50240/50240 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15692 event pairs, 724 based on Foata normal form. 2/3084 useless extension candidates. Maximal degree in co-relation 16429. Up to 2772 conditions per place. [2024-06-04 14:43:04,221 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 83 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-04 14:43:04,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 862 flow [2024-06-04 14:43:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 14:43:04,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-04 14:43:04,223 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 590 flow. Second operand 7 states and 139 transitions. [2024-06-04 14:43:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 862 flow [2024-06-04 14:43:04,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 810 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:04,240 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 588 flow [2024-06-04 14:43:04,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-04 14:43:04,241 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-04 14:43:04,241 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 588 flow [2024-06-04 14:43:04,241 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 14:43:04,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:04,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:04,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:43:04,242 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 14:43:04,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1320052134, now seen corresponding path program 1 times [2024-06-04 14:43:04,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:04,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421085883] [2024-06-04 14:43:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:04,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:05,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:05,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421085883] [2024-06-04 14:43:05,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421085883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:05,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:05,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662333986] [2024-06-04 14:43:05,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:05,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:05,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:05,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 588 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:05,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:05,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:05,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:05,807 INFO L124 PetriNetUnfolderBase]: 2098/3225 cut-off events. [2024-06-04 14:43:05,807 INFO L125 PetriNetUnfolderBase]: For 55863/55863 co-relation queries the response was YES. [2024-06-04 14:43:05,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17542 conditions, 3225 events. 2098/3225 cut-off events. For 55863/55863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15965 event pairs, 759 based on Foata normal form. 4/3229 useless extension candidates. Maximal degree in co-relation 17506. Up to 2971 conditions per place. [2024-06-04 14:43:05,824 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 95 selfloop transitions, 20 changer transitions 0/121 dead transitions. [2024-06-04 14:43:05,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 948 flow [2024-06-04 14:43:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:43:05,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:43:05,829 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 588 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:43:05,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 948 flow [2024-06-04 14:43:05,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 902 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:05,850 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 644 flow [2024-06-04 14:43:05,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-04 14:43:05,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-04 14:43:05,851 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 644 flow [2024-06-04 14:43:05,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:05,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:05,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:43:05,852 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 14:43:05,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1323777001, now seen corresponding path program 1 times [2024-06-04 14:43:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:05,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349242213] [2024-06-04 14:43:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:06,907 INFO 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 14:43:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349242213] [2024-06-04 14:43:06,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349242213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:06,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:06,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336257361] [2024-06-04 14:43:06,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:07,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:07,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:07,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:07,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:07,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:07,582 INFO L124 PetriNetUnfolderBase]: 2111/3248 cut-off events. [2024-06-04 14:43:07,582 INFO L125 PetriNetUnfolderBase]: For 62421/62421 co-relation queries the response was YES. [2024-06-04 14:43:07,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18333 conditions, 3248 events. 2111/3248 cut-off events. For 62421/62421 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16119 event pairs, 746 based on Foata normal form. 2/3250 useless extension candidates. Maximal degree in co-relation 18296. Up to 3033 conditions per place. [2024-06-04 14:43:07,601 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-04 14:43:07,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 984 flow [2024-06-04 14:43:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:43:07,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:43:07,603 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 644 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:43:07,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 984 flow [2024-06-04 14:43:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 906 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:07,626 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 662 flow [2024-06-04 14:43:07,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=662, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-04 14:43:07,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-04 14:43:07,626 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 662 flow [2024-06-04 14:43:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:07,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:43:07,627 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 14:43:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1323771204, now seen corresponding path program 2 times [2024-06-04 14:43:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630152184] [2024-06-04 14:43:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:08,580 INFO 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 14:43:08,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:08,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630152184] [2024-06-04 14:43:08,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630152184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:08,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773029459] [2024-06-04 14:43:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:08,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:08,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:08,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 662 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:08,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:08,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:08,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:09,244 INFO L124 PetriNetUnfolderBase]: 2183/3347 cut-off events. [2024-06-04 14:43:09,245 INFO L125 PetriNetUnfolderBase]: For 72347/72353 co-relation queries the response was YES. [2024-06-04 14:43:09,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19641 conditions, 3347 events. 2183/3347 cut-off events. For 72347/72353 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16589 event pairs, 741 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 19603. Up to 2989 conditions per place. [2024-06-04 14:43:09,263 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 36 changer transitions 0/135 dead transitions. [2024-06-04 14:43:09,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1322 flow [2024-06-04 14:43:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:43:09,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:43:09,265 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 662 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:43:09,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1322 flow [2024-06-04 14:43:09,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1250 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:09,288 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 844 flow [2024-06-04 14:43:09,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-04 14:43:09,289 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-04 14:43:09,289 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 844 flow [2024-06-04 14:43:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:09,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:09,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:43:09,290 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 14:43:09,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1323776784, now seen corresponding path program 3 times [2024-06-04 14:43:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008263634] [2024-06-04 14:43:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:10,160 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 14:43:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008263634] [2024-06-04 14:43:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008263634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:10,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:10,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505874185] [2024-06-04 14:43:10,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:10,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:10,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:10,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:10,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:10,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:10,856 INFO L124 PetriNetUnfolderBase]: 2173/3333 cut-off events. [2024-06-04 14:43:10,856 INFO L125 PetriNetUnfolderBase]: For 79875/79881 co-relation queries the response was YES. [2024-06-04 14:43:10,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20213 conditions, 3333 events. 2173/3333 cut-off events. For 79875/79881 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16573 event pairs, 734 based on Foata normal form. 4/3331 useless extension candidates. Maximal degree in co-relation 20174. Up to 2981 conditions per place. [2024-06-04 14:43:10,876 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 38 changer transitions 0/133 dead transitions. [2024-06-04 14:43:10,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1258 flow [2024-06-04 14:43:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:43:10,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:43:10,878 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 844 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:43:10,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1258 flow [2024-06-04 14:43:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1148 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:10,914 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 818 flow [2024-06-04 14:43:10,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-04 14:43:10,914 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-04 14:43:10,914 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 818 flow [2024-06-04 14:43:10,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:10,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:10,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:10,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:43:10,915 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 14:43:10,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash -254249848, now seen corresponding path program 4 times [2024-06-04 14:43:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001504278] [2024-06-04 14:43:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:11,885 INFO 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 14:43:11,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001504278] [2024-06-04 14:43:11,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001504278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:11,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:11,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:11,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127055592] [2024-06-04 14:43:11,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:11,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:11,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:11,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:11,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:11,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:12,443 INFO L124 PetriNetUnfolderBase]: 2195/3378 cut-off events. [2024-06-04 14:43:12,444 INFO L125 PetriNetUnfolderBase]: For 86242/86248 co-relation queries the response was YES. [2024-06-04 14:43:12,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20717 conditions, 3378 events. 2195/3378 cut-off events. For 86242/86248 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16859 event pairs, 756 based on Foata normal form. 8/3386 useless extension candidates. Maximal degree in co-relation 20676. Up to 2898 conditions per place. [2024-06-04 14:43:12,461 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 54 changer transitions 0/138 dead transitions. [2024-06-04 14:43:12,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1448 flow [2024-06-04 14:43:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:43:12,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:43:12,463 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 818 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:43:12,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1448 flow [2024-06-04 14:43:12,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1376 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:12,491 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 992 flow [2024-06-04 14:43:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-04 14:43:12,491 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-04 14:43:12,491 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 992 flow [2024-06-04 14:43:12,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:12,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:12,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:43:12,492 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 14:43:12,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1370818192, now seen corresponding path program 5 times [2024-06-04 14:43:12,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:12,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038085626] [2024-06-04 14:43:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:12,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:13,501 INFO 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 14:43:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:13,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038085626] [2024-06-04 14:43:13,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038085626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:13,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:13,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:13,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867530694] [2024-06-04 14:43:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:13,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:13,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 992 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:13,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:13,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:13,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:14,112 INFO L124 PetriNetUnfolderBase]: 2233/3421 cut-off events. [2024-06-04 14:43:14,112 INFO L125 PetriNetUnfolderBase]: For 97150/97156 co-relation queries the response was YES. [2024-06-04 14:43:14,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 3421 events. 2233/3421 cut-off events. For 97150/97156 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16963 event pairs, 767 based on Foata normal form. 8/3426 useless extension candidates. Maximal degree in co-relation 21778. Up to 2939 conditions per place. [2024-06-04 14:43:14,135 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 56 changer transitions 0/142 dead transitions. [2024-06-04 14:43:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1586 flow [2024-06-04 14:43:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 14:43:14,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-04 14:43:14,141 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 992 flow. Second operand 8 states and 158 transitions. [2024-06-04 14:43:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1586 flow [2024-06-04 14:43:14,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1416 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:14,190 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 1010 flow [2024-06-04 14:43:14,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1010, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-04 14:43:14,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-04 14:43:14,191 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 1010 flow [2024-06-04 14:43:14,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:14,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:14,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:43:14,192 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 14:43:14,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1363199415, now seen corresponding path program 2 times [2024-06-04 14:43:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921975308] [2024-06-04 14:43:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:15,129 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 14:43:15,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:15,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921975308] [2024-06-04 14:43:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921975308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:15,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884954697] [2024-06-04 14:43:15,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:15,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:15,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:15,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:15,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:15,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:15,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:15,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:15,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:15,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:15,667 INFO L124 PetriNetUnfolderBase]: 2226/3421 cut-off events. [2024-06-04 14:43:15,668 INFO L125 PetriNetUnfolderBase]: For 99144/99154 co-relation queries the response was YES. [2024-06-04 14:43:15,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21651 conditions, 3421 events. 2226/3421 cut-off events. For 99144/99154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17030 event pairs, 750 based on Foata normal form. 12/3433 useless extension candidates. Maximal degree in co-relation 21608. Up to 3121 conditions per place. [2024-06-04 14:43:15,690 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 38 changer transitions 0/142 dead transitions. [2024-06-04 14:43:15,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1546 flow [2024-06-04 14:43:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:43:15,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-04 14:43:15,692 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 1010 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:43:15,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1546 flow [2024-06-04 14:43:15,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 142 transitions, 1408 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:15,743 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 1074 flow [2024-06-04 14:43:15,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1074, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-06-04 14:43:15,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-04 14:43:15,744 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 1074 flow [2024-06-04 14:43:15,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:15,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:15,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:43:15,744 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:15,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash 468833515, now seen corresponding path program 3 times [2024-06-04 14:43:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:15,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818217499] [2024-06-04 14:43:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:16,523 INFO 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 14:43:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818217499] [2024-06-04 14:43:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818217499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:16,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:16,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234530317] [2024-06-04 14:43:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:16,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:16,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 1074 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:16,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:16,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:16,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:17,117 INFO L124 PetriNetUnfolderBase]: 2237/3442 cut-off events. [2024-06-04 14:43:17,117 INFO L125 PetriNetUnfolderBase]: For 107484/107494 co-relation queries the response was YES. [2024-06-04 14:43:17,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22213 conditions, 3442 events. 2237/3442 cut-off events. For 107484/107494 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17214 event pairs, 750 based on Foata normal form. 12/3454 useless extension candidates. Maximal degree in co-relation 22169. Up to 3133 conditions per place. [2024-06-04 14:43:17,138 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 101 selfloop transitions, 38 changer transitions 0/145 dead transitions. [2024-06-04 14:43:17,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1570 flow [2024-06-04 14:43:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:43:17,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-04 14:43:17,140 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 1074 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:43:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1570 flow [2024-06-04 14:43:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 1472 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:17,198 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1122 flow [2024-06-04 14:43:17,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2024-06-04 14:43:17,198 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-04 14:43:17,198 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1122 flow [2024-06-04 14:43:17,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:17,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:17,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:17,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:43:17,199 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 14:43:17,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1363466325, now seen corresponding path program 4 times [2024-06-04 14:43:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634577877] [2024-06-04 14:43:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:18,013 INFO 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 14:43:18,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634577877] [2024-06-04 14:43:18,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634577877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:18,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787272819] [2024-06-04 14:43:18,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:18,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:18,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:18,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:18,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1122 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:18,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:18,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:18,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:18,659 INFO L124 PetriNetUnfolderBase]: 2232/3435 cut-off events. [2024-06-04 14:43:18,659 INFO L125 PetriNetUnfolderBase]: For 113960/113970 co-relation queries the response was YES. [2024-06-04 14:43:18,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22457 conditions, 3435 events. 2232/3435 cut-off events. For 113960/113970 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17194 event pairs, 750 based on Foata normal form. 12/3447 useless extension candidates. Maximal degree in co-relation 22411. Up to 3128 conditions per place. [2024-06-04 14:43:18,682 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 39 changer transitions 0/143 dead transitions. [2024-06-04 14:43:18,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 1454 flow [2024-06-04 14:43:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:43:18,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-04 14:43:18,683 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1122 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:43:18,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 1454 flow [2024-06-04 14:43:18,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 1312 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:18,751 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 1066 flow [2024-06-04 14:43:18,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-04 14:43:18,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-04 14:43:18,752 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 1066 flow [2024-06-04 14:43:18,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:18,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:18,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:43:18,752 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 14:43:18,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1363466542, now seen corresponding path program 6 times [2024-06-04 14:43:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077988455] [2024-06-04 14:43:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:19,690 INFO 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 14:43:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:19,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077988455] [2024-06-04 14:43:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077988455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:19,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491726597] [2024-06-04 14:43:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:19,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:19,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 1066 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:19,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:19,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:20,317 INFO L124 PetriNetUnfolderBase]: 2224/3426 cut-off events. [2024-06-04 14:43:20,317 INFO L125 PetriNetUnfolderBase]: For 120359/120365 co-relation queries the response was YES. [2024-06-04 14:43:20,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 3426 events. 2224/3426 cut-off events. For 120359/120365 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17116 event pairs, 744 based on Foata normal form. 8/3434 useless extension candidates. Maximal degree in co-relation 22461. Up to 2934 conditions per place. [2024-06-04 14:43:20,338 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-04 14:43:20,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 148 transitions, 1526 flow [2024-06-04 14:43:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:43:20,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:43:20,340 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 1066 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:43:20,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 148 transitions, 1526 flow [2024-06-04 14:43:20,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 148 transitions, 1384 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 14:43:20,403 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 1052 flow [2024-06-04 14:43:20,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1052, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-04 14:43:20,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-04 14:43:20,404 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 1052 flow [2024-06-04 14:43:20,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:20,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:20,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:20,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:43:20,405 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 14:43:20,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1363189495, now seen corresponding path program 1 times [2024-06-04 14:43:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:20,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145030619] [2024-06-04 14:43:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:20,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:21,622 INFO 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 14:43:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145030619] [2024-06-04 14:43:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145030619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:21,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:21,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:21,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793013017] [2024-06-04 14:43:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:21,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:21,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:21,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:21,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 1052 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:21,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:21,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:21,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:22,289 INFO L124 PetriNetUnfolderBase]: 2207/3501 cut-off events. [2024-06-04 14:43:22,289 INFO L125 PetriNetUnfolderBase]: For 124536/124536 co-relation queries the response was YES. [2024-06-04 14:43:22,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22586 conditions, 3501 events. 2207/3501 cut-off events. For 124536/124536 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18057 event pairs, 719 based on Foata normal form. 2/3503 useless extension candidates. Maximal degree in co-relation 22538. Up to 3174 conditions per place. [2024-06-04 14:43:22,311 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-04 14:43:22,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1479 flow [2024-06-04 14:43:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:43:22,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-04 14:43:22,313 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 1052 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:43:22,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1479 flow [2024-06-04 14:43:22,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 153 transitions, 1335 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:43:22,388 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1033 flow [2024-06-04 14:43:22,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1033, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-04 14:43:22,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-04 14:43:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1033 flow [2024-06-04 14:43:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:22,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:22,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:22,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:43:22,389 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:22,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1402569215, now seen corresponding path program 1 times [2024-06-04 14:43:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:22,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614937820] [2024-06-04 14:43:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:23,144 INFO 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 14:43:23,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:23,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614937820] [2024-06-04 14:43:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614937820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:23,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:43:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073819104] [2024-06-04 14:43:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:23,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:43:23,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:43:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:43:23,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:23,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1033 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:23,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:23,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:23,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:23,808 INFO L124 PetriNetUnfolderBase]: 2306/3598 cut-off events. [2024-06-04 14:43:23,808 INFO L125 PetriNetUnfolderBase]: For 128870/128870 co-relation queries the response was YES. [2024-06-04 14:43:23,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23404 conditions, 3598 events. 2306/3598 cut-off events. For 128870/128870 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18062 event pairs, 781 based on Foata normal form. 2/3600 useless extension candidates. Maximal degree in co-relation 23354. Up to 3340 conditions per place. [2024-06-04 14:43:23,877 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2024-06-04 14:43:23,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 139 transitions, 1331 flow [2024-06-04 14:43:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:43:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:43:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 14:43:23,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-04 14:43:23,884 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1033 flow. Second operand 6 states and 103 transitions. [2024-06-04 14:43:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 139 transitions, 1331 flow [2024-06-04 14:43:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 139 transitions, 1251 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:23,945 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1015 flow [2024-06-04 14:43:23,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1015, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-06-04 14:43:23,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-04 14:43:23,946 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1015 flow [2024-06-04 14:43:23,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:23,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:23,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:43:23,947 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 14:43:23,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2030916933, now seen corresponding path program 1 times [2024-06-04 14:43:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:23,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657616667] [2024-06-04 14:43:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:24,957 INFO 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 14:43:24,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:24,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657616667] [2024-06-04 14:43:24,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657616667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:24,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:24,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857536616] [2024-06-04 14:43:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:25,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:25,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1015 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 14:43:25,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:25,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:25,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:25,757 INFO L124 PetriNetUnfolderBase]: 2335/3640 cut-off events. [2024-06-04 14:43:25,757 INFO L125 PetriNetUnfolderBase]: For 155163/155163 co-relation queries the response was YES. [2024-06-04 14:43:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25421 conditions, 3640 events. 2335/3640 cut-off events. For 155163/155163 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18821 event pairs, 600 based on Foata normal form. 4/3640 useless extension candidates. Maximal degree in co-relation 25370. Up to 3232 conditions per place. [2024-06-04 14:43:25,787 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 126 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2024-06-04 14:43:25,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 162 transitions, 1433 flow [2024-06-04 14:43:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 14:43:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-04 14:43:25,789 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1015 flow. Second operand 8 states and 155 transitions. [2024-06-04 14:43:25,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 162 transitions, 1433 flow [2024-06-04 14:43:25,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 162 transitions, 1393 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:25,860 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1074 flow [2024-06-04 14:43:25,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1074, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-04 14:43:25,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-04 14:43:25,861 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1074 flow [2024-06-04 14:43:25,861 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 14:43:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:25,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:43:25,862 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 14:43:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2030856483, now seen corresponding path program 2 times [2024-06-04 14:43:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755825299] [2024-06-04 14:43:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:27,274 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 14:43:27,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:27,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755825299] [2024-06-04 14:43:27,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755825299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:27,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254268150] [2024-06-04 14:43:27,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:27,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:27,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:27,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:27,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1074 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 14:43:27,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:27,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:28,238 INFO L124 PetriNetUnfolderBase]: 2421/3775 cut-off events. [2024-06-04 14:43:28,239 INFO L125 PetriNetUnfolderBase]: For 166972/166976 co-relation queries the response was YES. [2024-06-04 14:43:28,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26691 conditions, 3775 events. 2421/3775 cut-off events. For 166972/166976 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19543 event pairs, 744 based on Foata normal form. 8/3779 useless extension candidates. Maximal degree in co-relation 26639. Up to 3337 conditions per place. [2024-06-04 14:43:28,263 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-06-04 14:43:28,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1708 flow [2024-06-04 14:43:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:43:28,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-04 14:43:28,264 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1074 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:43:28,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1708 flow [2024-06-04 14:43:28,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 1605 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:28,347 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1310 flow [2024-06-04 14:43:28,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-04 14:43:28,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-04 14:43:28,347 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1310 flow [2024-06-04 14:43:28,347 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 14:43:28,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:28,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:28,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:43:28,348 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 14:43:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash -599026661, now seen corresponding path program 3 times [2024-06-04 14:43:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:28,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772512272] [2024-06-04 14:43:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:29,589 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 14:43:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772512272] [2024-06-04 14:43:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772512272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:29,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601926039] [2024-06-04 14:43:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:29,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:29,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:29,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1310 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 14:43:29,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:29,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:29,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:30,391 INFO L124 PetriNetUnfolderBase]: 2541/3955 cut-off events. [2024-06-04 14:43:30,391 INFO L125 PetriNetUnfolderBase]: For 181596/181606 co-relation queries the response was YES. [2024-06-04 14:43:30,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 3955 events. 2541/3955 cut-off events. For 181596/181606 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20597 event pairs, 741 based on Foata normal form. 14/3965 useless extension candidates. Maximal degree in co-relation 28392. Up to 3464 conditions per place. [2024-06-04 14:43:30,421 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 142 selfloop transitions, 51 changer transitions 0/212 dead transitions. [2024-06-04 14:43:30,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 212 transitions, 2180 flow [2024-06-04 14:43:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:43:30,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:43:30,423 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1310 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:43:30,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 212 transitions, 2180 flow [2024-06-04 14:43:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 212 transitions, 2034 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-04 14:43:30,525 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1732 flow [2024-06-04 14:43:30,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-04 14:43:30,526 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-04 14:43:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1732 flow [2024-06-04 14:43:30,526 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 14:43:30,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:30,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:43:30,526 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 14:43:30,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1651565681, now seen corresponding path program 4 times [2024-06-04 14:43:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890700894] [2024-06-04 14:43:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:31,689 INFO 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 14:43:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:31,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890700894] [2024-06-04 14:43:31,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890700894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:31,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:31,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159865312] [2024-06-04 14:43:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:31,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1732 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 14:43:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:31,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:32,640 INFO L124 PetriNetUnfolderBase]: 2657/4129 cut-off events. [2024-06-04 14:43:32,641 INFO L125 PetriNetUnfolderBase]: For 195674/195682 co-relation queries the response was YES. [2024-06-04 14:43:32,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30285 conditions, 4129 events. 2657/4129 cut-off events. For 195674/195682 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 21568 event pairs, 744 based on Foata normal form. 12/4137 useless extension candidates. Maximal degree in co-relation 30224. Up to 3588 conditions per place. [2024-06-04 14:43:32,671 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 153 selfloop transitions, 73 changer transitions 0/245 dead transitions. [2024-06-04 14:43:32,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 245 transitions, 2805 flow [2024-06-04 14:43:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 14:43:32,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:43:32,673 INFO L175 Difference]: Start difference. First operand has 134 places, 178 transitions, 1732 flow. Second operand 9 states and 176 transitions. [2024-06-04 14:43:32,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 245 transitions, 2805 flow [2024-06-04 14:43:32,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 245 transitions, 2591 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:32,804 INFO L231 Difference]: Finished difference. Result has 141 places, 213 transitions, 2305 flow [2024-06-04 14:43:32,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2305, PETRI_PLACES=141, PETRI_TRANSITIONS=213} [2024-06-04 14:43:32,805 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-04 14:43:32,805 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 213 transitions, 2305 flow [2024-06-04 14:43:32,805 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 14:43:32,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:32,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:43:32,806 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 14:43:32,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 413665995, now seen corresponding path program 1 times [2024-06-04 14:43:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857895299] [2024-06-04 14:43:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:33,950 INFO 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 14:43:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857895299] [2024-06-04 14:43:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857895299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267814906] [2024-06-04 14:43:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 213 transitions, 2305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:34,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:34,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:34,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:34,863 INFO L124 PetriNetUnfolderBase]: 2858/4359 cut-off events. [2024-06-04 14:43:34,863 INFO L125 PetriNetUnfolderBase]: For 219085/219101 co-relation queries the response was YES. [2024-06-04 14:43:34,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 4359 events. 2858/4359 cut-off events. For 219085/219101 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 22442 event pairs, 956 based on Foata normal form. 6/4343 useless extension candidates. Maximal degree in co-relation 32673. Up to 3942 conditions per place. [2024-06-04 14:43:34,900 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 171 selfloop transitions, 74 changer transitions 0/252 dead transitions. [2024-06-04 14:43:34,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 252 transitions, 2990 flow [2024-06-04 14:43:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:43:34,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 14:43:34,902 INFO L175 Difference]: Start difference. First operand has 141 places, 213 transitions, 2305 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:43:34,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 252 transitions, 2990 flow [2024-06-04 14:43:35,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 252 transitions, 2829 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:35,079 INFO L231 Difference]: Finished difference. Result has 146 places, 219 transitions, 2402 flow [2024-06-04 14:43:35,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2402, PETRI_PLACES=146, PETRI_TRANSITIONS=219} [2024-06-04 14:43:35,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-04 14:43:35,080 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 219 transitions, 2402 flow [2024-06-04 14:43:35,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:35,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:35,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:43:35,080 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 14:43:35,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash 521143809, now seen corresponding path program 1 times [2024-06-04 14:43:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:35,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034243626] [2024-06-04 14:43:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:36,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034243626] [2024-06-04 14:43:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034243626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:36,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937460916] [2024-06-04 14:43:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:36,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:36,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 219 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:36,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:36,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:36,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:36,921 INFO L124 PetriNetUnfolderBase]: 2850/4356 cut-off events. [2024-06-04 14:43:36,921 INFO L125 PetriNetUnfolderBase]: For 223790/223803 co-relation queries the response was YES. [2024-06-04 14:43:36,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32711 conditions, 4356 events. 2850/4356 cut-off events. For 223790/223803 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 22351 event pairs, 796 based on Foata normal form. 12/4356 useless extension candidates. Maximal degree in co-relation 32645. Up to 3935 conditions per place. [2024-06-04 14:43:36,959 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 189 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-04 14:43:36,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 263 transitions, 3150 flow [2024-06-04 14:43:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:43:36,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:43:36,961 INFO L175 Difference]: Start difference. First operand has 146 places, 219 transitions, 2402 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:43:36,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 263 transitions, 3150 flow [2024-06-04 14:43:37,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 263 transitions, 2968 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:37,114 INFO L231 Difference]: Finished difference. Result has 150 places, 226 transitions, 2498 flow [2024-06-04 14:43:37,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2498, PETRI_PLACES=150, PETRI_TRANSITIONS=226} [2024-06-04 14:43:37,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-04 14:43:37,115 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 226 transitions, 2498 flow [2024-06-04 14:43:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:37,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:37,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:37,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:43:37,115 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 14:43:37,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 118755083, now seen corresponding path program 2 times [2024-06-04 14:43:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:37,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529835168] [2024-06-04 14:43:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:38,298 INFO 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 14:43:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529835168] [2024-06-04 14:43:38,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529835168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:38,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:38,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:38,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986427032] [2024-06-04 14:43:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:38,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:38,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 226 transitions, 2498 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:38,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:38,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:38,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:39,216 INFO L124 PetriNetUnfolderBase]: 2894/4425 cut-off events. [2024-06-04 14:43:39,216 INFO L125 PetriNetUnfolderBase]: For 231089/231097 co-relation queries the response was YES. [2024-06-04 14:43:39,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33703 conditions, 4425 events. 2894/4425 cut-off events. For 231089/231097 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 22695 event pairs, 763 based on Foata normal form. 10/4431 useless extension candidates. Maximal degree in co-relation 33635. Up to 3977 conditions per place. [2024-06-04 14:43:39,250 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 182 selfloop transitions, 81 changer transitions 0/270 dead transitions. [2024-06-04 14:43:39,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 270 transitions, 3294 flow [2024-06-04 14:43:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:43:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-04 14:43:39,252 INFO L175 Difference]: Start difference. First operand has 150 places, 226 transitions, 2498 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:43:39,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 270 transitions, 3294 flow [2024-06-04 14:43:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 270 transitions, 3118 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:39,392 INFO L231 Difference]: Finished difference. Result has 154 places, 238 transitions, 2689 flow [2024-06-04 14:43:39,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2689, PETRI_PLACES=154, PETRI_TRANSITIONS=238} [2024-06-04 14:43:39,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-04 14:43:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 238 transitions, 2689 flow [2024-06-04 14:43:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:43:39,394 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:39,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1648764211, now seen corresponding path program 2 times [2024-06-04 14:43:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957640408] [2024-06-04 14:43:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:40,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:40,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957640408] [2024-06-04 14:43:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957640408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:40,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:40,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:40,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099400695] [2024-06-04 14:43:40,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:40,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:40,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:40,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 238 transitions, 2689 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:40,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:40,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:40,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:41,360 INFO L124 PetriNetUnfolderBase]: 2946/4513 cut-off events. [2024-06-04 14:43:41,360 INFO L125 PetriNetUnfolderBase]: For 248673/248681 co-relation queries the response was YES. [2024-06-04 14:43:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34701 conditions, 4513 events. 2946/4513 cut-off events. For 248673/248681 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 23352 event pairs, 761 based on Foata normal form. 12/4517 useless extension candidates. Maximal degree in co-relation 34632. Up to 4058 conditions per place. [2024-06-04 14:43:41,398 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 200 selfloop transitions, 74 changer transitions 0/281 dead transitions. [2024-06-04 14:43:41,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 281 transitions, 3454 flow [2024-06-04 14:43:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 14:43:41,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:43:41,400 INFO L175 Difference]: Start difference. First operand has 154 places, 238 transitions, 2689 flow. Second operand 10 states and 185 transitions. [2024-06-04 14:43:41,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 281 transitions, 3454 flow [2024-06-04 14:43:41,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 281 transitions, 3270 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:41,571 INFO L231 Difference]: Finished difference. Result has 158 places, 246 transitions, 2790 flow [2024-06-04 14:43:41,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2790, PETRI_PLACES=158, PETRI_TRANSITIONS=246} [2024-06-04 14:43:41,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-04 14:43:41,571 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 246 transitions, 2790 flow [2024-06-04 14:43:41,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:41,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:41,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:41,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:43:41,572 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:41,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1039762163, now seen corresponding path program 3 times [2024-06-04 14:43:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908631426] [2024-06-04 14:43:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:41,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:42,551 INFO 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 14:43:42,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:42,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908631426] [2024-06-04 14:43:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908631426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:42,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684738673] [2024-06-04 14:43:42,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:42,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:42,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 246 transitions, 2790 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:42,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:42,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:42,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:43,550 INFO L124 PetriNetUnfolderBase]: 3165/4848 cut-off events. [2024-06-04 14:43:43,551 INFO L125 PetriNetUnfolderBase]: For 274232/274236 co-relation queries the response was YES. [2024-06-04 14:43:43,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37744 conditions, 4848 events. 3165/4848 cut-off events. For 274232/274236 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25403 event pairs, 694 based on Foata normal form. 12/4856 useless extension candidates. Maximal degree in co-relation 37673. Up to 3967 conditions per place. [2024-06-04 14:43:43,595 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 178 selfloop transitions, 126 changer transitions 0/311 dead transitions. [2024-06-04 14:43:43,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 311 transitions, 3981 flow [2024-06-04 14:43:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:43:43,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-04 14:43:43,600 INFO L175 Difference]: Start difference. First operand has 158 places, 246 transitions, 2790 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:43:43,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 311 transitions, 3981 flow [2024-06-04 14:43:43,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 311 transitions, 3841 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:43,781 INFO L231 Difference]: Finished difference. Result has 167 places, 269 transitions, 3334 flow [2024-06-04 14:43:43,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3334, PETRI_PLACES=167, PETRI_TRANSITIONS=269} [2024-06-04 14:43:43,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-04 14:43:43,782 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 269 transitions, 3334 flow [2024-06-04 14:43:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:43,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:43,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:43,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:43:43,783 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:43,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1039755653, now seen corresponding path program 4 times [2024-06-04 14:43:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:43,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558775752] [2024-06-04 14:43:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:43,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:44,799 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 14:43:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558775752] [2024-06-04 14:43:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558775752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246613106] [2024-06-04 14:43:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:44,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:44,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 269 transitions, 3334 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:44,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:44,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:44,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:45,743 INFO L124 PetriNetUnfolderBase]: 3187/4890 cut-off events. [2024-06-04 14:43:45,743 INFO L125 PetriNetUnfolderBase]: For 290845/290849 co-relation queries the response was YES. [2024-06-04 14:43:45,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39830 conditions, 4890 events. 3187/4890 cut-off events. For 290845/290849 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25776 event pairs, 697 based on Foata normal form. 8/4894 useless extension candidates. Maximal degree in co-relation 39755. Up to 3976 conditions per place. [2024-06-04 14:43:45,789 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 185 selfloop transitions, 122 changer transitions 0/314 dead transitions. [2024-06-04 14:43:45,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 4352 flow [2024-06-04 14:43:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 14:43:45,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-04 14:43:45,791 INFO L175 Difference]: Start difference. First operand has 167 places, 269 transitions, 3334 flow. Second operand 10 states and 193 transitions. [2024-06-04 14:43:45,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 4352 flow [2024-06-04 14:43:46,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 314 transitions, 4194 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:46,015 INFO L231 Difference]: Finished difference. Result has 174 places, 273 transitions, 3574 flow [2024-06-04 14:43:46,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3574, PETRI_PLACES=174, PETRI_TRANSITIONS=273} [2024-06-04 14:43:46,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-04 14:43:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 273 transitions, 3574 flow [2024-06-04 14:43:46,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:46,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:46,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:46,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:43:46,018 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:46,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1039577713, now seen corresponding path program 5 times [2024-06-04 14:43:46,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:46,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203918165] [2024-06-04 14:43:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:46,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:47,248 INFO 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 14:43:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203918165] [2024-06-04 14:43:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203918165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621742164] [2024-06-04 14:43:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:47,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 273 transitions, 3574 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 14:43:47,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:47,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:48,252 INFO L124 PetriNetUnfolderBase]: 3012/4715 cut-off events. [2024-06-04 14:43:48,252 INFO L125 PetriNetUnfolderBase]: For 304090/304119 co-relation queries the response was YES. [2024-06-04 14:43:48,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 4715 events. 3012/4715 cut-off events. For 304090/304119 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25588 event pairs, 693 based on Foata normal form. 13/4717 useless extension candidates. Maximal degree in co-relation 39656. Up to 4026 conditions per place. [2024-06-04 14:43:48,296 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 192 selfloop transitions, 87 changer transitions 0/307 dead transitions. [2024-06-04 14:43:48,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 307 transitions, 4321 flow [2024-06-04 14:43:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 14:43:48,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:43:48,298 INFO L175 Difference]: Start difference. First operand has 174 places, 273 transitions, 3574 flow. Second operand 9 states and 176 transitions. [2024-06-04 14:43:48,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 307 transitions, 4321 flow [2024-06-04 14:43:48,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 307 transitions, 4065 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:48,506 INFO L231 Difference]: Finished difference. Result has 178 places, 276 transitions, 3635 flow [2024-06-04 14:43:48,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3635, PETRI_PLACES=178, PETRI_TRANSITIONS=276} [2024-06-04 14:43:48,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-04 14:43:48,506 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 276 transitions, 3635 flow [2024-06-04 14:43:48,507 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 14:43:48,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:48,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:48,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:43:48,507 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 14:43:48,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash -653125, now seen corresponding path program 5 times [2024-06-04 14:43:48,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:48,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632946582] [2024-06-04 14:43:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:49,537 INFO 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 14:43:49,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632946582] [2024-06-04 14:43:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632946582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:49,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:49,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434206498] [2024-06-04 14:43:49,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:49,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:49,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 276 transitions, 3635 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:49,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:49,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:50,580 INFO L124 PetriNetUnfolderBase]: 3209/4928 cut-off events. [2024-06-04 14:43:50,581 INFO L125 PetriNetUnfolderBase]: For 316728/316752 co-relation queries the response was YES. [2024-06-04 14:43:50,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41286 conditions, 4928 events. 3209/4928 cut-off events. For 316728/316752 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26026 event pairs, 741 based on Foata normal form. 28/4951 useless extension candidates. Maximal degree in co-relation 41206. Up to 4009 conditions per place. [2024-06-04 14:43:50,631 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 197 selfloop transitions, 115 changer transitions 0/319 dead transitions. [2024-06-04 14:43:50,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 4650 flow [2024-06-04 14:43:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:43:50,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-04 14:43:50,632 INFO L175 Difference]: Start difference. First operand has 178 places, 276 transitions, 3635 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:43:50,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 4650 flow [2024-06-04 14:43:50,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 319 transitions, 4409 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:50,937 INFO L231 Difference]: Finished difference. Result has 182 places, 279 transitions, 3720 flow [2024-06-04 14:43:50,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3720, PETRI_PLACES=182, PETRI_TRANSITIONS=279} [2024-06-04 14:43:50,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-04 14:43:50,938 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 279 transitions, 3720 flow [2024-06-04 14:43:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:50,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:50,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:43:50,939 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:50,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1543584554, now seen corresponding path program 1 times [2024-06-04 14:43:50,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:50,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006304057] [2024-06-04 14:43:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:51,597 INFO 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 14:43:51,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:51,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006304057] [2024-06-04 14:43:51,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006304057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:51,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:51,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:43:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343969411] [2024-06-04 14:43:51,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:43:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:43:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:43:51,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:43:51,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 279 transitions, 3720 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:51,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:51,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:43:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:52,540 INFO L124 PetriNetUnfolderBase]: 3481/5230 cut-off events. [2024-06-04 14:43:52,540 INFO L125 PetriNetUnfolderBase]: For 340760/340769 co-relation queries the response was YES. [2024-06-04 14:43:52,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43650 conditions, 5230 events. 3481/5230 cut-off events. For 340760/340769 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26643 event pairs, 1201 based on Foata normal form. 5/5223 useless extension candidates. Maximal degree in co-relation 43569. Up to 4989 conditions per place. [2024-06-04 14:43:52,592 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 254 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2024-06-04 14:43:52,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4488 flow [2024-06-04 14:43:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:43:52,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-04 14:43:52,593 INFO L175 Difference]: Start difference. First operand has 182 places, 279 transitions, 3720 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:43:52,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4488 flow [2024-06-04 14:43:52,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 303 transitions, 4259 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:52,960 INFO L231 Difference]: Finished difference. Result has 183 places, 285 transitions, 3626 flow [2024-06-04 14:43:52,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3626, PETRI_PLACES=183, PETRI_TRANSITIONS=285} [2024-06-04 14:43:52,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-04 14:43:52,960 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 285 transitions, 3626 flow [2024-06-04 14:43:52,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:52,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:52,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:52,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:43:52,961 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 14:43:52,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1188999529, now seen corresponding path program 3 times [2024-06-04 14:43:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739700008] [2024-06-04 14:43:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:52,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:54,121 INFO 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 14:43:54,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:54,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739700008] [2024-06-04 14:43:54,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739700008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:54,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:54,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:54,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593004072] [2024-06-04 14:43:54,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:54,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:54,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:54,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:54,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 285 transitions, 3626 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:54,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:54,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:54,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:55,258 INFO L124 PetriNetUnfolderBase]: 3253/4982 cut-off events. [2024-06-04 14:43:55,258 INFO L125 PetriNetUnfolderBase]: For 354096/354114 co-relation queries the response was YES. [2024-06-04 14:43:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42751 conditions, 4982 events. 3253/4982 cut-off events. For 354096/354114 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26390 event pairs, 932 based on Foata normal form. 6/4965 useless extension candidates. Maximal degree in co-relation 42669. Up to 4353 conditions per place. [2024-06-04 14:43:55,304 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 197 selfloop transitions, 107 changer transitions 0/313 dead transitions. [2024-06-04 14:43:55,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 313 transitions, 4330 flow [2024-06-04 14:43:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:43:55,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:43:55,305 INFO L175 Difference]: Start difference. First operand has 183 places, 285 transitions, 3626 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:43:55,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 313 transitions, 4330 flow [2024-06-04 14:43:55,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 313 transitions, 4227 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:55,619 INFO L231 Difference]: Finished difference. Result has 188 places, 285 transitions, 3777 flow [2024-06-04 14:43:55,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3777, PETRI_PLACES=188, PETRI_TRANSITIONS=285} [2024-06-04 14:43:55,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-04 14:43:55,620 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 285 transitions, 3777 flow [2024-06-04 14:43:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:43:55,620 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 14:43:55,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1733022751, now seen corresponding path program 6 times [2024-06-04 14:43:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908048155] [2024-06-04 14:43:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908048155] [2024-06-04 14:43:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908048155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:56,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:56,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:56,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463387071] [2024-06-04 14:43:56,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:56,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:56,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:56,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 285 transitions, 3777 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:56,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:57,737 INFO L124 PetriNetUnfolderBase]: 3262/5011 cut-off events. [2024-06-04 14:43:57,737 INFO L125 PetriNetUnfolderBase]: For 362621/362634 co-relation queries the response was YES. [2024-06-04 14:43:57,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43454 conditions, 5011 events. 3262/5011 cut-off events. For 362621/362634 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26591 event pairs, 758 based on Foata normal form. 12/5017 useless extension candidates. Maximal degree in co-relation 43371. Up to 4362 conditions per place. [2024-06-04 14:43:57,787 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 219 selfloop transitions, 93 changer transitions 0/321 dead transitions. [2024-06-04 14:43:57,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 321 transitions, 4609 flow [2024-06-04 14:43:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:43:57,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:43:57,788 INFO L175 Difference]: Start difference. First operand has 188 places, 285 transitions, 3777 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:43:57,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 321 transitions, 4609 flow [2024-06-04 14:43:58,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 321 transitions, 4290 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:43:58,119 INFO L231 Difference]: Finished difference. Result has 189 places, 288 transitions, 3764 flow [2024-06-04 14:43:58,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3764, PETRI_PLACES=189, PETRI_TRANSITIONS=288} [2024-06-04 14:43:58,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-04 14:43:58,120 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 288 transitions, 3764 flow [2024-06-04 14:43:58,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:58,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:58,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:58,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:43:58,121 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 14:43:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1848308961, now seen corresponding path program 6 times [2024-06-04 14:43:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609468528] [2024-06-04 14:43:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:59,403 INFO 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 14:43:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609468528] [2024-06-04 14:43:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609468528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669893150] [2024-06-04 14:43:59,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:59,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:59,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 288 transitions, 3764 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 14:43:59,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:59,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:00,453 INFO L124 PetriNetUnfolderBase]: 3073/4822 cut-off events. [2024-06-04 14:44:00,453 INFO L125 PetriNetUnfolderBase]: For 349306/349315 co-relation queries the response was YES. [2024-06-04 14:44:00,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42532 conditions, 4822 events. 3073/4822 cut-off events. For 349306/349315 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26301 event pairs, 682 based on Foata normal form. 8/4823 useless extension candidates. Maximal degree in co-relation 42448. Up to 4042 conditions per place. [2024-06-04 14:44:00,502 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 192 selfloop transitions, 95 changer transitions 0/317 dead transitions. [2024-06-04 14:44:00,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 317 transitions, 4512 flow [2024-06-04 14:44:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:44:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:44:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:44:00,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:44:00,508 INFO L175 Difference]: Start difference. First operand has 189 places, 288 transitions, 3764 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:44:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 317 transitions, 4512 flow [2024-06-04 14:44:00,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 317 transitions, 4270 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:00,844 INFO L231 Difference]: Finished difference. Result has 190 places, 290 transitions, 3808 flow [2024-06-04 14:44:00,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3808, PETRI_PLACES=190, PETRI_TRANSITIONS=290} [2024-06-04 14:44:00,847 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-04 14:44:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 290 transitions, 3808 flow [2024-06-04 14:44:00,847 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 14:44:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:00,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:44:00,848 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:00,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1848313921, now seen corresponding path program 7 times [2024-06-04 14:44:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008000533] [2024-06-04 14:44:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:01,892 INFO 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 14:44:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008000533] [2024-06-04 14:44:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008000533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:01,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068865641] [2024-06-04 14:44:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:01,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:01,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:01,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 290 transitions, 3808 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:01,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:01,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:01,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:03,020 INFO L124 PetriNetUnfolderBase]: 3482/5326 cut-off events. [2024-06-04 14:44:03,020 INFO L125 PetriNetUnfolderBase]: For 399553/399557 co-relation queries the response was YES. [2024-06-04 14:44:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 5326 events. 3482/5326 cut-off events. For 399553/399557 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 28526 event pairs, 785 based on Foata normal form. 8/5326 useless extension candidates. Maximal degree in co-relation 47644. Up to 4064 conditions per place. [2024-06-04 14:44:03,078 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 185 selfloop transitions, 144 changer transitions 0/338 dead transitions. [2024-06-04 14:44:03,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 338 transitions, 5256 flow [2024-06-04 14:44:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 14:44:03,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-04 14:44:03,080 INFO L175 Difference]: Start difference. First operand has 190 places, 290 transitions, 3808 flow. Second operand 9 states and 177 transitions. [2024-06-04 14:44:03,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 338 transitions, 5256 flow [2024-06-04 14:44:03,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 338 transitions, 4976 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:03,423 INFO L231 Difference]: Finished difference. Result has 195 places, 301 transitions, 4283 flow [2024-06-04 14:44:03,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4283, PETRI_PLACES=195, PETRI_TRANSITIONS=301} [2024-06-04 14:44:03,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-04 14:44:03,424 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 301 transitions, 4283 flow [2024-06-04 14:44:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:03,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:03,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:03,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:44:03,425 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 14:44:03,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1070727523, now seen corresponding path program 8 times [2024-06-04 14:44:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592921317] [2024-06-04 14:44:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:03,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:04,469 INFO 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 14:44:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592921317] [2024-06-04 14:44:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592921317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:04,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:04,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196007884] [2024-06-04 14:44:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:04,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:04,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 301 transitions, 4283 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:04,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:04,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:04,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:05,555 INFO L124 PetriNetUnfolderBase]: 3500/5364 cut-off events. [2024-06-04 14:44:05,555 INFO L125 PetriNetUnfolderBase]: For 408463/408467 co-relation queries the response was YES. [2024-06-04 14:44:05,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49403 conditions, 5364 events. 3500/5364 cut-off events. For 408463/408467 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28804 event pairs, 737 based on Foata normal form. 12/5368 useless extension candidates. Maximal degree in co-relation 49315. Up to 4073 conditions per place. [2024-06-04 14:44:05,702 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 165 selfloop transitions, 165 changer transitions 0/339 dead transitions. [2024-06-04 14:44:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 339 transitions, 5359 flow [2024-06-04 14:44:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:44:05,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:44:05,703 INFO L175 Difference]: Start difference. First operand has 195 places, 301 transitions, 4283 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:44:05,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 339 transitions, 5359 flow [2024-06-04 14:44:06,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 339 transitions, 5197 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 14:44:06,046 INFO L231 Difference]: Finished difference. Result has 200 places, 304 transitions, 4579 flow [2024-06-04 14:44:06,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4579, PETRI_PLACES=200, PETRI_TRANSITIONS=304} [2024-06-04 14:44:06,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-04 14:44:06,047 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 304 transitions, 4579 flow [2024-06-04 14:44:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:06,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:06,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:44:06,050 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 14:44:06,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1429077393, now seen corresponding path program 9 times [2024-06-04 14:44:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457781571] [2024-06-04 14:44:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:07,105 INFO 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 14:44:07,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457781571] [2024-06-04 14:44:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457781571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:07,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:07,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199118056] [2024-06-04 14:44:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:07,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:07,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 304 transitions, 4579 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:07,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:07,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:07,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:08,362 INFO L124 PetriNetUnfolderBase]: 3490/5350 cut-off events. [2024-06-04 14:44:08,363 INFO L125 PetriNetUnfolderBase]: For 413080/413084 co-relation queries the response was YES. [2024-06-04 14:44:08,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49677 conditions, 5350 events. 3490/5350 cut-off events. For 413080/413084 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28777 event pairs, 740 based on Foata normal form. 8/5350 useless extension candidates. Maximal degree in co-relation 49587. Up to 4069 conditions per place. [2024-06-04 14:44:08,415 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 173 selfloop transitions, 157 changer transitions 0/339 dead transitions. [2024-06-04 14:44:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 339 transitions, 5549 flow [2024-06-04 14:44:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 14:44:08,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-04 14:44:08,417 INFO L175 Difference]: Start difference. First operand has 200 places, 304 transitions, 4579 flow. Second operand 9 states and 174 transitions. [2024-06-04 14:44:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 339 transitions, 5549 flow [2024-06-04 14:44:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 339 transitions, 5099 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:08,793 INFO L231 Difference]: Finished difference. Result has 203 places, 304 transitions, 4455 flow [2024-06-04 14:44:08,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4455, PETRI_PLACES=203, PETRI_TRANSITIONS=304} [2024-06-04 14:44:08,794 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-04 14:44:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 304 transitions, 4455 flow [2024-06-04 14:44:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:08,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:08,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:44:08,795 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:08,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -480776556, now seen corresponding path program 2 times [2024-06-04 14:44:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264488733] [2024-06-04 14:44:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:09,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264488733] [2024-06-04 14:44:09,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264488733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:44:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971475523] [2024-06-04 14:44:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:09,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:44:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:44:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:44:09,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:44:09,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 304 transitions, 4455 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:09,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:09,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:44:09,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:10,703 INFO L124 PetriNetUnfolderBase]: 3757/5640 cut-off events. [2024-06-04 14:44:10,703 INFO L125 PetriNetUnfolderBase]: For 422802/422816 co-relation queries the response was YES. [2024-06-04 14:44:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50599 conditions, 5640 events. 3757/5640 cut-off events. For 422802/422816 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29147 event pairs, 1249 based on Foata normal form. 5/5626 useless extension candidates. Maximal degree in co-relation 50508. Up to 5400 conditions per place. [2024-06-04 14:44:10,765 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 270 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-04 14:44:10,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 321 transitions, 5223 flow [2024-06-04 14:44:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:44:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:44:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-04 14:44:10,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-04 14:44:10,766 INFO L175 Difference]: Start difference. First operand has 203 places, 304 transitions, 4455 flow. Second operand 6 states and 106 transitions. [2024-06-04 14:44:10,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 321 transitions, 5223 flow [2024-06-04 14:44:11,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 321 transitions, 4941 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:11,184 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 4280 flow [2024-06-04 14:44:11,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4280, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2024-06-04 14:44:11,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-04 14:44:11,185 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 4280 flow [2024-06-04 14:44:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:11,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:11,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:11,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:44:11,185 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 14:44:11,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 454317311, now seen corresponding path program 10 times [2024-06-04 14:44:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977651126] [2024-06-04 14:44:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:12,156 INFO 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 14:44:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977651126] [2024-06-04 14:44:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977651126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:12,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186751204] [2024-06-04 14:44:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:12,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:12,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 4280 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:12,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:12,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:12,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:13,267 INFO L124 PetriNetUnfolderBase]: 3585/5511 cut-off events. [2024-06-04 14:44:13,267 INFO L125 PetriNetUnfolderBase]: For 433417/433421 co-relation queries the response was YES. [2024-06-04 14:44:13,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50324 conditions, 5511 events. 3585/5511 cut-off events. For 433417/433421 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29937 event pairs, 730 based on Foata normal form. 12/5517 useless extension candidates. Maximal degree in co-relation 50232. Up to 3778 conditions per place. [2024-06-04 14:44:13,327 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 180 selfloop transitions, 169 changer transitions 0/359 dead transitions. [2024-06-04 14:44:13,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 359 transitions, 6006 flow [2024-06-04 14:44:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:44:13,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-04 14:44:13,328 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 4280 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:44:13,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 359 transitions, 6006 flow [2024-06-04 14:44:13,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 359 transitions, 5936 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:44:13,756 INFO L231 Difference]: Finished difference. Result has 208 places, 318 transitions, 4886 flow [2024-06-04 14:44:13,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=208, PETRI_TRANSITIONS=318} [2024-06-04 14:44:13,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-04 14:44:13,757 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 318 transitions, 4886 flow [2024-06-04 14:44:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:13,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:44:13,758 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 14:44:13,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash 454310801, now seen corresponding path program 11 times [2024-06-04 14:44:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:13,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515633067] [2024-06-04 14:44:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:14,846 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 14:44:14,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:14,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515633067] [2024-06-04 14:44:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515633067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:14,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:14,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:14,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323102974] [2024-06-04 14:44:14,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:14,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:14,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 318 transitions, 4886 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:14,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:14,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:15,992 INFO L124 PetriNetUnfolderBase]: 3587/5519 cut-off events. [2024-06-04 14:44:15,993 INFO L125 PetriNetUnfolderBase]: For 437609/437613 co-relation queries the response was YES. [2024-06-04 14:44:16,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51846 conditions, 5519 events. 3587/5519 cut-off events. For 437609/437613 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30032 event pairs, 793 based on Foata normal form. 8/5523 useless extension candidates. Maximal degree in co-relation 51753. Up to 3785 conditions per place. [2024-06-04 14:44:16,051 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 181 selfloop transitions, 171 changer transitions 0/362 dead transitions. [2024-06-04 14:44:16,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 362 transitions, 6440 flow [2024-06-04 14:44:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-04 14:44:16,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-04 14:44:16,063 INFO L175 Difference]: Start difference. First operand has 208 places, 318 transitions, 4886 flow. Second operand 9 states and 185 transitions. [2024-06-04 14:44:16,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 362 transitions, 6440 flow [2024-06-04 14:44:16,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 362 transitions, 6010 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:16,551 INFO L231 Difference]: Finished difference. Result has 212 places, 321 transitions, 4918 flow [2024-06-04 14:44:16,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=212, PETRI_TRANSITIONS=321} [2024-06-04 14:44:16,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-04 14:44:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 321 transitions, 4918 flow [2024-06-04 14:44:16,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:16,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:16,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:44:16,553 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 14:44:16,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 682218461, now seen corresponding path program 12 times [2024-06-04 14:44:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338504689] [2024-06-04 14:44:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:17,659 INFO 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 14:44:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338504689] [2024-06-04 14:44:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338504689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932940631] [2024-06-04 14:44:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:17,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:17,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 321 transitions, 4918 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:17,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:17,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:17,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:18,875 INFO L124 PetriNetUnfolderBase]: 3737/5752 cut-off events. [2024-06-04 14:44:18,875 INFO L125 PetriNetUnfolderBase]: For 474130/474134 co-relation queries the response was YES. [2024-06-04 14:44:18,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54462 conditions, 5752 events. 3737/5752 cut-off events. For 474130/474134 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31564 event pairs, 686 based on Foata normal form. 12/5758 useless extension candidates. Maximal degree in co-relation 54368. Up to 3873 conditions per place. [2024-06-04 14:44:18,930 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 168 selfloop transitions, 192 changer transitions 0/370 dead transitions. [2024-06-04 14:44:18,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 370 transitions, 6622 flow [2024-06-04 14:44:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 14:44:18,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-04 14:44:18,931 INFO L175 Difference]: Start difference. First operand has 212 places, 321 transitions, 4918 flow. Second operand 9 states and 183 transitions. [2024-06-04 14:44:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 370 transitions, 6622 flow [2024-06-04 14:44:19,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 370 transitions, 6226 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:19,337 INFO L231 Difference]: Finished difference. Result has 217 places, 329 transitions, 5155 flow [2024-06-04 14:44:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5155, PETRI_PLACES=217, PETRI_TRANSITIONS=329} [2024-06-04 14:44:19,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-04 14:44:19,337 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 329 transitions, 5155 flow [2024-06-04 14:44:19,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:44:19,338 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 14:44:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 682211951, now seen corresponding path program 13 times [2024-06-04 14:44:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11186432] [2024-06-04 14:44:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:20,386 INFO 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 14:44:20,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:20,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11186432] [2024-06-04 14:44:20,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11186432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:20,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:20,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:20,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131357214] [2024-06-04 14:44:20,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:20,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:20,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:20,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:20,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 329 transitions, 5155 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:20,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:20,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:20,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:21,870 INFO L124 PetriNetUnfolderBase]: 3759/5784 cut-off events. [2024-06-04 14:44:21,871 INFO L125 PetriNetUnfolderBase]: For 491043/491047 co-relation queries the response was YES. [2024-06-04 14:44:21,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55502 conditions, 5784 events. 3759/5784 cut-off events. For 491043/491047 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31751 event pairs, 681 based on Foata normal form. 8/5786 useless extension candidates. Maximal degree in co-relation 55406. Up to 3896 conditions per place. [2024-06-04 14:44:21,969 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 164 selfloop transitions, 201 changer transitions 0/375 dead transitions. [2024-06-04 14:44:21,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 375 transitions, 6838 flow [2024-06-04 14:44:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 14:44:21,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-04 14:44:21,971 INFO L175 Difference]: Start difference. First operand has 217 places, 329 transitions, 5155 flow. Second operand 9 states and 182 transitions. [2024-06-04 14:44:21,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 375 transitions, 6838 flow [2024-06-04 14:44:22,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 375 transitions, 6303 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:22,722 INFO L231 Difference]: Finished difference. Result has 221 places, 337 transitions, 5330 flow [2024-06-04 14:44:22,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5330, PETRI_PLACES=221, PETRI_TRANSITIONS=337} [2024-06-04 14:44:22,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-04 14:44:22,723 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 337 transitions, 5330 flow [2024-06-04 14:44:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:22,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:44:22,723 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 14:44:22,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash 708186137, now seen corresponding path program 7 times [2024-06-04 14:44:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103995994] [2024-06-04 14:44:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:23,958 INFO 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 14:44:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103995994] [2024-06-04 14:44:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103995994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902997935] [2024-06-04 14:44:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:24,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 337 transitions, 5330 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 14:44:24,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:24,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:24,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:25,123 INFO L124 PetriNetUnfolderBase]: 3498/5479 cut-off events. [2024-06-04 14:44:25,123 INFO L125 PetriNetUnfolderBase]: For 509612/509636 co-relation queries the response was YES. [2024-06-04 14:44:25,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54472 conditions, 5479 events. 3498/5479 cut-off events. For 509612/509636 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 30794 event pairs, 699 based on Foata normal form. 8/5453 useless extension candidates. Maximal degree in co-relation 54373. Up to 4656 conditions per place. [2024-06-04 14:44:25,190 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 235 selfloop transitions, 98 changer transitions 0/364 dead transitions. [2024-06-04 14:44:25,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 364 transitions, 6164 flow [2024-06-04 14:44:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:44:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:44:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 14:44:25,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-04 14:44:25,192 INFO L175 Difference]: Start difference. First operand has 221 places, 337 transitions, 5330 flow. Second operand 8 states and 155 transitions. [2024-06-04 14:44:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 364 transitions, 6164 flow [2024-06-04 14:44:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 364 transitions, 5699 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:25,785 INFO L231 Difference]: Finished difference. Result has 224 places, 339 transitions, 5154 flow [2024-06-04 14:44:25,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5154, PETRI_PLACES=224, PETRI_TRANSITIONS=339} [2024-06-04 14:44:25,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-04 14:44:25,786 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 339 transitions, 5154 flow [2024-06-04 14:44:25,786 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 14:44:25,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:25,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:25,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:44:25,786 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 14:44:25,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash 454137821, now seen corresponding path program 14 times [2024-06-04 14:44:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003012568] [2024-06-04 14:44:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:25,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003012568] [2024-06-04 14:44:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003012568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:26,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572334825] [2024-06-04 14:44:26,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 339 transitions, 5154 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:28,033 INFO L124 PetriNetUnfolderBase]: 3741/5758 cut-off events. [2024-06-04 14:44:28,033 INFO L125 PetriNetUnfolderBase]: For 518291/518295 co-relation queries the response was YES. [2024-06-04 14:44:28,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55111 conditions, 5758 events. 3741/5758 cut-off events. For 518291/518295 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 31592 event pairs, 736 based on Foata normal form. 8/5760 useless extension candidates. Maximal degree in co-relation 55011. Up to 3880 conditions per place. [2024-06-04 14:44:28,099 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 177 selfloop transitions, 193 changer transitions 0/380 dead transitions. [2024-06-04 14:44:28,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 380 transitions, 6724 flow [2024-06-04 14:44:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 14:44:28,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-04 14:44:28,101 INFO L175 Difference]: Start difference. First operand has 224 places, 339 transitions, 5154 flow. Second operand 9 states and 183 transitions. [2024-06-04 14:44:28,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 380 transitions, 6724 flow [2024-06-04 14:44:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 380 transitions, 6453 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:28,710 INFO L231 Difference]: Finished difference. Result has 227 places, 342 transitions, 5385 flow [2024-06-04 14:44:28,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5385, PETRI_PLACES=227, PETRI_TRANSITIONS=342} [2024-06-04 14:44:28,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-04 14:44:28,711 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 342 transitions, 5385 flow [2024-06-04 14:44:28,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:28,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:28,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:28,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:44:28,712 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:28,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 714857337, now seen corresponding path program 15 times [2024-06-04 14:44:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528386480] [2024-06-04 14:44:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:29,750 INFO 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 14:44:29,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:29,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528386480] [2024-06-04 14:44:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528386480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:29,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818347230] [2024-06-04 14:44:29,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:29,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:29,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:29,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 342 transitions, 5385 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:29,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:29,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:30,948 INFO L124 PetriNetUnfolderBase]: 3718/5723 cut-off events. [2024-06-04 14:44:30,948 INFO L125 PetriNetUnfolderBase]: For 533391/533395 co-relation queries the response was YES. [2024-06-04 14:44:30,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55202 conditions, 5723 events. 3718/5723 cut-off events. For 533391/533395 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 31360 event pairs, 666 based on Foata normal form. 16/5733 useless extension candidates. Maximal degree in co-relation 55101. Up to 3867 conditions per place. [2024-06-04 14:44:31,015 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 216 changer transitions 0/378 dead transitions. [2024-06-04 14:44:31,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 378 transitions, 6661 flow [2024-06-04 14:44:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:44:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:44:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:44:31,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-04 14:44:31,017 INFO L175 Difference]: Start difference. First operand has 227 places, 342 transitions, 5385 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:44:31,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 378 transitions, 6661 flow [2024-06-04 14:44:31,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 378 transitions, 6140 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:31,714 INFO L231 Difference]: Finished difference. Result has 230 places, 342 transitions, 5306 flow [2024-06-04 14:44:31,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5306, PETRI_PLACES=230, PETRI_TRANSITIONS=342} [2024-06-04 14:44:31,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-04 14:44:31,715 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 342 transitions, 5306 flow [2024-06-04 14:44:31,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:31,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:31,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:31,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:44:31,716 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 14:44:31,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash -814342786, now seen corresponding path program 3 times [2024-06-04 14:44:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:31,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044352788] [2024-06-04 14:44:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:32,407 INFO 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 14:44:32,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:32,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044352788] [2024-06-04 14:44:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044352788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:32,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:32,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:44:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393298723] [2024-06-04 14:44:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:32,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:44:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:44:32,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:44:32,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:44:32,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 342 transitions, 5306 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:32,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:32,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:44:32,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:33,610 INFO L124 PetriNetUnfolderBase]: 4097/6143 cut-off events. [2024-06-04 14:44:33,610 INFO L125 PetriNetUnfolderBase]: For 545470/545498 co-relation queries the response was YES. [2024-06-04 14:44:33,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56835 conditions, 6143 events. 4097/6143 cut-off events. For 545470/545498 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32151 event pairs, 1278 based on Foata normal form. 9/6119 useless extension candidates. Maximal degree in co-relation 56733. Up to 5902 conditions per place. [2024-06-04 14:44:33,683 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 26 changer transitions 0/350 dead transitions. [2024-06-04 14:44:33,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 5982 flow [2024-06-04 14:44:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:44:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:44:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 14:44:33,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:44:33,685 INFO L175 Difference]: Start difference. First operand has 230 places, 342 transitions, 5306 flow. Second operand 6 states and 99 transitions. [2024-06-04 14:44:33,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 5982 flow [2024-06-04 14:44:34,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 350 transitions, 5498 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:34,353 INFO L231 Difference]: Finished difference. Result has 228 places, 342 transitions, 4880 flow [2024-06-04 14:44:34,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4880, PETRI_PLACES=228, PETRI_TRANSITIONS=342} [2024-06-04 14:44:34,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-04 14:44:34,354 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 342 transitions, 4880 flow [2024-06-04 14:44:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:34,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:34,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:44:34,355 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 14:44:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash 667436776, now seen corresponding path program 1 times [2024-06-04 14:44:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941248735] [2024-06-04 14:44:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941248735] [2024-06-04 14:44:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941248735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:44:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241990769] [2024-06-04 14:44:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:44:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:44:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:44:35,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 342 transitions, 4880 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:35,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:35,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:35,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:36,224 INFO L124 PetriNetUnfolderBase]: 3776/5791 cut-off events. [2024-06-04 14:44:36,224 INFO L125 PetriNetUnfolderBase]: For 485868/485897 co-relation queries the response was YES. [2024-06-04 14:44:36,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51088 conditions, 5791 events. 3776/5791 cut-off events. For 485868/485897 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 31344 event pairs, 1320 based on Foata normal form. 10/5756 useless extension candidates. Maximal degree in co-relation 50985. Up to 5462 conditions per place. [2024-06-04 14:44:36,295 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 318 selfloop transitions, 17 changer transitions 0/360 dead transitions. [2024-06-04 14:44:36,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 360 transitions, 5788 flow [2024-06-04 14:44:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:44:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:44:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 14:44:36,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:44:36,297 INFO L175 Difference]: Start difference. First operand has 228 places, 342 transitions, 4880 flow. Second operand 6 states and 108 transitions. [2024-06-04 14:44:36,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 360 transitions, 5788 flow [2024-06-04 14:44:36,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 360 transitions, 5716 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:36,861 INFO L231 Difference]: Finished difference. Result has 229 places, 348 transitions, 4950 flow [2024-06-04 14:44:36,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4950, PETRI_PLACES=229, PETRI_TRANSITIONS=348} [2024-06-04 14:44:36,862 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-04 14:44:36,862 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 348 transitions, 4950 flow [2024-06-04 14:44:36,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:36,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:36,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:36,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:44:36,863 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:36,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 690800501, now seen corresponding path program 1 times [2024-06-04 14:44:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224515611] [2024-06-04 14:44:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:36,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:38,240 INFO 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 14:44:38,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:38,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224515611] [2024-06-04 14:44:38,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224515611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:38,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:38,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:38,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140100411] [2024-06-04 14:44:38,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:38,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:38,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:38,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 348 transitions, 4950 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:38,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:38,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:39,595 INFO L124 PetriNetUnfolderBase]: 3851/5879 cut-off events. [2024-06-04 14:44:39,595 INFO L125 PetriNetUnfolderBase]: For 521304/521315 co-relation queries the response was YES. [2024-06-04 14:44:39,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52343 conditions, 5879 events. 3851/5879 cut-off events. For 521304/521315 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 31498 event pairs, 1326 based on Foata normal form. 4/5849 useless extension candidates. Maximal degree in co-relation 52239. Up to 5544 conditions per place. [2024-06-04 14:44:39,662 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 23 changer transitions 0/381 dead transitions. [2024-06-04 14:44:39,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 381 transitions, 5874 flow [2024-06-04 14:44:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 14:44:39,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-04 14:44:39,664 INFO L175 Difference]: Start difference. First operand has 229 places, 348 transitions, 4950 flow. Second operand 10 states and 173 transitions. [2024-06-04 14:44:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 381 transitions, 5874 flow [2024-06-04 14:44:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 381 transitions, 5819 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 14:44:40,218 INFO L231 Difference]: Finished difference. Result has 237 places, 350 transitions, 5030 flow [2024-06-04 14:44:40,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5030, PETRI_PLACES=237, PETRI_TRANSITIONS=350} [2024-06-04 14:44:40,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-04 14:44:40,219 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 350 transitions, 5030 flow [2024-06-04 14:44:40,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:40,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:40,219 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 14:44:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:44:40,219 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 14:44:40,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1940676336, now seen corresponding path program 1 times [2024-06-04 14:44:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091346439] [2024-06-04 14:44:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:41,025 INFO 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 14:44:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091346439] [2024-06-04 14:44:41,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091346439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:41,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:41,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:44:41,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805408673] [2024-06-04 14:44:41,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:41,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:44:41,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:44:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:44:41,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:44:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 350 transitions, 5030 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:44:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:41,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:44:41,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:42,354 INFO L124 PetriNetUnfolderBase]: 4099/6143 cut-off events. [2024-06-04 14:44:42,355 INFO L125 PetriNetUnfolderBase]: For 589024/589048 co-relation queries the response was YES. [2024-06-04 14:44:42,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56833 conditions, 6143 events. 4099/6143 cut-off events. For 589024/589048 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32121 event pairs, 1279 based on Foata normal form. 5/6115 useless extension candidates. Maximal degree in co-relation 56727. Up to 5890 conditions per place. [2024-06-04 14:44:42,427 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 316 selfloop transitions, 34 changer transitions 0/374 dead transitions. [2024-06-04 14:44:42,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 374 transitions, 5986 flow [2024-06-04 14:44:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:44:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:44:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:44:42,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-04 14:44:42,429 INFO L175 Difference]: Start difference. First operand has 237 places, 350 transitions, 5030 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:44:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 374 transitions, 5986 flow [2024-06-04 14:44:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 5869 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:43,071 INFO L231 Difference]: Finished difference. Result has 237 places, 359 transitions, 5109 flow [2024-06-04 14:44:43,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5109, PETRI_PLACES=237, PETRI_TRANSITIONS=359} [2024-06-04 14:44:43,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-04 14:44:43,071 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 359 transitions, 5109 flow [2024-06-04 14:44:43,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:44:43,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:43,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:44:43,072 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 14:44:43,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 563032566, now seen corresponding path program 2 times [2024-06-04 14:44:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:43,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043848532] [2024-06-04 14:44:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:43,805 INFO 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 14:44:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043848532] [2024-06-04 14:44:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043848532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:43,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:43,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:44:43,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271706039] [2024-06-04 14:44:43,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:43,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:44:43,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:44:43,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:44:43,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:43,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 359 transitions, 5109 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:43,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:43,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:44,935 INFO L124 PetriNetUnfolderBase]: 3840/5867 cut-off events. [2024-06-04 14:44:44,935 INFO L125 PetriNetUnfolderBase]: For 534026/534055 co-relation queries the response was YES. [2024-06-04 14:44:44,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53204 conditions, 5867 events. 3840/5867 cut-off events. For 534026/534055 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 31641 event pairs, 1316 based on Foata normal form. 10/5824 useless extension candidates. Maximal degree in co-relation 53096. Up to 5548 conditions per place. [2024-06-04 14:44:45,002 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 327 selfloop transitions, 12 changer transitions 0/367 dead transitions. [2024-06-04 14:44:45,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 367 transitions, 5811 flow [2024-06-04 14:44:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:44:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:44:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 14:44:45,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:44:45,003 INFO L175 Difference]: Start difference. First operand has 237 places, 359 transitions, 5109 flow. Second operand 6 states and 102 transitions. [2024-06-04 14:44:45,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 367 transitions, 5811 flow [2024-06-04 14:44:45,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 367 transitions, 5716 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-04 14:44:45,664 INFO L231 Difference]: Finished difference. Result has 241 places, 359 transitions, 5044 flow [2024-06-04 14:44:45,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5044, PETRI_PLACES=241, PETRI_TRANSITIONS=359} [2024-06-04 14:44:45,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-04 14:44:45,665 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 359 transitions, 5044 flow [2024-06-04 14:44:45,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:45,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:45,665 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 14:44:45,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:44:45,666 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:45,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1606487841, now seen corresponding path program 1 times [2024-06-04 14:44:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:45,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397611775] [2024-06-04 14:44:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:46,767 INFO 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 14:44:46,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397611775] [2024-06-04 14:44:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397611775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:46,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:46,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:46,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807151138] [2024-06-04 14:44:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:46,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:46,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:46,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 359 transitions, 5044 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:46,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:46,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:46,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:48,102 INFO L124 PetriNetUnfolderBase]: 3829/5886 cut-off events. [2024-06-04 14:44:48,102 INFO L125 PetriNetUnfolderBase]: For 670010/670032 co-relation queries the response was YES. [2024-06-04 14:44:48,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58020 conditions, 5886 events. 3829/5886 cut-off events. For 670010/670032 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32509 event pairs, 828 based on Foata normal form. 12/5870 useless extension candidates. Maximal degree in co-relation 57909. Up to 5346 conditions per place. [2024-06-04 14:44:48,175 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 335 selfloop transitions, 57 changer transitions 0/404 dead transitions. [2024-06-04 14:44:48,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 404 transitions, 6048 flow [2024-06-04 14:44:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 14:44:48,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113636363636364 [2024-06-04 14:44:48,177 INFO L175 Difference]: Start difference. First operand has 241 places, 359 transitions, 5044 flow. Second operand 10 states and 181 transitions. [2024-06-04 14:44:48,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 404 transitions, 6048 flow [2024-06-04 14:44:48,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 404 transitions, 6016 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:48,782 INFO L231 Difference]: Finished difference. Result has 248 places, 366 transitions, 5255 flow [2024-06-04 14:44:48,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5255, PETRI_PLACES=248, PETRI_TRANSITIONS=366} [2024-06-04 14:44:48,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-04 14:44:48,783 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 366 transitions, 5255 flow [2024-06-04 14:44:48,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:48,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:48,783 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 14:44:48,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:44:48,783 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:48,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2079769865, now seen corresponding path program 2 times [2024-06-04 14:44:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:48,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512347162] [2024-06-04 14:44:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:49,844 INFO 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 14:44:49,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512347162] [2024-06-04 14:44:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512347162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:49,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:49,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127411103] [2024-06-04 14:44:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:50,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:50,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 366 transitions, 5255 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:50,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:50,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:50,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:51,272 INFO L124 PetriNetUnfolderBase]: 3873/5974 cut-off events. [2024-06-04 14:44:51,272 INFO L125 PetriNetUnfolderBase]: For 659669/659685 co-relation queries the response was YES. [2024-06-04 14:44:51,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58619 conditions, 5974 events. 3873/5974 cut-off events. For 659669/659685 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33169 event pairs, 1038 based on Foata normal form. 12/5968 useless extension candidates. Maximal degree in co-relation 58505. Up to 5422 conditions per place. [2024-06-04 14:44:51,351 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 339 selfloop transitions, 65 changer transitions 0/416 dead transitions. [2024-06-04 14:44:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 416 transitions, 6416 flow [2024-06-04 14:44:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-04 14:44:51,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-04 14:44:51,367 INFO L175 Difference]: Start difference. First operand has 248 places, 366 transitions, 5255 flow. Second operand 10 states and 183 transitions. [2024-06-04 14:44:51,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 416 transitions, 6416 flow [2024-06-04 14:44:52,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 416 transitions, 6146 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:52,323 INFO L231 Difference]: Finished difference. Result has 253 places, 378 transitions, 5382 flow [2024-06-04 14:44:52,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5382, PETRI_PLACES=253, PETRI_TRANSITIONS=378} [2024-06-04 14:44:52,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-04 14:44:52,324 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 378 transitions, 5382 flow [2024-06-04 14:44:52,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:52,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:52,324 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 14:44:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:44:52,324 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 14:44:52,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash -30871305, now seen corresponding path program 3 times [2024-06-04 14:44:52,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:52,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838399591] [2024-06-04 14:44:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:53,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838399591] [2024-06-04 14:44:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838399591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:53,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:53,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241319627] [2024-06-04 14:44:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:53,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:53,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 378 transitions, 5382 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:53,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:53,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:53,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:55,043 INFO L124 PetriNetUnfolderBase]: 3914/6028 cut-off events. [2024-06-04 14:44:55,043 INFO L125 PetriNetUnfolderBase]: For 701864/701882 co-relation queries the response was YES. [2024-06-04 14:44:55,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59852 conditions, 6028 events. 3914/6028 cut-off events. For 701864/701882 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33486 event pairs, 976 based on Foata normal form. 8/6009 useless extension candidates. Maximal degree in co-relation 59736. Up to 5363 conditions per place. [2024-06-04 14:44:55,115 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 322 selfloop transitions, 87 changer transitions 0/421 dead transitions. [2024-06-04 14:44:55,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 421 transitions, 6720 flow [2024-06-04 14:44:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:44:55,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:44:55,117 INFO L175 Difference]: Start difference. First operand has 253 places, 378 transitions, 5382 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:44:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 421 transitions, 6720 flow [2024-06-04 14:44:56,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 421 transitions, 6539 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:56,057 INFO L231 Difference]: Finished difference. Result has 257 places, 382 transitions, 5552 flow [2024-06-04 14:44:56,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5552, PETRI_PLACES=257, PETRI_TRANSITIONS=382} [2024-06-04 14:44:56,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-04 14:44:56,058 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 382 transitions, 5552 flow [2024-06-04 14:44:56,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:56,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:56,058 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 14:44:56,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:44:56,058 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 14:44:56,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash -29824900, now seen corresponding path program 1 times [2024-06-04 14:44:56,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211782079] [2024-06-04 14:44:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:57,276 INFO 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 14:44:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:57,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211782079] [2024-06-04 14:44:57,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211782079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:57,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:57,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500976869] [2024-06-04 14:44:57,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:57,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:57,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 382 transitions, 5552 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:57,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:57,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:57,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:58,664 INFO L124 PetriNetUnfolderBase]: 3925/6068 cut-off events. [2024-06-04 14:44:58,664 INFO L125 PetriNetUnfolderBase]: For 721420/721438 co-relation queries the response was YES. [2024-06-04 14:44:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60620 conditions, 6068 events. 3925/6068 cut-off events. For 721420/721438 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33983 event pairs, 965 based on Foata normal form. 6/6052 useless extension candidates. Maximal degree in co-relation 60503. Up to 5450 conditions per place. [2024-06-04 14:44:58,741 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 318 selfloop transitions, 92 changer transitions 0/422 dead transitions. [2024-06-04 14:44:58,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 422 transitions, 6626 flow [2024-06-04 14:44:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 14:44:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:44:58,743 INFO L175 Difference]: Start difference. First operand has 257 places, 382 transitions, 5552 flow. Second operand 10 states and 185 transitions. [2024-06-04 14:44:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 422 transitions, 6626 flow [2024-06-04 14:44:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 422 transitions, 6464 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:59,769 INFO L231 Difference]: Finished difference. Result has 262 places, 385 transitions, 5713 flow [2024-06-04 14:44:59,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5713, PETRI_PLACES=262, PETRI_TRANSITIONS=385} [2024-06-04 14:44:59,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-04 14:44:59,770 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 385 transitions, 5713 flow [2024-06-04 14:44:59,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:44:59,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:59,770 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 14:44:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:44:59,770 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 14:44:59,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash -29829705, now seen corresponding path program 4 times [2024-06-04 14:44:59,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:59,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205626451] [2024-06-04 14:44:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:59,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:00,938 INFO 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 14:45:00,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:00,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205626451] [2024-06-04 14:45:00,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205626451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:00,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:00,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:00,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654661715] [2024-06-04 14:45:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:00,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:01,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:01,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 385 transitions, 5713 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:01,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:01,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:01,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:02,340 INFO L124 PetriNetUnfolderBase]: 3917/6043 cut-off events. [2024-06-04 14:45:02,340 INFO L125 PetriNetUnfolderBase]: For 740471/740489 co-relation queries the response was YES. [2024-06-04 14:45:02,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60928 conditions, 6043 events. 3917/6043 cut-off events. For 740471/740489 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33698 event pairs, 969 based on Foata normal form. 8/6024 useless extension candidates. Maximal degree in co-relation 60809. Up to 5457 conditions per place. [2024-06-04 14:45:02,416 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 325 selfloop transitions, 85 changer transitions 0/422 dead transitions. [2024-06-04 14:45:02,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 422 transitions, 6669 flow [2024-06-04 14:45:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:45:02,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:45:02,417 INFO L175 Difference]: Start difference. First operand has 262 places, 385 transitions, 5713 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:45:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 422 transitions, 6669 flow [2024-06-04 14:45:03,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 422 transitions, 6366 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:03,418 INFO L231 Difference]: Finished difference. Result has 264 places, 385 transitions, 5590 flow [2024-06-04 14:45:03,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5590, PETRI_PLACES=264, PETRI_TRANSITIONS=385} [2024-06-04 14:45:03,418 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-04 14:45:03,418 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 385 transitions, 5590 flow [2024-06-04 14:45:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:03,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:03,419 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 14:45:03,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:45:03,419 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:03,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1493824698, now seen corresponding path program 1 times [2024-06-04 14:45:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:03,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884850895] [2024-06-04 14:45:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:03,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:04,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884850895] [2024-06-04 14:45:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884850895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:04,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:04,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:04,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105727315] [2024-06-04 14:45:04,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:04,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:45:04,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 385 transitions, 5590 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:04,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:04,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:45:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:05,408 INFO L124 PetriNetUnfolderBase]: 4322/6501 cut-off events. [2024-06-04 14:45:05,408 INFO L125 PetriNetUnfolderBase]: For 734455/734489 co-relation queries the response was YES. [2024-06-04 14:45:05,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62309 conditions, 6501 events. 4322/6501 cut-off events. For 734455/734489 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34495 event pairs, 1059 based on Foata normal form. 16/6484 useless extension candidates. Maximal degree in co-relation 62189. Up to 6059 conditions per place. [2024-06-04 14:45:05,490 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 331 selfloop transitions, 69 changer transitions 0/429 dead transitions. [2024-06-04 14:45:05,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 429 transitions, 7020 flow [2024-06-04 14:45:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:45:05,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-04 14:45:05,491 INFO L175 Difference]: Start difference. First operand has 264 places, 385 transitions, 5590 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:45:05,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 429 transitions, 7020 flow [2024-06-04 14:45:06,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 429 transitions, 6814 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:45:06,543 INFO L231 Difference]: Finished difference. Result has 265 places, 403 transitions, 5881 flow [2024-06-04 14:45:06,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5881, PETRI_PLACES=265, PETRI_TRANSITIONS=403} [2024-06-04 14:45:06,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-04 14:45:06,544 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 403 transitions, 5881 flow [2024-06-04 14:45:06,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:06,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:06,544 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 14:45:06,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:45:06,544 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 14:45:06,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash -615435755, now seen corresponding path program 5 times [2024-06-04 14:45:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:06,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004416671] [2024-06-04 14:45:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:07,724 INFO 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 14:45:07,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004416671] [2024-06-04 14:45:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004416671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:07,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:07,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:07,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824554337] [2024-06-04 14:45:07,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:07,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:07,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:07,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:07,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 403 transitions, 5881 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:07,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:09,319 INFO L124 PetriNetUnfolderBase]: 4082/6301 cut-off events. [2024-06-04 14:45:09,319 INFO L125 PetriNetUnfolderBase]: For 753411/753421 co-relation queries the response was YES. [2024-06-04 14:45:09,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63100 conditions, 6301 events. 4082/6301 cut-off events. For 753411/753421 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35245 event pairs, 813 based on Foata normal form. 14/6315 useless extension candidates. Maximal degree in co-relation 62977. Up to 5686 conditions per place. [2024-06-04 14:45:09,393 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 364 selfloop transitions, 78 changer transitions 0/457 dead transitions. [2024-06-04 14:45:09,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 457 transitions, 7100 flow [2024-06-04 14:45:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:45:09,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:45:09,395 INFO L175 Difference]: Start difference. First operand has 265 places, 403 transitions, 5881 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:45:09,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 457 transitions, 7100 flow [2024-06-04 14:45:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 457 transitions, 7039 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 14:45:10,191 INFO L231 Difference]: Finished difference. Result has 275 places, 421 transitions, 6256 flow [2024-06-04 14:45:10,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6256, PETRI_PLACES=275, PETRI_TRANSITIONS=421} [2024-06-04 14:45:10,192 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-04 14:45:10,192 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 421 transitions, 6256 flow [2024-06-04 14:45:10,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:10,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:10,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:10,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:45:10,193 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:10,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash 424193813, now seen corresponding path program 6 times [2024-06-04 14:45:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:10,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740125868] [2024-06-04 14:45:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:11,614 INFO 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 14:45:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740125868] [2024-06-04 14:45:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740125868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:11,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:11,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082535092] [2024-06-04 14:45:11,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:11,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:11,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:11,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 421 transitions, 6256 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:11,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:11,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:13,225 INFO L124 PetriNetUnfolderBase]: 4110/6338 cut-off events. [2024-06-04 14:45:13,225 INFO L125 PetriNetUnfolderBase]: For 779239/779249 co-relation queries the response was YES. [2024-06-04 14:45:13,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 6338 events. 4110/6338 cut-off events. For 779239/779249 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 35412 event pairs, 830 based on Foata normal form. 14/6345 useless extension candidates. Maximal degree in co-relation 64230. Up to 5718 conditions per place. [2024-06-04 14:45:13,306 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 351 selfloop transitions, 94 changer transitions 0/460 dead transitions. [2024-06-04 14:45:13,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 460 transitions, 7376 flow [2024-06-04 14:45:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 14:45:13,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:45:13,308 INFO L175 Difference]: Start difference. First operand has 275 places, 421 transitions, 6256 flow. Second operand 10 states and 185 transitions. [2024-06-04 14:45:13,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 460 transitions, 7376 flow [2024-06-04 14:45:14,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 460 transitions, 7194 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 14:45:14,295 INFO L231 Difference]: Finished difference. Result has 280 places, 425 transitions, 6382 flow [2024-06-04 14:45:14,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6382, PETRI_PLACES=280, PETRI_TRANSITIONS=425} [2024-06-04 14:45:14,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-04 14:45:14,296 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 425 transitions, 6382 flow [2024-06-04 14:45:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:14,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:14,296 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 14:45:14,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:45:14,297 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1841461588, now seen corresponding path program 2 times [2024-06-04 14:45:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474167141] [2024-06-04 14:45:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:15,547 INFO 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 14:45:15,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:15,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474167141] [2024-06-04 14:45:15,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474167141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:15,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:15,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117653177] [2024-06-04 14:45:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:15,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:15,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 425 transitions, 6382 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:15,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:15,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:15,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:16,991 INFO L124 PetriNetUnfolderBase]: 4112/6355 cut-off events. [2024-06-04 14:45:16,991 INFO L125 PetriNetUnfolderBase]: For 793315/793325 co-relation queries the response was YES. [2024-06-04 14:45:17,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64714 conditions, 6355 events. 4112/6355 cut-off events. For 793315/793325 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35662 event pairs, 830 based on Foata normal form. 12/6367 useless extension candidates. Maximal degree in co-relation 64586. Up to 5707 conditions per place. [2024-06-04 14:45:17,075 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 349 selfloop transitions, 102 changer transitions 0/466 dead transitions. [2024-06-04 14:45:17,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 466 transitions, 7588 flow [2024-06-04 14:45:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:45:17,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-04 14:45:17,077 INFO L175 Difference]: Start difference. First operand has 280 places, 425 transitions, 6382 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:45:17,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 466 transitions, 7588 flow [2024-06-04 14:45:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 466 transitions, 7326 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:18,103 INFO L231 Difference]: Finished difference. Result has 282 places, 431 transitions, 6526 flow [2024-06-04 14:45:18,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=282, PETRI_TRANSITIONS=431} [2024-06-04 14:45:18,112 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-04 14:45:18,112 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 431 transitions, 6526 flow [2024-06-04 14:45:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:18,116 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 14:45:18,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:45:18,116 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:18,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 341073203, now seen corresponding path program 7 times [2024-06-04 14:45:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:18,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566070535] [2024-06-04 14:45:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:18,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:19,428 INFO 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 14:45:19,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566070535] [2024-06-04 14:45:19,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566070535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:19,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:19,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:19,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35802515] [2024-06-04 14:45:19,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:19,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:19,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:19,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:19,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 431 transitions, 6526 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:19,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:19,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:19,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:21,138 INFO L124 PetriNetUnfolderBase]: 4140/6385 cut-off events. [2024-06-04 14:45:21,138 INFO L125 PetriNetUnfolderBase]: For 823175/823185 co-relation queries the response was YES. [2024-06-04 14:45:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65508 conditions, 6385 events. 4140/6385 cut-off events. For 823175/823185 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35736 event pairs, 831 based on Foata normal form. 14/6391 useless extension candidates. Maximal degree in co-relation 65379. Up to 5674 conditions per place. [2024-06-04 14:45:21,217 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 357 selfloop transitions, 98 changer transitions 0/470 dead transitions. [2024-06-04 14:45:21,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 470 transitions, 7666 flow [2024-06-04 14:45:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:45:21,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-04 14:45:21,219 INFO L175 Difference]: Start difference. First operand has 282 places, 431 transitions, 6526 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:45:21,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 470 transitions, 7666 flow [2024-06-04 14:45:22,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 470 transitions, 7384 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-04 14:45:22,265 INFO L231 Difference]: Finished difference. Result has 283 places, 435 transitions, 6563 flow [2024-06-04 14:45:22,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6563, PETRI_PLACES=283, PETRI_TRANSITIONS=435} [2024-06-04 14:45:22,267 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-04 14:45:22,267 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 435 transitions, 6563 flow [2024-06-04 14:45:22,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:22,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:22,267 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 14:45:22,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:45:22,267 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 14:45:22,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2127317253, now seen corresponding path program 8 times [2024-06-04 14:45:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:22,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532789203] [2024-06-04 14:45:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:23,464 INFO 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 14:45:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532789203] [2024-06-04 14:45:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532789203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:23,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575800566] [2024-06-04 14:45:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:23,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:23,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 435 transitions, 6563 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:23,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:23,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:25,153 INFO L124 PetriNetUnfolderBase]: 4157/6418 cut-off events. [2024-06-04 14:45:25,153 INFO L125 PetriNetUnfolderBase]: For 848425/848437 co-relation queries the response was YES. [2024-06-04 14:45:25,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66269 conditions, 6418 events. 4157/6418 cut-off events. For 848425/848437 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 35986 event pairs, 806 based on Foata normal form. 16/6429 useless extension candidates. Maximal degree in co-relation 66139. Up to 5639 conditions per place. [2024-06-04 14:45:25,243 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 336 selfloop transitions, 122 changer transitions 0/473 dead transitions. [2024-06-04 14:45:25,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 473 transitions, 7717 flow [2024-06-04 14:45:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:45:25,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-04 14:45:25,245 INFO L175 Difference]: Start difference. First operand has 283 places, 435 transitions, 6563 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:45:25,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 473 transitions, 7717 flow [2024-06-04 14:45:26,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 473 transitions, 7442 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:26,608 INFO L231 Difference]: Finished difference. Result has 285 places, 437 transitions, 6641 flow [2024-06-04 14:45:26,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6641, PETRI_PLACES=285, PETRI_TRANSITIONS=437} [2024-06-04 14:45:26,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-04 14:45:26,609 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 437 transitions, 6641 flow [2024-06-04 14:45:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:26,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:26,609 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 14:45:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:45:26,609 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 14:45:26,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -287450282, now seen corresponding path program 1 times [2024-06-04 14:45:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572638396] [2024-06-04 14:45:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:27,876 INFO 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 14:45:27,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:27,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572638396] [2024-06-04 14:45:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572638396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:27,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448747106] [2024-06-04 14:45:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:28,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:45:28,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 437 transitions, 6641 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:45:28,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:28,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:45:28,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:29,528 INFO L124 PetriNetUnfolderBase]: 4596/6898 cut-off events. [2024-06-04 14:45:29,528 INFO L125 PetriNetUnfolderBase]: For 869307/869319 co-relation queries the response was YES. [2024-06-04 14:45:29,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67959 conditions, 6898 events. 4596/6898 cut-off events. For 869307/869319 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36765 event pairs, 872 based on Foata normal form. 18/6916 useless extension candidates. Maximal degree in co-relation 67828. Up to 5884 conditions per place. [2024-06-04 14:45:29,629 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 317 selfloop transitions, 172 changer transitions 0/502 dead transitions. [2024-06-04 14:45:29,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 502 transitions, 8178 flow [2024-06-04 14:45:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:45:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:45:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-04 14:45:29,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40702479338842973 [2024-06-04 14:45:29,630 INFO L175 Difference]: Start difference. First operand has 285 places, 437 transitions, 6641 flow. Second operand 11 states and 197 transitions. [2024-06-04 14:45:29,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 502 transitions, 8178 flow [2024-06-04 14:45:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 502 transitions, 7776 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:31,056 INFO L231 Difference]: Finished difference. Result has 290 places, 460 transitions, 7042 flow [2024-06-04 14:45:31,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7042, PETRI_PLACES=290, PETRI_TRANSITIONS=460} [2024-06-04 14:45:31,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-04 14:45:31,057 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 460 transitions, 7042 flow [2024-06-04 14:45:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:45:31,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:31,057 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 14:45:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:45:31,058 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 14:45:31,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2132823783, now seen corresponding path program 9 times [2024-06-04 14:45:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:31,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533790280] [2024-06-04 14:45:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:32,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533790280] [2024-06-04 14:45:32,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533790280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28611748] [2024-06-04 14:45:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:32,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:32,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 460 transitions, 7042 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:32,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:32,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:32,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:34,167 INFO L124 PetriNetUnfolderBase]: 4188/6454 cut-off events. [2024-06-04 14:45:34,167 INFO L125 PetriNetUnfolderBase]: For 880348/880380 co-relation queries the response was YES. [2024-06-04 14:45:34,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66813 conditions, 6454 events. 4188/6454 cut-off events. For 880348/880380 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36060 event pairs, 799 based on Foata normal form. 21/6475 useless extension candidates. Maximal degree in co-relation 66679. Up to 5664 conditions per place. [2024-06-04 14:45:34,255 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 370 selfloop transitions, 112 changer transitions 0/498 dead transitions. [2024-06-04 14:45:34,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 498 transitions, 8248 flow [2024-06-04 14:45:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:45:34,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:45:34,257 INFO L175 Difference]: Start difference. First operand has 290 places, 460 transitions, 7042 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:45:34,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 498 transitions, 8248 flow [2024-06-04 14:45:35,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 498 transitions, 8067 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:35,537 INFO L231 Difference]: Finished difference. Result has 294 places, 462 transitions, 7198 flow [2024-06-04 14:45:35,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7198, PETRI_PLACES=294, PETRI_TRANSITIONS=462} [2024-06-04 14:45:35,538 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-04 14:45:35,538 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 462 transitions, 7198 flow [2024-06-04 14:45:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:35,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:35,538 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 14:45:35,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:45:35,538 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 14:45:35,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2132827503, now seen corresponding path program 10 times [2024-06-04 14:45:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:35,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944244468] [2024-06-04 14:45:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:36,806 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 14:45:36,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:36,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944244468] [2024-06-04 14:45:36,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944244468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:36,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:36,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:36,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409935386] [2024-06-04 14:45:36,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:36,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:36,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:36,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 462 transitions, 7198 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:36,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:36,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:36,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:38,401 INFO L124 PetriNetUnfolderBase]: 4205/6481 cut-off events. [2024-06-04 14:45:38,401 INFO L125 PetriNetUnfolderBase]: For 909922/909954 co-relation queries the response was YES. [2024-06-04 14:45:38,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67811 conditions, 6481 events. 4205/6481 cut-off events. For 909922/909954 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 36242 event pairs, 804 based on Foata normal form. 21/6502 useless extension candidates. Maximal degree in co-relation 67675. Up to 5632 conditions per place. [2024-06-04 14:45:38,491 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 367 selfloop transitions, 117 changer transitions 0/500 dead transitions. [2024-06-04 14:45:38,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 500 transitions, 8408 flow [2024-06-04 14:45:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:45:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:45:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:45:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:45:38,493 INFO L175 Difference]: Start difference. First operand has 294 places, 462 transitions, 7198 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:45:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 500 transitions, 8408 flow [2024-06-04 14:45:39,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 500 transitions, 8147 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-04 14:45:39,878 INFO L231 Difference]: Finished difference. Result has 297 places, 464 transitions, 7288 flow [2024-06-04 14:45:39,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7288, PETRI_PLACES=297, PETRI_TRANSITIONS=464} [2024-06-04 14:45:39,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-04 14:45:39,879 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 464 transitions, 7288 flow [2024-06-04 14:45:39,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:39,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:39,879 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 14:45:39,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:45:39,879 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 14:45:39,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 73461094, now seen corresponding path program 2 times [2024-06-04 14:45:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:39,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559721757] [2024-06-04 14:45:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:40,663 INFO 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 14:45:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559721757] [2024-06-04 14:45:40,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559721757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:40,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:40,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604974197] [2024-06-04 14:45:40,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:40,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:40,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:45:40,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 464 transitions, 7288 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:40,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:40,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:45:40,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:42,269 INFO L124 PetriNetUnfolderBase]: 4554/6869 cut-off events. [2024-06-04 14:45:42,269 INFO L125 PetriNetUnfolderBase]: For 938786/938821 co-relation queries the response was YES. [2024-06-04 14:45:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69638 conditions, 6869 events. 4554/6869 cut-off events. For 938786/938821 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37190 event pairs, 983 based on Foata normal form. 12/6846 useless extension candidates. Maximal degree in co-relation 69501. Up to 6347 conditions per place. [2024-06-04 14:45:42,512 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 387 selfloop transitions, 82 changer transitions 0/508 dead transitions. [2024-06-04 14:45:42,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 508 transitions, 8967 flow [2024-06-04 14:45:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 14:45:42,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:45:42,514 INFO L175 Difference]: Start difference. First operand has 297 places, 464 transitions, 7288 flow. Second operand 8 states and 148 transitions. [2024-06-04 14:45:42,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 508 transitions, 8967 flow [2024-06-04 14:45:43,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 508 transitions, 8634 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:43,650 INFO L231 Difference]: Finished difference. Result has 297 places, 480 transitions, 7355 flow [2024-06-04 14:45:43,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6955, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7355, PETRI_PLACES=297, PETRI_TRANSITIONS=480} [2024-06-04 14:45:43,651 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-04 14:45:43,651 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 480 transitions, 7355 flow [2024-06-04 14:45:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:43,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:43,651 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 14:45:43,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:45:43,651 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 14:45:43,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 639723214, now seen corresponding path program 3 times [2024-06-04 14:45:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:43,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597511469] [2024-06-04 14:45:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:44,452 INFO 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 14:45:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:44,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597511469] [2024-06-04 14:45:44,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597511469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:44,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063114957] [2024-06-04 14:45:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:44,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:45:44,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 480 transitions, 7355 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:44,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:44,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:45:44,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:46,261 INFO L124 PetriNetUnfolderBase]: 4548/6860 cut-off events. [2024-06-04 14:45:46,262 INFO L125 PetriNetUnfolderBase]: For 952036/952073 co-relation queries the response was YES. [2024-06-04 14:45:46,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69324 conditions, 6860 events. 4548/6860 cut-off events. For 952036/952073 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 37073 event pairs, 954 based on Foata normal form. 14/6839 useless extension candidates. Maximal degree in co-relation 69186. Up to 6342 conditions per place. [2024-06-04 14:45:46,346 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 376 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-04 14:45:46,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 503 transitions, 8651 flow [2024-06-04 14:45:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:45:46,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-04 14:45:46,348 INFO L175 Difference]: Start difference. First operand has 297 places, 480 transitions, 7355 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:45:46,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 503 transitions, 8651 flow [2024-06-04 14:45:47,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 503 transitions, 8484 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 14:45:47,495 INFO L231 Difference]: Finished difference. Result has 302 places, 480 transitions, 7372 flow [2024-06-04 14:45:47,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7188, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7372, PETRI_PLACES=302, PETRI_TRANSITIONS=480} [2024-06-04 14:45:47,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-04 14:45:47,496 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 480 transitions, 7372 flow [2024-06-04 14:45:47,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:45:47,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:47,496 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 14:45:47,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:45:47,497 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:47,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1499430161, now seen corresponding path program 11 times [2024-06-04 14:45:47,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:47,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849181255] [2024-06-04 14:45:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:48,613 INFO 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 14:45:48,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849181255] [2024-06-04 14:45:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849181255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:48,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750793593] [2024-06-04 14:45:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:48,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:48,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:48,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 480 transitions, 7372 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:48,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:48,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:48,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:50,396 INFO L124 PetriNetUnfolderBase]: 4319/6630 cut-off events. [2024-06-04 14:45:50,396 INFO L125 PetriNetUnfolderBase]: For 1062922/1062966 co-relation queries the response was YES. [2024-06-04 14:45:50,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71039 conditions, 6630 events. 4319/6630 cut-off events. For 1062922/1062966 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 37278 event pairs, 880 based on Foata normal form. 19/6619 useless extension candidates. Maximal degree in co-relation 70900. Up to 5766 conditions per place. [2024-06-04 14:45:50,489 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 395 selfloop transitions, 98 changer transitions 0/515 dead transitions. [2024-06-04 14:45:50,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 515 transitions, 8588 flow [2024-06-04 14:45:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:45:50,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:45:50,491 INFO L175 Difference]: Start difference. First operand has 302 places, 480 transitions, 7372 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:45:50,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 515 transitions, 8588 flow [2024-06-04 14:45:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 515 transitions, 8406 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:51,792 INFO L231 Difference]: Finished difference. Result has 305 places, 482 transitions, 7525 flow [2024-06-04 14:45:51,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7525, PETRI_PLACES=305, PETRI_TRANSITIONS=482} [2024-06-04 14:45:51,793 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-04 14:45:51,793 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 482 transitions, 7525 flow [2024-06-04 14:45:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:51,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:51,793 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 14:45:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:45:51,794 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 14:45:51,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1609981950, now seen corresponding path program 1 times [2024-06-04 14:45:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:51,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546732198] [2024-06-04 14:45:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:52,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546732198] [2024-06-04 14:45:52,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546732198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:52,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472338319] [2024-06-04 14:45:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:52,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:52,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:45:52,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 482 transitions, 7525 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:45:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:45:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:54,378 INFO L124 PetriNetUnfolderBase]: 4612/6953 cut-off events. [2024-06-04 14:45:54,378 INFO L125 PetriNetUnfolderBase]: For 1013827/1013862 co-relation queries the response was YES. [2024-06-04 14:45:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6953 events. 4612/6953 cut-off events. For 1013827/1013862 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 37732 event pairs, 993 based on Foata normal form. 12/6930 useless extension candidates. Maximal degree in co-relation 71242. Up to 6352 conditions per place. [2024-06-04 14:45:54,470 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 395 selfloop transitions, 94 changer transitions 0/529 dead transitions. [2024-06-04 14:45:54,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 529 transitions, 9270 flow [2024-06-04 14:45:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 14:45:54,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:45:54,472 INFO L175 Difference]: Start difference. First operand has 305 places, 482 transitions, 7525 flow. Second operand 9 states and 165 transitions. [2024-06-04 14:45:54,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 529 transitions, 9270 flow [2024-06-04 14:45:55,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 529 transitions, 8959 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-04 14:45:55,924 INFO L231 Difference]: Finished difference. Result has 308 places, 497 transitions, 7675 flow [2024-06-04 14:45:55,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7675, PETRI_PLACES=308, PETRI_TRANSITIONS=497} [2024-06-04 14:45:55,925 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-04 14:45:55,925 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 497 transitions, 7675 flow [2024-06-04 14:45:55,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:45:55,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:55,925 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 14:45:55,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:45:55,926 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:55,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1795718183, now seen corresponding path program 12 times [2024-06-04 14:45:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:55,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932290251] [2024-06-04 14:45:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:57,212 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 14:45:57,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932290251] [2024-06-04 14:45:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932290251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:57,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:57,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892480873] [2024-06-04 14:45:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:57,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 497 transitions, 7675 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:45:57,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:57,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:57,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:58,913 INFO L124 PetriNetUnfolderBase]: 4360/6695 cut-off events. [2024-06-04 14:45:58,914 INFO L125 PetriNetUnfolderBase]: For 1027924/1027964 co-relation queries the response was YES. [2024-06-04 14:45:58,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71498 conditions, 6695 events. 4360/6695 cut-off events. For 1027924/1027964 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 37768 event pairs, 1030 based on Foata normal form. 13/6666 useless extension candidates. Maximal degree in co-relation 71356. Up to 5665 conditions per place. [2024-06-04 14:45:59,017 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 382 selfloop transitions, 132 changer transitions 0/536 dead transitions. [2024-06-04 14:45:59,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 536 transitions, 9297 flow [2024-06-04 14:45:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:45:59,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-04 14:45:59,018 INFO L175 Difference]: Start difference. First operand has 308 places, 497 transitions, 7675 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:45:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 536 transitions, 9297 flow [2024-06-04 14:46:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 536 transitions, 9223 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 14:46:00,515 INFO L231 Difference]: Finished difference. Result has 314 places, 501 transitions, 8091 flow [2024-06-04 14:46:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7601, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8091, PETRI_PLACES=314, PETRI_TRANSITIONS=501} [2024-06-04 14:46:00,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-04 14:46:00,515 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 501 transitions, 8091 flow [2024-06-04 14:46:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:00,516 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 14:46:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:46:00,516 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:00,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1499339796, now seen corresponding path program 3 times [2024-06-04 14:46:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459783643] [2024-06-04 14:46:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:01,737 INFO 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 14:46:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459783643] [2024-06-04 14:46:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459783643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:01,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:01,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665798868] [2024-06-04 14:46:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:01,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:01,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 501 transitions, 8091 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:01,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:01,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:01,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:03,442 INFO L124 PetriNetUnfolderBase]: 4355/6710 cut-off events. [2024-06-04 14:46:03,442 INFO L125 PetriNetUnfolderBase]: For 1048312/1048352 co-relation queries the response was YES. [2024-06-04 14:46:03,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72367 conditions, 6710 events. 4355/6710 cut-off events. For 1048312/1048352 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38172 event pairs, 1042 based on Foata normal form. 11/6689 useless extension candidates. Maximal degree in co-relation 72223. Up to 5834 conditions per place. [2024-06-04 14:46:03,540 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 363 selfloop transitions, 152 changer transitions 0/537 dead transitions. [2024-06-04 14:46:03,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 537 transitions, 9371 flow [2024-06-04 14:46:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:46:03,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:46:03,542 INFO L175 Difference]: Start difference. First operand has 314 places, 501 transitions, 8091 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:46:03,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 537 transitions, 9371 flow [2024-06-04 14:46:05,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 537 transitions, 9126 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:05,410 INFO L231 Difference]: Finished difference. Result has 317 places, 504 transitions, 8322 flow [2024-06-04 14:46:05,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=317, PETRI_TRANSITIONS=504} [2024-06-04 14:46:05,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-04 14:46:05,411 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 504 transitions, 8322 flow [2024-06-04 14:46:05,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:05,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:05,411 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 14:46:05,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:46:05,411 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:05,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1878838793, now seen corresponding path program 13 times [2024-06-04 14:46:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000027808] [2024-06-04 14:46:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:06,700 INFO 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 14:46:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000027808] [2024-06-04 14:46:06,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000027808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:06,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:06,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:06,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32848883] [2024-06-04 14:46:06,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:06,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:06,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 504 transitions, 8322 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:06,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:08,381 INFO L124 PetriNetUnfolderBase]: 4347/6682 cut-off events. [2024-06-04 14:46:08,381 INFO L125 PetriNetUnfolderBase]: For 1041842/1041882 co-relation queries the response was YES. [2024-06-04 14:46:08,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72278 conditions, 6682 events. 4347/6682 cut-off events. For 1041842/1041882 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37803 event pairs, 1046 based on Foata normal form. 13/6653 useless extension candidates. Maximal degree in co-relation 72133. Up to 5854 conditions per place. [2024-06-04 14:46:08,480 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 391 selfloop transitions, 124 changer transitions 0/537 dead transitions. [2024-06-04 14:46:08,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 537 transitions, 9480 flow [2024-06-04 14:46:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:46:08,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-04 14:46:08,482 INFO L175 Difference]: Start difference. First operand has 317 places, 504 transitions, 8322 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:46:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 537 transitions, 9480 flow [2024-06-04 14:46:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 537 transitions, 9062 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:10,192 INFO L231 Difference]: Finished difference. Result has 319 places, 504 transitions, 8172 flow [2024-06-04 14:46:10,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8172, PETRI_PLACES=319, PETRI_TRANSITIONS=504} [2024-06-04 14:46:10,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-04 14:46:10,193 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 504 transitions, 8172 flow [2024-06-04 14:46:10,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:10,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:10,194 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 14:46:10,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:46:10,194 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:10,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1316286353, now seen corresponding path program 14 times [2024-06-04 14:46:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:10,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130680898] [2024-06-04 14:46:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130680898] [2024-06-04 14:46:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130680898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:11,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:11,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529083180] [2024-06-04 14:46:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:11,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:11,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:11,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 504 transitions, 8172 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:11,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:11,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:11,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:13,520 INFO L124 PetriNetUnfolderBase]: 4349/6696 cut-off events. [2024-06-04 14:46:13,520 INFO L125 PetriNetUnfolderBase]: For 960595/960627 co-relation queries the response was YES. [2024-06-04 14:46:13,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70669 conditions, 6696 events. 4349/6696 cut-off events. For 960595/960627 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37672 event pairs, 795 based on Foata normal form. 21/6717 useless extension candidates. Maximal degree in co-relation 70523. Up to 5737 conditions per place. [2024-06-04 14:46:13,623 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 384 selfloop transitions, 132 changer transitions 0/538 dead transitions. [2024-06-04 14:46:13,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 538 transitions, 9434 flow [2024-06-04 14:46:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:46:13,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 14:46:13,625 INFO L175 Difference]: Start difference. First operand has 319 places, 504 transitions, 8172 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:46:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 538 transitions, 9434 flow [2024-06-04 14:46:15,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 538 transitions, 9144 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 14:46:15,209 INFO L231 Difference]: Finished difference. Result has 319 places, 506 transitions, 8262 flow [2024-06-04 14:46:15,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8262, PETRI_PLACES=319, PETRI_TRANSITIONS=506} [2024-06-04 14:46:15,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-04 14:46:15,210 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 506 transitions, 8262 flow [2024-06-04 14:46:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:15,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:15,211 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 14:46:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:46:15,211 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:15,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash 833711013, now seen corresponding path program 15 times [2024-06-04 14:46:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:15,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41146392] [2024-06-04 14:46:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:15,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:16,809 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 14:46:16,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41146392] [2024-06-04 14:46:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41146392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:16,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786411089] [2024-06-04 14:46:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:16,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:16,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 506 transitions, 8262 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:18,730 INFO L124 PetriNetUnfolderBase]: 4531/6951 cut-off events. [2024-06-04 14:46:18,731 INFO L125 PetriNetUnfolderBase]: For 980302/980334 co-relation queries the response was YES. [2024-06-04 14:46:18,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73522 conditions, 6951 events. 4531/6951 cut-off events. For 980302/980334 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39130 event pairs, 837 based on Foata normal form. 21/6957 useless extension candidates. Maximal degree in co-relation 73376. Up to 6099 conditions per place. [2024-06-04 14:46:18,830 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 431 selfloop transitions, 127 changer transitions 0/580 dead transitions. [2024-06-04 14:46:18,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 580 transitions, 10646 flow [2024-06-04 14:46:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:46:18,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:46:18,832 INFO L175 Difference]: Start difference. First operand has 319 places, 506 transitions, 8262 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:46:18,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 580 transitions, 10646 flow [2024-06-04 14:46:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 580 transitions, 10221 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:20,410 INFO L231 Difference]: Finished difference. Result has 325 places, 543 transitions, 9089 flow [2024-06-04 14:46:20,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9089, PETRI_PLACES=325, PETRI_TRANSITIONS=543} [2024-06-04 14:46:20,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-04 14:46:20,411 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 543 transitions, 9089 flow [2024-06-04 14:46:20,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:20,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:20,411 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 14:46:20,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:46:20,412 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:20,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 839221263, now seen corresponding path program 16 times [2024-06-04 14:46:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949331524] [2024-06-04 14:46:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949331524] [2024-06-04 14:46:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949331524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009004144] [2024-06-04 14:46:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:21,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:21,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 543 transitions, 9089 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:21,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:21,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:21,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:23,585 INFO L124 PetriNetUnfolderBase]: 4525/6948 cut-off events. [2024-06-04 14:46:23,586 INFO L125 PetriNetUnfolderBase]: For 968411/968448 co-relation queries the response was YES. [2024-06-04 14:46:23,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73216 conditions, 6948 events. 4525/6948 cut-off events. For 968411/968448 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39227 event pairs, 780 based on Foata normal form. 21/6957 useless extension candidates. Maximal degree in co-relation 73066. Up to 5931 conditions per place. [2024-06-04 14:46:23,689 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 170 changer transitions 0/575 dead transitions. [2024-06-04 14:46:23,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 575 transitions, 10323 flow [2024-06-04 14:46:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:46:23,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:46:23,691 INFO L175 Difference]: Start difference. First operand has 325 places, 543 transitions, 9089 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:46:23,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 575 transitions, 10323 flow [2024-06-04 14:46:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 575 transitions, 10080 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-04 14:46:25,395 INFO L231 Difference]: Finished difference. Result has 330 places, 543 transitions, 9199 flow [2024-06-04 14:46:25,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9199, PETRI_PLACES=330, PETRI_TRANSITIONS=543} [2024-06-04 14:46:25,396 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-04 14:46:25,396 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 543 transitions, 9199 flow [2024-06-04 14:46:25,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:25,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:25,397 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 14:46:25,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:46:25,397 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:25,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1322008364, now seen corresponding path program 2 times [2024-06-04 14:46:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520123642] [2024-06-04 14:46:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:26,804 INFO 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 14:46:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:26,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520123642] [2024-06-04 14:46:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520123642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892725132] [2024-06-04 14:46:26,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:26,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:46:26,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 543 transitions, 9199 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:46:26,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:26,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:46:26,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:28,768 INFO L124 PetriNetUnfolderBase]: 4924/7391 cut-off events. [2024-06-04 14:46:28,768 INFO L125 PetriNetUnfolderBase]: For 985658/985670 co-relation queries the response was YES. [2024-06-04 14:46:28,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75281 conditions, 7391 events. 4924/7391 cut-off events. For 985658/985670 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40071 event pairs, 844 based on Foata normal form. 18/7409 useless extension candidates. Maximal degree in co-relation 75129. Up to 5848 conditions per place. [2024-06-04 14:46:28,876 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 330 selfloop transitions, 247 changer transitions 0/596 dead transitions. [2024-06-04 14:46:28,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 596 transitions, 10694 flow [2024-06-04 14:46:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-04 14:46:28,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-04 14:46:28,878 INFO L175 Difference]: Start difference. First operand has 330 places, 543 transitions, 9199 flow. Second operand 10 states and 179 transitions. [2024-06-04 14:46:28,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 596 transitions, 10694 flow [2024-06-04 14:46:30,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 596 transitions, 10301 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:30,562 INFO L231 Difference]: Finished difference. Result has 334 places, 557 transitions, 9541 flow [2024-06-04 14:46:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9541, PETRI_PLACES=334, PETRI_TRANSITIONS=557} [2024-06-04 14:46:30,563 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-04 14:46:30,563 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 557 transitions, 9541 flow [2024-06-04 14:46:30,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:46:30,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:30,563 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 14:46:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:46:30,564 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 14:46:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1941034820, now seen corresponding path program 4 times [2024-06-04 14:46:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:30,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561606010] [2024-06-04 14:46:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:31,386 INFO 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 14:46:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561606010] [2024-06-04 14:46:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561606010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:31,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:46:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338399095] [2024-06-04 14:46:31,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:46:31,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:46:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:46:31,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:46:31,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 557 transitions, 9541 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:46:31,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:31,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:46:31,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:33,217 INFO L124 PetriNetUnfolderBase]: 4792/7250 cut-off events. [2024-06-04 14:46:33,217 INFO L125 PetriNetUnfolderBase]: For 996207/996247 co-relation queries the response was YES. [2024-06-04 14:46:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74837 conditions, 7250 events. 4792/7250 cut-off events. For 996207/996247 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40054 event pairs, 1320 based on Foata normal form. 14/7229 useless extension candidates. Maximal degree in co-relation 74683. Up to 6638 conditions per place. [2024-06-04 14:46:33,328 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 93 changer transitions 0/584 dead transitions. [2024-06-04 14:46:33,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 584 transitions, 10915 flow [2024-06-04 14:46:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:46:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:46:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 14:46:33,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-04 14:46:33,329 INFO L175 Difference]: Start difference. First operand has 334 places, 557 transitions, 9541 flow. Second operand 7 states and 127 transitions. [2024-06-04 14:46:33,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 584 transitions, 10915 flow [2024-06-04 14:46:34,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 584 transitions, 10316 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-04 14:46:34,773 INFO L231 Difference]: Finished difference. Result has 332 places, 562 transitions, 9253 flow [2024-06-04 14:46:34,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9253, PETRI_PLACES=332, PETRI_TRANSITIONS=562} [2024-06-04 14:46:34,774 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-04 14:46:34,774 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 562 transitions, 9253 flow [2024-06-04 14:46:34,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:46:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:34,774 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 14:46:34,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:46:34,775 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 14:46:34,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2019170042, now seen corresponding path program 5 times [2024-06-04 14:46:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872772628] [2024-06-04 14:46:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:35,600 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 14:46:35,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872772628] [2024-06-04 14:46:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872772628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:35,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:35,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:46:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615456052] [2024-06-04 14:46:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:46:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:35,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:46:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:46:35,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:46:35,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 562 transitions, 9253 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:46:35,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:35,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:46:35,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:37,554 INFO L124 PetriNetUnfolderBase]: 4801/7253 cut-off events. [2024-06-04 14:46:37,554 INFO L125 PetriNetUnfolderBase]: For 984622/984659 co-relation queries the response was YES. [2024-06-04 14:46:37,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74244 conditions, 7253 events. 4801/7253 cut-off events. For 984622/984659 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39848 event pairs, 974 based on Foata normal form. 14/7232 useless extension candidates. Maximal degree in co-relation 74089. Up to 6646 conditions per place. [2024-06-04 14:46:37,660 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 434 selfloop transitions, 96 changer transitions 0/585 dead transitions. [2024-06-04 14:46:37,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 585 transitions, 10626 flow [2024-06-04 14:46:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:46:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:46:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 14:46:37,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-04 14:46:37,662 INFO L175 Difference]: Start difference. First operand has 332 places, 562 transitions, 9253 flow. Second operand 7 states and 123 transitions. [2024-06-04 14:46:37,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 585 transitions, 10626 flow [2024-06-04 14:46:39,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 585 transitions, 10419 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:39,187 INFO L231 Difference]: Finished difference. Result has 333 places, 567 transitions, 9353 flow [2024-06-04 14:46:39,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9353, PETRI_PLACES=333, PETRI_TRANSITIONS=567} [2024-06-04 14:46:39,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-04 14:46:39,188 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 567 transitions, 9353 flow [2024-06-04 14:46:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:46:39,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:39,188 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 14:46:39,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:46:39,188 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:39,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1193222285, now seen corresponding path program 17 times [2024-06-04 14:46:39,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:39,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623775551] [2024-06-04 14:46:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:39,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:40,635 INFO 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 14:46:40,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:40,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623775551] [2024-06-04 14:46:40,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623775551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:40,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:40,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:40,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939097424] [2024-06-04 14:46:40,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:40,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:40,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:40,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 567 transitions, 9353 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:40,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:40,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:40,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:42,548 INFO L124 PetriNetUnfolderBase]: 4581/7024 cut-off events. [2024-06-04 14:46:42,549 INFO L125 PetriNetUnfolderBase]: For 973598/973660 co-relation queries the response was YES. [2024-06-04 14:46:42,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74028 conditions, 7024 events. 4581/7024 cut-off events. For 973598/973660 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39577 event pairs, 801 based on Foata normal form. 30/7054 useless extension candidates. Maximal degree in co-relation 73874. Up to 5893 conditions per place. [2024-06-04 14:46:42,654 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 402 selfloop transitions, 170 changer transitions 0/599 dead transitions. [2024-06-04 14:46:42,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 599 transitions, 10725 flow [2024-06-04 14:46:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:46:42,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 14:46:42,656 INFO L175 Difference]: Start difference. First operand has 333 places, 567 transitions, 9353 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:46:42,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 599 transitions, 10725 flow [2024-06-04 14:46:44,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 599 transitions, 10545 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:46:44,428 INFO L231 Difference]: Finished difference. Result has 337 places, 569 transitions, 9630 flow [2024-06-04 14:46:44,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9630, PETRI_PLACES=337, PETRI_TRANSITIONS=569} [2024-06-04 14:46:44,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-04 14:46:44,432 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 569 transitions, 9630 flow [2024-06-04 14:46:44,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:44,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:44,433 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 14:46:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:46:44,433 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:44,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:44,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1193218565, now seen corresponding path program 18 times [2024-06-04 14:46:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:44,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206047225] [2024-06-04 14:46:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:44,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:45,834 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 14:46:45,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:45,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206047225] [2024-06-04 14:46:45,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206047225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:45,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:45,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:45,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800804426] [2024-06-04 14:46:45,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:45,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:46,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 569 transitions, 9630 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:47,665 INFO L124 PetriNetUnfolderBase]: 4599/7052 cut-off events. [2024-06-04 14:46:47,665 INFO L125 PetriNetUnfolderBase]: For 985082/985144 co-relation queries the response was YES. [2024-06-04 14:46:47,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74966 conditions, 7052 events. 4599/7052 cut-off events. For 985082/985144 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39764 event pairs, 801 based on Foata normal form. 30/7082 useless extension candidates. Maximal degree in co-relation 74812. Up to 5851 conditions per place. [2024-06-04 14:46:47,772 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 403 selfloop transitions, 175 changer transitions 0/605 dead transitions. [2024-06-04 14:46:47,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 605 transitions, 11396 flow [2024-06-04 14:46:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:46:47,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:46:47,774 INFO L175 Difference]: Start difference. First operand has 337 places, 569 transitions, 9630 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:46:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 605 transitions, 11396 flow [2024-06-04 14:46:49,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 605 transitions, 10957 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:49,228 INFO L231 Difference]: Finished difference. Result has 339 places, 573 transitions, 9772 flow [2024-06-04 14:46:49,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9772, PETRI_PLACES=339, PETRI_TRANSITIONS=573} [2024-06-04 14:46:49,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-04 14:46:49,229 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 573 transitions, 9772 flow [2024-06-04 14:46:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:49,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:49,229 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 14:46:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:46:49,229 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:49,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1198728815, now seen corresponding path program 19 times [2024-06-04 14:46:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175770003] [2024-06-04 14:46:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:50,593 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 14:46:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:50,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175770003] [2024-06-04 14:46:50,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175770003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:50,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:50,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998299301] [2024-06-04 14:46:50,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:50,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:50,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 573 transitions, 9772 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:50,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:50,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:50,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:52,440 INFO L124 PetriNetUnfolderBase]: 4616/7079 cut-off events. [2024-06-04 14:46:52,440 INFO L125 PetriNetUnfolderBase]: For 1010738/1010780 co-relation queries the response was YES. [2024-06-04 14:46:52,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75590 conditions, 7079 events. 4616/7079 cut-off events. For 1010738/1010780 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40023 event pairs, 801 based on Foata normal form. 25/7104 useless extension candidates. Maximal degree in co-relation 75435. Up to 5948 conditions per place. [2024-06-04 14:46:52,551 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 410 selfloop transitions, 169 changer transitions 0/606 dead transitions. [2024-06-04 14:46:52,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 606 transitions, 11172 flow [2024-06-04 14:46:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:46:52,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:46:52,553 INFO L175 Difference]: Start difference. First operand has 339 places, 573 transitions, 9772 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:46:52,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 606 transitions, 11172 flow [2024-06-04 14:46:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 606 transitions, 10830 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-04 14:46:54,083 INFO L231 Difference]: Finished difference. Result has 343 places, 575 transitions, 9893 flow [2024-06-04 14:46:54,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9452, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9893, PETRI_PLACES=343, PETRI_TRANSITIONS=575} [2024-06-04 14:46:54,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-04 14:46:54,084 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 575 transitions, 9893 flow [2024-06-04 14:46:54,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:54,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:54,085 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 14:46:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:46:54,085 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:54,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash -326270127, now seen corresponding path program 20 times [2024-06-04 14:46:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:54,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088338348] [2024-06-04 14:46:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:55,436 INFO 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 14:46:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:55,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088338348] [2024-06-04 14:46:55,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088338348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:55,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:55,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500867699] [2024-06-04 14:46:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:55,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:55,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 575 transitions, 9893 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:55,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:55,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:55,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:57,291 INFO L124 PetriNetUnfolderBase]: 4608/7067 cut-off events. [2024-06-04 14:46:57,291 INFO L125 PetriNetUnfolderBase]: For 1018824/1018886 co-relation queries the response was YES. [2024-06-04 14:46:57,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75665 conditions, 7067 events. 4608/7067 cut-off events. For 1018824/1018886 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39903 event pairs, 769 based on Foata normal form. 30/7097 useless extension candidates. Maximal degree in co-relation 75508. Up to 5936 conditions per place. [2024-06-04 14:46:57,399 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 393 selfloop transitions, 185 changer transitions 0/605 dead transitions. [2024-06-04 14:46:57,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 605 transitions, 11171 flow [2024-06-04 14:46:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:46:57,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:46:57,400 INFO L175 Difference]: Start difference. First operand has 343 places, 575 transitions, 9893 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:46:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 605 transitions, 11171 flow [2024-06-04 14:46:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 605 transitions, 10674 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:59,195 INFO L231 Difference]: Finished difference. Result has 345 places, 575 transitions, 9773 flow [2024-06-04 14:46:59,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9773, PETRI_PLACES=345, PETRI_TRANSITIONS=575} [2024-06-04 14:46:59,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-04 14:46:59,196 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 575 transitions, 9773 flow [2024-06-04 14:46:59,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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 14:46:59,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:59,196 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 14:46:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:46:59,197 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:59,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1198944296, now seen corresponding path program 3 times [2024-06-04 14:46:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281025249] [2024-06-04 14:46:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281025249] [2024-06-04 14:47:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281025249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:00,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:00,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832568877] [2024-06-04 14:47:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:00,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 575 transitions, 9773 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:02,434 INFO L124 PetriNetUnfolderBase]: 4982/7483 cut-off events. [2024-06-04 14:47:02,434 INFO L125 PetriNetUnfolderBase]: For 1066135/1066152 co-relation queries the response was YES. [2024-06-04 14:47:02,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77891 conditions, 7483 events. 4982/7483 cut-off events. For 1066135/1066152 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40930 event pairs, 1322 based on Foata normal form. 10/7474 useless extension candidates. Maximal degree in co-relation 77733. Up to 7037 conditions per place. [2024-06-04 14:47:02,549 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 524 selfloop transitions, 66 changer transitions 0/613 dead transitions. [2024-06-04 14:47:02,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 613 transitions, 11184 flow [2024-06-04 14:47:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 14:47:02,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-04 14:47:02,550 INFO L175 Difference]: Start difference. First operand has 345 places, 575 transitions, 9773 flow. Second operand 10 states and 172 transitions. [2024-06-04 14:47:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 613 transitions, 11184 flow [2024-06-04 14:47:04,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 613 transitions, 10795 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:04,470 INFO L231 Difference]: Finished difference. Result has 348 places, 580 transitions, 9625 flow [2024-06-04 14:47:04,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9384, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9625, PETRI_PLACES=348, PETRI_TRANSITIONS=580} [2024-06-04 14:47:04,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-04 14:47:04,473 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 580 transitions, 9625 flow [2024-06-04 14:47:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:04,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:04,474 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 14:47:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:47:04,474 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:04,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -326054646, now seen corresponding path program 4 times [2024-06-04 14:47:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548964976] [2024-06-04 14:47:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:05,935 INFO 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 14:47:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548964976] [2024-06-04 14:47:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548964976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:05,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:05,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520888494] [2024-06-04 14:47:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:06,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:06,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 580 transitions, 9625 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:06,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:06,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:06,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:07,868 INFO L124 PetriNetUnfolderBase]: 4971/7466 cut-off events. [2024-06-04 14:47:07,868 INFO L125 PetriNetUnfolderBase]: For 1084988/1085005 co-relation queries the response was YES. [2024-06-04 14:47:07,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77615 conditions, 7466 events. 4971/7466 cut-off events. For 1084988/1085005 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40795 event pairs, 1322 based on Foata normal form. 10/7457 useless extension candidates. Maximal degree in co-relation 77455. Up to 7020 conditions per place. [2024-06-04 14:47:07,979 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 525 selfloop transitions, 70 changer transitions 0/618 dead transitions. [2024-06-04 14:47:07,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 618 transitions, 11059 flow [2024-06-04 14:47:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 14:47:07,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-06-04 14:47:07,981 INFO L175 Difference]: Start difference. First operand has 348 places, 580 transitions, 9625 flow. Second operand 10 states and 171 transitions. [2024-06-04 14:47:07,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 618 transitions, 11059 flow [2024-06-04 14:47:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 618 transitions, 10863 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:47:10,033 INFO L231 Difference]: Finished difference. Result has 352 places, 585 transitions, 9689 flow [2024-06-04 14:47:10,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9689, PETRI_PLACES=352, PETRI_TRANSITIONS=585} [2024-06-04 14:47:10,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-04 14:47:10,039 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 585 transitions, 9689 flow [2024-06-04 14:47:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:10,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:10,039 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 14:47:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:47:10,039 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:10,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -221151046, now seen corresponding path program 5 times [2024-06-04 14:47:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139575618] [2024-06-04 14:47:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:11,414 INFO 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 14:47:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139575618] [2024-06-04 14:47:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139575618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550620450] [2024-06-04 14:47:11,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:11,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:11,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:11,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 585 transitions, 9689 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:11,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:11,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:13,236 INFO L124 PetriNetUnfolderBase]: 4993/7498 cut-off events. [2024-06-04 14:47:13,237 INFO L125 PetriNetUnfolderBase]: For 1111325/1111342 co-relation queries the response was YES. [2024-06-04 14:47:13,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78334 conditions, 7498 events. 4993/7498 cut-off events. For 1111325/1111342 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40967 event pairs, 1332 based on Foata normal form. 10/7489 useless extension candidates. Maximal degree in co-relation 78172. Up to 7048 conditions per place. [2024-06-04 14:47:13,352 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 520 selfloop transitions, 85 changer transitions 0/628 dead transitions. [2024-06-04 14:47:13,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 628 transitions, 11218 flow [2024-06-04 14:47:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-04 14:47:13,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-04 14:47:13,353 INFO L175 Difference]: Start difference. First operand has 352 places, 585 transitions, 9689 flow. Second operand 10 states and 169 transitions. [2024-06-04 14:47:13,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 628 transitions, 11218 flow [2024-06-04 14:47:15,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 628 transitions, 11002 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 14:47:15,281 INFO L231 Difference]: Finished difference. Result has 356 places, 598 transitions, 9887 flow [2024-06-04 14:47:15,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9487, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9887, PETRI_PLACES=356, PETRI_TRANSITIONS=598} [2024-06-04 14:47:15,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-04 14:47:15,282 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 598 transitions, 9887 flow [2024-06-04 14:47:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:15,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:15,283 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 14:47:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:47:15,283 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:15,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -221141746, now seen corresponding path program 6 times [2024-06-04 14:47:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:15,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263856145] [2024-06-04 14:47:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:16,585 INFO 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 14:47:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:16,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263856145] [2024-06-04 14:47:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263856145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:16,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336544005] [2024-06-04 14:47:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:16,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:16,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:16,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 598 transitions, 9887 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:16,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:16,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:16,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:18,453 INFO L124 PetriNetUnfolderBase]: 4994/7500 cut-off events. [2024-06-04 14:47:18,453 INFO L125 PetriNetUnfolderBase]: For 1103945/1103961 co-relation queries the response was YES. [2024-06-04 14:47:18,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78543 conditions, 7500 events. 4994/7500 cut-off events. For 1103945/1103961 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40775 event pairs, 784 based on Foata normal form. 18/7518 useless extension candidates. Maximal degree in co-relation 78379. Up to 5290 conditions per place. [2024-06-04 14:47:18,568 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 291 selfloop transitions, 343 changer transitions 0/657 dead transitions. [2024-06-04 14:47:18,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 657 transitions, 11814 flow [2024-06-04 14:47:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:47:18,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:47:18,569 INFO L175 Difference]: Start difference. First operand has 356 places, 598 transitions, 9887 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:47:18,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 657 transitions, 11814 flow [2024-06-04 14:47:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 657 transitions, 11625 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 14:47:20,412 INFO L231 Difference]: Finished difference. Result has 362 places, 620 transitions, 10703 flow [2024-06-04 14:47:20,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10703, PETRI_PLACES=362, PETRI_TRANSITIONS=620} [2024-06-04 14:47:20,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-04 14:47:20,413 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 620 transitions, 10703 flow [2024-06-04 14:47:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:20,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:20,414 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 14:47:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:47:20,414 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1690998198, now seen corresponding path program 7 times [2024-06-04 14:47:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582061790] [2024-06-04 14:47:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:21,797 INFO 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 14:47:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582061790] [2024-06-04 14:47:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582061790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:21,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:21,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823839197] [2024-06-04 14:47:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:21,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:21,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 620 transitions, 10703 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:21,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:21,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:23,695 INFO L124 PetriNetUnfolderBase]: 4993/7497 cut-off events. [2024-06-04 14:47:23,696 INFO L125 PetriNetUnfolderBase]: For 1161502/1161519 co-relation queries the response was YES. [2024-06-04 14:47:23,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80709 conditions, 7497 events. 4993/7497 cut-off events. For 1161502/1161519 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40956 event pairs, 1322 based on Foata normal form. 10/7488 useless extension candidates. Maximal degree in co-relation 80543. Up to 7047 conditions per place. [2024-06-04 14:47:23,826 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 548 selfloop transitions, 81 changer transitions 0/652 dead transitions. [2024-06-04 14:47:23,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 652 transitions, 12151 flow [2024-06-04 14:47:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 14:47:23,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:47:23,828 INFO L175 Difference]: Start difference. First operand has 362 places, 620 transitions, 10703 flow. Second operand 10 states and 170 transitions. [2024-06-04 14:47:23,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 652 transitions, 12151 flow [2024-06-04 14:47:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 652 transitions, 11849 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 14:47:26,222 INFO L231 Difference]: Finished difference. Result has 368 places, 622 transitions, 10647 flow [2024-06-04 14:47:26,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10647, PETRI_PLACES=368, PETRI_TRANSITIONS=622} [2024-06-04 14:47:26,223 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-04 14:47:26,223 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 622 transitions, 10647 flow [2024-06-04 14:47:26,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 14:47:26,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:26,223 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 14:47:26,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:47:26,224 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 14:47:26,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash -751151154, now seen corresponding path program 6 times [2024-06-04 14:47:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:26,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520774679] [2024-06-04 14:47:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:27,082 INFO 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 14:47:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:27,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520774679] [2024-06-04 14:47:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520774679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852976758] [2024-06-04 14:47:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:27,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:27,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:27,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 622 transitions, 10647 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:27,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:27,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:27,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:29,063 INFO L124 PetriNetUnfolderBase]: 4828/7304 cut-off events. [2024-06-04 14:47:29,064 INFO L125 PetriNetUnfolderBase]: For 1132765/1132806 co-relation queries the response was YES. [2024-06-04 14:47:29,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78193 conditions, 7304 events. 4828/7304 cut-off events. For 1132765/1132806 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40328 event pairs, 960 based on Foata normal form. 18/7287 useless extension candidates. Maximal degree in co-relation 78025. Up to 6681 conditions per place. [2024-06-04 14:47:29,186 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 480 selfloop transitions, 94 changer transitions 0/633 dead transitions. [2024-06-04 14:47:29,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 633 transitions, 11836 flow [2024-06-04 14:47:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:47:29,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-04 14:47:29,187 INFO L175 Difference]: Start difference. First operand has 368 places, 622 transitions, 10647 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:47:29,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 633 transitions, 11836 flow [2024-06-04 14:47:31,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 633 transitions, 11560 flow, removed 54 selfloop flow, removed 10 redundant places. [2024-06-04 14:47:31,545 INFO L231 Difference]: Finished difference. Result has 365 places, 622 transitions, 10567 flow [2024-06-04 14:47:31,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10371, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10567, PETRI_PLACES=365, PETRI_TRANSITIONS=622} [2024-06-04 14:47:31,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-04 14:47:31,546 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 622 transitions, 10567 flow [2024-06-04 14:47:31,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:31,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:31,546 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 14:47:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:47:31,546 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 14:47:31,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1605862728, now seen corresponding path program 2 times [2024-06-04 14:47:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:31,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776763030] [2024-06-04 14:47:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:32,428 INFO 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 14:47:32,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:32,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776763030] [2024-06-04 14:47:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776763030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:32,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:32,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104043191] [2024-06-04 14:47:32,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:32,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:32,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 622 transitions, 10567 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:32,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:32,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:32,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:34,541 INFO L124 PetriNetUnfolderBase]: 4834/7315 cut-off events. [2024-06-04 14:47:34,541 INFO L125 PetriNetUnfolderBase]: For 1153899/1153944 co-relation queries the response was YES. [2024-06-04 14:47:34,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78354 conditions, 7315 events. 4834/7315 cut-off events. For 1153899/1153944 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40493 event pairs, 1326 based on Foata normal form. 17/7297 useless extension candidates. Maximal degree in co-relation 78188. Up to 6840 conditions per place. [2024-06-04 14:47:34,643 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 538 selfloop transitions, 38 changer transitions 0/635 dead transitions. [2024-06-04 14:47:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 635 transitions, 11957 flow [2024-06-04 14:47:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 14:47:34,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-04 14:47:34,644 INFO L175 Difference]: Start difference. First operand has 365 places, 622 transitions, 10567 flow. Second operand 7 states and 114 transitions. [2024-06-04 14:47:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 635 transitions, 11957 flow [2024-06-04 14:47:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 635 transitions, 11645 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:47:36,458 INFO L231 Difference]: Finished difference. Result has 365 places, 625 transitions, 10383 flow [2024-06-04 14:47:36,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10255, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10383, PETRI_PLACES=365, PETRI_TRANSITIONS=625} [2024-06-04 14:47:36,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-04 14:47:36,459 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 625 transitions, 10383 flow [2024-06-04 14:47:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:36,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:36,459 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 14:47:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:47:36,459 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 14:47:36,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1605387498, now seen corresponding path program 3 times [2024-06-04 14:47:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552625684] [2024-06-04 14:47:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:37,359 INFO 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 14:47:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:37,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552625684] [2024-06-04 14:47:37,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552625684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:37,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:37,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219424904] [2024-06-04 14:47:37,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:37,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:37,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 625 transitions, 10383 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:37,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:37,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:37,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:39,541 INFO L124 PetriNetUnfolderBase]: 4831/7311 cut-off events. [2024-06-04 14:47:39,541 INFO L125 PetriNetUnfolderBase]: For 1170468/1170513 co-relation queries the response was YES. [2024-06-04 14:47:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78353 conditions, 7311 events. 4831/7311 cut-off events. For 1170468/1170513 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40425 event pairs, 1326 based on Foata normal form. 17/7293 useless extension candidates. Maximal degree in co-relation 78186. Up to 6837 conditions per place. [2024-06-04 14:47:39,643 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 535 selfloop transitions, 40 changer transitions 0/634 dead transitions. [2024-06-04 14:47:39,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 634 transitions, 11561 flow [2024-06-04 14:47:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 14:47:39,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-04 14:47:39,645 INFO L175 Difference]: Start difference. First operand has 365 places, 625 transitions, 10383 flow. Second operand 7 states and 112 transitions. [2024-06-04 14:47:39,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 634 transitions, 11561 flow [2024-06-04 14:47:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 634 transitions, 11438 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 14:47:41,699 INFO L231 Difference]: Finished difference. Result has 368 places, 625 transitions, 10346 flow [2024-06-04 14:47:41,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10260, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10346, PETRI_PLACES=368, PETRI_TRANSITIONS=625} [2024-06-04 14:47:41,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-04 14:47:41,699 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 625 transitions, 10346 flow [2024-06-04 14:47:41,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:41,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:41,700 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 14:47:41,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:47:41,700 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 14:47:41,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1841860334, now seen corresponding path program 1 times [2024-06-04 14:47:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:41,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391590794] [2024-06-04 14:47:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:41,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:42,689 INFO 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 14:47:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391590794] [2024-06-04 14:47:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391590794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:42,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:42,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:42,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591094494] [2024-06-04 14:47:42,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:42,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:42,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 625 transitions, 10346 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:44,683 INFO L124 PetriNetUnfolderBase]: 4914/7420 cut-off events. [2024-06-04 14:47:44,684 INFO L125 PetriNetUnfolderBase]: For 1041850/1041858 co-relation queries the response was YES. [2024-06-04 14:47:44,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76258 conditions, 7420 events. 4914/7420 cut-off events. For 1041850/1041858 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40926 event pairs, 1613 based on Foata normal form. 1/7409 useless extension candidates. Maximal degree in co-relation 76090. Up to 7202 conditions per place. [2024-06-04 14:47:44,820 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 609 selfloop transitions, 25 changer transitions 0/647 dead transitions. [2024-06-04 14:47:44,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 647 transitions, 11962 flow [2024-06-04 14:47:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:47:44,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:47:44,822 INFO L175 Difference]: Start difference. First operand has 368 places, 625 transitions, 10346 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:47:44,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 647 transitions, 11962 flow [2024-06-04 14:47:46,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 647 transitions, 11890 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:47:46,864 INFO L231 Difference]: Finished difference. Result has 370 places, 631 transitions, 10460 flow [2024-06-04 14:47:46,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10460, PETRI_PLACES=370, PETRI_TRANSITIONS=631} [2024-06-04 14:47:46,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-04 14:47:46,865 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 631 transitions, 10460 flow [2024-06-04 14:47:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:46,865 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 14:47:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:47:46,865 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 14:47:46,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1841853824, now seen corresponding path program 2 times [2024-06-04 14:47:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318440047] [2024-06-04 14:47:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:47,862 INFO 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 14:47:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318440047] [2024-06-04 14:47:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318440047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:47,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:47,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63703013] [2024-06-04 14:47:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:47,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:47:47,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 631 transitions, 10460 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:47,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:47,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:47:47,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:49,766 INFO L124 PetriNetUnfolderBase]: 4919/7427 cut-off events. [2024-06-04 14:47:49,766 INFO L125 PetriNetUnfolderBase]: For 1065216/1065224 co-relation queries the response was YES. [2024-06-04 14:47:49,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76898 conditions, 7427 events. 4919/7427 cut-off events. For 1065216/1065224 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40988 event pairs, 1613 based on Foata normal form. 1/7416 useless extension candidates. Maximal degree in co-relation 76729. Up to 7208 conditions per place. [2024-06-04 14:47:49,869 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 607 selfloop transitions, 27 changer transitions 0/647 dead transitions. [2024-06-04 14:47:49,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 647 transitions, 12008 flow [2024-06-04 14:47:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 14:47:49,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987012987012986 [2024-06-04 14:47:49,871 INFO L175 Difference]: Start difference. First operand has 370 places, 631 transitions, 10460 flow. Second operand 7 states and 117 transitions. [2024-06-04 14:47:49,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 647 transitions, 12008 flow [2024-06-04 14:47:52,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 647 transitions, 11909 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-04 14:47:52,036 INFO L231 Difference]: Finished difference. Result has 374 places, 634 transitions, 10489 flow [2024-06-04 14:47:52,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10373, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10489, PETRI_PLACES=374, PETRI_TRANSITIONS=634} [2024-06-04 14:47:52,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-04 14:47:52,037 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 634 transitions, 10489 flow [2024-06-04 14:47:52,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:47:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:52,037 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 14:47:52,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:47:52,038 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 14:47:52,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1841853576, now seen corresponding path program 1 times [2024-06-04 14:47:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728719925] [2024-06-04 14:47:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:53,082 INFO 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 14:47:53,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:53,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728719925] [2024-06-04 14:47:53,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728719925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:53,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:53,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734782691] [2024-06-04 14:47:53,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:53,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:53,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 634 transitions, 10489 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 14:47:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:54,815 INFO L124 PetriNetUnfolderBase]: 4658/7154 cut-off events. [2024-06-04 14:47:54,816 INFO L125 PetriNetUnfolderBase]: For 1093811/1093875 co-relation queries the response was YES. [2024-06-04 14:47:54,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75151 conditions, 7154 events. 4658/7154 cut-off events. For 1093811/1093875 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40660 event pairs, 1497 based on Foata normal form. 23/7113 useless extension candidates. Maximal degree in co-relation 74980. Up to 6544 conditions per place. [2024-06-04 14:47:54,932 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 560 selfloop transitions, 26 changer transitions 0/658 dead transitions. [2024-06-04 14:47:54,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 658 transitions, 12001 flow [2024-06-04 14:47:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:47:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:47:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 14:47:54,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-04 14:47:54,934 INFO L175 Difference]: Start difference. First operand has 374 places, 634 transitions, 10489 flow. Second operand 7 states and 125 transitions. [2024-06-04 14:47:54,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 658 transitions, 12001 flow [2024-06-04 14:47:57,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 658 transitions, 11919 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:47:57,188 INFO L231 Difference]: Finished difference. Result has 378 places, 643 transitions, 10610 flow [2024-06-04 14:47:57,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10407, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10610, PETRI_PLACES=378, PETRI_TRANSITIONS=643} [2024-06-04 14:47:57,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-04 14:47:57,189 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 643 transitions, 10610 flow [2024-06-04 14:47:57,189 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 14:47:57,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:57,189 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 14:47:57,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:47:57,190 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 14:47:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 274438772, now seen corresponding path program 2 times [2024-06-04 14:47:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:57,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362781308] [2024-06-04 14:47:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:57,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:58,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:58,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362781308] [2024-06-04 14:47:58,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362781308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:58,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:58,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:47:58,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633079095] [2024-06-04 14:47:58,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:58,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:47:58,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:47:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:47:58,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:58,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 643 transitions, 10610 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 14:47:58,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:58,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:58,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:59,926 INFO L124 PetriNetUnfolderBase]: 4668/7170 cut-off events. [2024-06-04 14:47:59,926 INFO L125 PetriNetUnfolderBase]: For 1118034/1118098 co-relation queries the response was YES. [2024-06-04 14:48:00,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76059 conditions, 7170 events. 4668/7170 cut-off events. For 1118034/1118098 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40764 event pairs, 1495 based on Foata normal form. 23/7129 useless extension candidates. Maximal degree in co-relation 75886. Up to 6584 conditions per place. [2024-06-04 14:48:00,047 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 567 selfloop transitions, 17 changer transitions 0/656 dead transitions. [2024-06-04 14:48:00,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 656 transitions, 11870 flow [2024-06-04 14:48:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:48:00,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-04 14:48:00,049 INFO L175 Difference]: Start difference. First operand has 378 places, 643 transitions, 10610 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:48:00,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 656 transitions, 11870 flow [2024-06-04 14:48:02,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 656 transitions, 11808 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-04 14:48:02,198 INFO L231 Difference]: Finished difference. Result has 383 places, 646 transitions, 10655 flow [2024-06-04 14:48:02,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10550, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10655, PETRI_PLACES=383, PETRI_TRANSITIONS=646} [2024-06-04 14:48:02,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-04 14:48:02,199 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 646 transitions, 10655 flow [2024-06-04 14:48:02,199 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 14:48:02,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:02,199 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 14:48:02,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:48:02,200 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 14:48:02,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash -750966456, now seen corresponding path program 3 times [2024-06-04 14:48:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:02,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404992510] [2024-06-04 14:48:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:03,124 INFO 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 14:48:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404992510] [2024-06-04 14:48:03,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404992510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:03,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058448663] [2024-06-04 14:48:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:03,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:03,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:03,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:48:03,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 646 transitions, 10655 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:48:03,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:03,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:48:03,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:05,018 INFO L124 PetriNetUnfolderBase]: 4944/7466 cut-off events. [2024-06-04 14:48:05,018 INFO L125 PetriNetUnfolderBase]: For 1132640/1132648 co-relation queries the response was YES. [2024-06-04 14:48:05,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78458 conditions, 7466 events. 4944/7466 cut-off events. For 1132640/1132648 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41246 event pairs, 1611 based on Foata normal form. 1/7455 useless extension candidates. Maximal degree in co-relation 78282. Up to 7271 conditions per place. [2024-06-04 14:48:05,141 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 627 selfloop transitions, 15 changer transitions 0/655 dead transitions. [2024-06-04 14:48:05,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 655 transitions, 11967 flow [2024-06-04 14:48:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:48:05,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3538961038961039 [2024-06-04 14:48:05,143 INFO L175 Difference]: Start difference. First operand has 383 places, 646 transitions, 10655 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:48:05,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 655 transitions, 11967 flow [2024-06-04 14:48:08,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 655 transitions, 11853 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:08,053 INFO L231 Difference]: Finished difference. Result has 385 places, 646 transitions, 10577 flow [2024-06-04 14:48:08,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10541, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10577, PETRI_PLACES=385, PETRI_TRANSITIONS=646} [2024-06-04 14:48:08,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-04 14:48:08,054 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 646 transitions, 10577 flow [2024-06-04 14:48:08,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:48:08,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:08,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:48:08,055 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 14:48:08,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:08,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1605678216, now seen corresponding path program 3 times [2024-06-04 14:48:08,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:08,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356912487] [2024-06-04 14:48:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:08,994 INFO 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 14:48:08,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:08,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356912487] [2024-06-04 14:48:08,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356912487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:08,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:08,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513410585] [2024-06-04 14:48:08,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:09,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:09,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 646 transitions, 10577 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 14:48:09,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:09,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:09,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:10,912 INFO L124 PetriNetUnfolderBase]: 4659/7158 cut-off events. [2024-06-04 14:48:10,913 INFO L125 PetriNetUnfolderBase]: For 1148500/1148564 co-relation queries the response was YES. [2024-06-04 14:48:11,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76050 conditions, 7158 events. 4659/7158 cut-off events. For 1148500/1148564 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40842 event pairs, 1494 based on Foata normal form. 23/7117 useless extension candidates. Maximal degree in co-relation 75874. Up to 6564 conditions per place. [2024-06-04 14:48:11,046 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 563 selfloop transitions, 22 changer transitions 0/657 dead transitions. [2024-06-04 14:48:11,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 657 transitions, 11783 flow [2024-06-04 14:48:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:48:11,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:48:11,048 INFO L175 Difference]: Start difference. First operand has 385 places, 646 transitions, 10577 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:48:11,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 657 transitions, 11783 flow [2024-06-04 14:48:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 657 transitions, 11687 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 14:48:13,298 INFO L231 Difference]: Finished difference. Result has 385 places, 646 transitions, 10531 flow [2024-06-04 14:48:13,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10481, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10531, PETRI_PLACES=385, PETRI_TRANSITIONS=646} [2024-06-04 14:48:13,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-04 14:48:13,298 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 646 transitions, 10531 flow [2024-06-04 14:48:13,298 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 14:48:13,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:13,299 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 14:48:13,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:48:13,299 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:13,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1738482688, now seen corresponding path program 1 times [2024-06-04 14:48:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:13,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698753223] [2024-06-04 14:48:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:14,667 INFO 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 14:48:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698753223] [2024-06-04 14:48:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698753223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:14,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595354799] [2024-06-04 14:48:14,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:14,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:14,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:14,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:14,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 646 transitions, 10531 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:14,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:14,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:14,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:17,050 INFO L124 PetriNetUnfolderBase]: 4787/7315 cut-off events. [2024-06-04 14:48:17,050 INFO L125 PetriNetUnfolderBase]: For 1458952/1458981 co-relation queries the response was YES. [2024-06-04 14:48:17,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83612 conditions, 7315 events. 4787/7315 cut-off events. For 1458952/1458981 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41399 event pairs, 864 based on Foata normal form. 14/7292 useless extension candidates. Maximal degree in co-relation 83435. Up to 6530 conditions per place. [2024-06-04 14:48:17,179 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 86 changer transitions 0/691 dead transitions. [2024-06-04 14:48:17,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 691 transitions, 12111 flow [2024-06-04 14:48:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-04 14:48:17,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40702479338842973 [2024-06-04 14:48:17,181 INFO L175 Difference]: Start difference. First operand has 385 places, 646 transitions, 10531 flow. Second operand 11 states and 197 transitions. [2024-06-04 14:48:17,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 691 transitions, 12111 flow [2024-06-04 14:48:19,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 691 transitions, 12040 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:48:19,486 INFO L231 Difference]: Finished difference. Result has 390 places, 648 transitions, 10763 flow [2024-06-04 14:48:19,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10460, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10763, PETRI_PLACES=390, PETRI_TRANSITIONS=648} [2024-06-04 14:48:19,486 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-04 14:48:19,486 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 648 transitions, 10763 flow [2024-06-04 14:48:19,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:19,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:19,487 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 14:48:19,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:48:19,487 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:19,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1564798314, now seen corresponding path program 2 times [2024-06-04 14:48:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:19,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755260816] [2024-06-04 14:48:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:20,832 INFO 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 14:48:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755260816] [2024-06-04 14:48:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755260816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:20,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:20,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394749625] [2024-06-04 14:48:20,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:21,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:21,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 648 transitions, 10763 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:21,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:21,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:21,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:23,013 INFO L124 PetriNetUnfolderBase]: 4785/7341 cut-off events. [2024-06-04 14:48:23,013 INFO L125 PetriNetUnfolderBase]: For 1441375/1441398 co-relation queries the response was YES. [2024-06-04 14:48:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84364 conditions, 7341 events. 4785/7341 cut-off events. For 1441375/1441398 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41808 event pairs, 1090 based on Foata normal form. 14/7330 useless extension candidates. Maximal degree in co-relation 84186. Up to 6599 conditions per place. [2024-06-04 14:48:23,137 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 575 selfloop transitions, 84 changer transitions 0/695 dead transitions. [2024-06-04 14:48:23,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 695 transitions, 12480 flow [2024-06-04 14:48:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-04 14:48:23,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41115702479338845 [2024-06-04 14:48:23,138 INFO L175 Difference]: Start difference. First operand has 390 places, 648 transitions, 10763 flow. Second operand 11 states and 199 transitions. [2024-06-04 14:48:23,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 695 transitions, 12480 flow [2024-06-04 14:48:25,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 695 transitions, 12081 flow, removed 114 selfloop flow, removed 9 redundant places. [2024-06-04 14:48:25,868 INFO L231 Difference]: Finished difference. Result has 392 places, 652 transitions, 10799 flow [2024-06-04 14:48:25,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10482, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10799, PETRI_PLACES=392, PETRI_TRANSITIONS=652} [2024-06-04 14:48:25,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-04 14:48:25,869 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 652 transitions, 10799 flow [2024-06-04 14:48:25,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:25,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:25,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:48:25,869 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:25,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash -957008662, now seen corresponding path program 3 times [2024-06-04 14:48:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616053833] [2024-06-04 14:48:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616053833] [2024-06-04 14:48:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616053833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:27,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:27,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721997926] [2024-06-04 14:48:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:27,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:27,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 652 transitions, 10799 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:27,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:27,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:29,524 INFO L124 PetriNetUnfolderBase]: 4856/7461 cut-off events. [2024-06-04 14:48:29,525 INFO L125 PetriNetUnfolderBase]: For 1565085/1565112 co-relation queries the response was YES. [2024-06-04 14:48:29,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87087 conditions, 7461 events. 4856/7461 cut-off events. For 1565085/1565112 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42870 event pairs, 1026 based on Foata normal form. 8/7427 useless extension candidates. Maximal degree in co-relation 86908. Up to 6461 conditions per place. [2024-06-04 14:48:29,667 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 542 selfloop transitions, 122 changer transitions 0/700 dead transitions. [2024-06-04 14:48:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 700 transitions, 12863 flow [2024-06-04 14:48:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-04 14:48:29,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-04 14:48:29,669 INFO L175 Difference]: Start difference. First operand has 392 places, 652 transitions, 10799 flow. Second operand 11 states and 205 transitions. [2024-06-04 14:48:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 700 transitions, 12863 flow [2024-06-04 14:48:32,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 700 transitions, 12588 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-04 14:48:32,653 INFO L231 Difference]: Finished difference. Result has 394 places, 656 transitions, 11032 flow [2024-06-04 14:48:32,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11032, PETRI_PLACES=394, PETRI_TRANSITIONS=656} [2024-06-04 14:48:32,654 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-04 14:48:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 656 transitions, 11032 flow [2024-06-04 14:48:32,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:32,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:32,655 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 14:48:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:48:32,655 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -176968530, now seen corresponding path program 4 times [2024-06-04 14:48:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:32,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108801911] [2024-06-04 14:48:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108801911] [2024-06-04 14:48:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108801911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:34,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:34,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372932457] [2024-06-04 14:48:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:34,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:34,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:34,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 656 transitions, 11032 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:34,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:34,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:34,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:36,340 INFO L124 PetriNetUnfolderBase]: 4869/7500 cut-off events. [2024-06-04 14:48:36,341 INFO L125 PetriNetUnfolderBase]: For 1602037/1602064 co-relation queries the response was YES. [2024-06-04 14:48:36,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87490 conditions, 7500 events. 4869/7500 cut-off events. For 1602037/1602064 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43385 event pairs, 1065 based on Foata normal form. 12/7470 useless extension candidates. Maximal degree in co-relation 87310. Up to 6670 conditions per place. [2024-06-04 14:48:36,478 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 544 selfloop transitions, 120 changer transitions 0/700 dead transitions. [2024-06-04 14:48:36,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 700 transitions, 12652 flow [2024-06-04 14:48:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-04 14:48:36,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152892561983471 [2024-06-04 14:48:36,479 INFO L175 Difference]: Start difference. First operand has 394 places, 656 transitions, 11032 flow. Second operand 11 states and 201 transitions. [2024-06-04 14:48:36,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 700 transitions, 12652 flow [2024-06-04 14:48:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 700 transitions, 12355 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-04 14:48:39,521 INFO L231 Difference]: Finished difference. Result has 398 places, 658 transitions, 11123 flow [2024-06-04 14:48:39,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10755, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11123, PETRI_PLACES=398, PETRI_TRANSITIONS=658} [2024-06-04 14:48:39,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-04 14:48:39,522 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 658 transitions, 11123 flow [2024-06-04 14:48:39,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:39,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:39,523 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 14:48:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:48:39,523 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:39,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -924719062, now seen corresponding path program 5 times [2024-06-04 14:48:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:39,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020755431] [2024-06-04 14:48:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:40,896 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 14:48:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020755431] [2024-06-04 14:48:40,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020755431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:40,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:40,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:40,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853593005] [2024-06-04 14:48:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:40,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:40,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:41,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:41,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 658 transitions, 11123 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:41,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:41,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:41,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:43,231 INFO L124 PetriNetUnfolderBase]: 4861/7484 cut-off events. [2024-06-04 14:48:43,231 INFO L125 PetriNetUnfolderBase]: For 1597550/1597577 co-relation queries the response was YES. [2024-06-04 14:48:43,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87177 conditions, 7484 events. 4861/7484 cut-off events. For 1597550/1597577 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43202 event pairs, 1044 based on Foata normal form. 8/7450 useless extension candidates. Maximal degree in co-relation 86995. Up to 6587 conditions per place. [2024-06-04 14:48:43,365 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 544 selfloop transitions, 120 changer transitions 0/700 dead transitions. [2024-06-04 14:48:43,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 700 transitions, 12609 flow [2024-06-04 14:48:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-04 14:48:43,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41735537190082644 [2024-06-04 14:48:43,367 INFO L175 Difference]: Start difference. First operand has 398 places, 658 transitions, 11123 flow. Second operand 11 states and 202 transitions. [2024-06-04 14:48:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 700 transitions, 12609 flow [2024-06-04 14:48:46,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 700 transitions, 12209 flow, removed 97 selfloop flow, removed 8 redundant places. [2024-06-04 14:48:46,350 INFO L231 Difference]: Finished difference. Result has 401 places, 658 transitions, 10971 flow [2024-06-04 14:48:46,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10971, PETRI_PLACES=401, PETRI_TRANSITIONS=658} [2024-06-04 14:48:46,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-04 14:48:46,351 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 658 transitions, 10971 flow [2024-06-04 14:48:46,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:46,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:46,351 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 14:48:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:48:46,351 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 14:48:46,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash 936111698, now seen corresponding path program 2 times [2024-06-04 14:48:46,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:46,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448930947] [2024-06-04 14:48:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:46,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:47,267 INFO 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 14:48:47,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:47,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448930947] [2024-06-04 14:48:47,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448930947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:47,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:47,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:47,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7892585] [2024-06-04 14:48:47,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:47,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:47,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:47,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:48:47,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 658 transitions, 10971 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:48:47,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:47,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:48:47,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:49,511 INFO L124 PetriNetUnfolderBase]: 5029/7633 cut-off events. [2024-06-04 14:48:49,511 INFO L125 PetriNetUnfolderBase]: For 1509095/1509148 co-relation queries the response was YES. [2024-06-04 14:48:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85096 conditions, 7633 events. 5029/7633 cut-off events. For 1509095/1509148 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42983 event pairs, 1021 based on Foata normal form. 26/7617 useless extension candidates. Maximal degree in co-relation 84913. Up to 6915 conditions per place. [2024-06-04 14:48:49,637 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 517 selfloop transitions, 120 changer transitions 0/699 dead transitions. [2024-06-04 14:48:49,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 699 transitions, 12857 flow [2024-06-04 14:48:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:48:49,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-04 14:48:49,638 INFO L175 Difference]: Start difference. First operand has 401 places, 658 transitions, 10971 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:48:49,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 699 transitions, 12857 flow [2024-06-04 14:48:52,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 699 transitions, 12575 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 14:48:52,680 INFO L231 Difference]: Finished difference. Result has 401 places, 671 transitions, 11111 flow [2024-06-04 14:48:52,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10689, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11111, PETRI_PLACES=401, PETRI_TRANSITIONS=671} [2024-06-04 14:48:52,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-04 14:48:52,681 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 671 transitions, 11111 flow [2024-06-04 14:48:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:48:52,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:52,682 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 14:48:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:48:52,682 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:52,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637428, now seen corresponding path program 6 times [2024-06-04 14:48:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478157474] [2024-06-04 14:48:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:54,180 INFO 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 14:48:54,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:54,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478157474] [2024-06-04 14:48:54,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478157474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:54,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:54,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:48:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712775148] [2024-06-04 14:48:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:48:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:48:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:48:54,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:54,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 671 transitions, 11111 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:54,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:54,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:54,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:56,459 INFO L124 PetriNetUnfolderBase]: 4918/7581 cut-off events. [2024-06-04 14:48:56,460 INFO L125 PetriNetUnfolderBase]: For 1566227/1566245 co-relation queries the response was YES. [2024-06-04 14:48:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87370 conditions, 7581 events. 4918/7581 cut-off events. For 1566227/1566245 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43903 event pairs, 824 based on Foata normal form. 15/7585 useless extension candidates. Maximal degree in co-relation 87185. Up to 6787 conditions per place. [2024-06-04 14:48:56,602 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 598 selfloop transitions, 84 changer transitions 0/718 dead transitions. [2024-06-04 14:48:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 718 transitions, 12770 flow [2024-06-04 14:48:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:48:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:48:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-04 14:48:56,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132231404958678 [2024-06-04 14:48:56,604 INFO L175 Difference]: Start difference. First operand has 401 places, 671 transitions, 11111 flow. Second operand 11 states and 200 transitions. [2024-06-04 14:48:56,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 718 transitions, 12770 flow [2024-06-04 14:49:00,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 718 transitions, 12608 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:00,395 INFO L231 Difference]: Finished difference. Result has 408 places, 677 transitions, 11296 flow [2024-06-04 14:49:00,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11296, PETRI_PLACES=408, PETRI_TRANSITIONS=677} [2024-06-04 14:49:00,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-04 14:49:00,398 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 677 transitions, 11296 flow [2024-06-04 14:49:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:00,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:00,399 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 14:49:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:49:00,399 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:00,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash 265108108, now seen corresponding path program 7 times [2024-06-04 14:49:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:00,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671439218] [2024-06-04 14:49:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:01,963 INFO 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 14:49:01,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:01,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671439218] [2024-06-04 14:49:01,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671439218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:01,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:01,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043547526] [2024-06-04 14:49:01,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:01,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:02,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:02,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 677 transitions, 11296 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:02,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:02,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:02,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:04,493 INFO L124 PetriNetUnfolderBase]: 4985/7718 cut-off events. [2024-06-04 14:49:04,494 INFO L125 PetriNetUnfolderBase]: For 1625669/1625687 co-relation queries the response was YES. [2024-06-04 14:49:04,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89156 conditions, 7718 events. 4985/7718 cut-off events. For 1625669/1625687 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45183 event pairs, 846 based on Foata normal form. 15/7722 useless extension candidates. Maximal degree in co-relation 88970. Up to 6741 conditions per place. [2024-06-04 14:49:04,653 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 122 changer transitions 0/727 dead transitions. [2024-06-04 14:49:04,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 727 transitions, 13462 flow [2024-06-04 14:49:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-04 14:49:04,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-04 14:49:04,655 INFO L175 Difference]: Start difference. First operand has 408 places, 677 transitions, 11296 flow. Second operand 11 states and 205 transitions. [2024-06-04 14:49:04,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 727 transitions, 13462 flow [2024-06-04 14:49:08,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 727 transitions, 13185 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-04 14:49:08,348 INFO L231 Difference]: Finished difference. Result has 411 places, 685 transitions, 11595 flow [2024-06-04 14:49:08,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11595, PETRI_PLACES=411, PETRI_TRANSITIONS=685} [2024-06-04 14:49:08,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-04 14:49:08,349 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 685 transitions, 11595 flow [2024-06-04 14:49:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:08,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:08,350 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 14:49:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:49:08,350 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:08,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1983456464, now seen corresponding path program 8 times [2024-06-04 14:49:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809381908] [2024-06-04 14:49:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:09,891 INFO 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 14:49:09,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809381908] [2024-06-04 14:49:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809381908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:09,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:09,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:09,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464656884] [2024-06-04 14:49:09,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:09,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:09,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:09,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:09,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:10,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:10,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 685 transitions, 11595 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:10,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:10,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:10,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:12,325 INFO L124 PetriNetUnfolderBase]: 4973/7700 cut-off events. [2024-06-04 14:49:12,325 INFO L125 PetriNetUnfolderBase]: For 1641805/1641823 co-relation queries the response was YES. [2024-06-04 14:49:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88602 conditions, 7700 events. 4973/7700 cut-off events. For 1641805/1641823 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45067 event pairs, 856 based on Foata normal form. 19/7708 useless extension candidates. Maximal degree in co-relation 88414. Up to 6811 conditions per place. [2024-06-04 14:49:12,460 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 120 changer transitions 0/725 dead transitions. [2024-06-04 14:49:12,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 725 transitions, 13125 flow [2024-06-04 14:49:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-04 14:49:12,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41735537190082644 [2024-06-04 14:49:12,462 INFO L175 Difference]: Start difference. First operand has 411 places, 685 transitions, 11595 flow. Second operand 11 states and 202 transitions. [2024-06-04 14:49:12,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 725 transitions, 13125 flow [2024-06-04 14:49:16,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 725 transitions, 12759 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:16,436 INFO L231 Difference]: Finished difference. Result has 416 places, 685 transitions, 11485 flow [2024-06-04 14:49:16,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11229, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11485, PETRI_PLACES=416, PETRI_TRANSITIONS=685} [2024-06-04 14:49:16,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-04 14:49:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 685 transitions, 11485 flow [2024-06-04 14:49:16,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:16,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:16,438 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 14:49:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:49:16,438 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1983336494, now seen corresponding path program 9 times [2024-06-04 14:49:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:16,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036261045] [2024-06-04 14:49:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:17,822 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 14:49:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036261045] [2024-06-04 14:49:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036261045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:17,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:17,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422874537] [2024-06-04 14:49:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:17,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:17,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:17,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:17,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 685 transitions, 11485 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:17,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:17,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:20,052 INFO L124 PetriNetUnfolderBase]: 5017/7776 cut-off events. [2024-06-04 14:49:20,052 INFO L125 PetriNetUnfolderBase]: For 1669795/1669813 co-relation queries the response was YES. [2024-06-04 14:49:20,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89641 conditions, 7776 events. 5017/7776 cut-off events. For 1669795/1669813 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 45602 event pairs, 852 based on Foata normal form. 15/7780 useless extension candidates. Maximal degree in co-relation 89451. Up to 6675 conditions per place. [2024-06-04 14:49:20,205 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 565 selfloop transitions, 128 changer transitions 0/729 dead transitions. [2024-06-04 14:49:20,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 729 transitions, 13163 flow [2024-06-04 14:49:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-04 14:49:20,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214876033057851 [2024-06-04 14:49:20,207 INFO L175 Difference]: Start difference. First operand has 416 places, 685 transitions, 11485 flow. Second operand 11 states and 204 transitions. [2024-06-04 14:49:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 729 transitions, 13163 flow [2024-06-04 14:49:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 729 transitions, 12959 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:23,777 INFO L231 Difference]: Finished difference. Result has 419 places, 689 transitions, 11703 flow [2024-06-04 14:49:23,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11281, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11703, PETRI_PLACES=419, PETRI_TRANSITIONS=689} [2024-06-04 14:49:23,777 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 374 predicate places. [2024-06-04 14:49:23,778 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 689 transitions, 11703 flow [2024-06-04 14:49:23,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:23,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:23,778 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 14:49:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:49:23,778 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 14:49:23,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1620722701, now seen corresponding path program 1 times [2024-06-04 14:49:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:23,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104584099] [2024-06-04 14:49:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:24,753 INFO 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 14:49:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:24,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104584099] [2024-06-04 14:49:24,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104584099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:24,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:24,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:24,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894511440] [2024-06-04 14:49:24,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:24,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:24,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:24,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:24,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:49:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 689 transitions, 11703 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:49:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:49:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:26,855 INFO L124 PetriNetUnfolderBase]: 5242/7984 cut-off events. [2024-06-04 14:49:26,855 INFO L125 PetriNetUnfolderBase]: For 1681944/1681985 co-relation queries the response was YES. [2024-06-04 14:49:26,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89892 conditions, 7984 events. 5242/7984 cut-off events. For 1681944/1681985 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 45855 event pairs, 1387 based on Foata normal form. 13/7943 useless extension candidates. Maximal degree in co-relation 89701. Up to 7489 conditions per place. [2024-06-04 14:49:26,998 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 618 selfloop transitions, 37 changer transitions 0/717 dead transitions. [2024-06-04 14:49:26,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 717 transitions, 13431 flow [2024-06-04 14:49:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:49:26,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-04 14:49:27,000 INFO L175 Difference]: Start difference. First operand has 419 places, 689 transitions, 11703 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:49:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 717 transitions, 13431 flow [2024-06-04 14:49:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 717 transitions, 13025 flow, removed 65 selfloop flow, removed 10 redundant places. [2024-06-04 14:49:31,022 INFO L231 Difference]: Finished difference. Result has 417 places, 695 transitions, 11528 flow [2024-06-04 14:49:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11528, PETRI_PLACES=417, PETRI_TRANSITIONS=695} [2024-06-04 14:49:31,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-04 14:49:31,023 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 695 transitions, 11528 flow [2024-06-04 14:49:31,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:49:31,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:31,023 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 14:49:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:49:31,023 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:31,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash -632243300, now seen corresponding path program 10 times [2024-06-04 14:49:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164900328] [2024-06-04 14:49:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:32,533 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 14:49:32,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164900328] [2024-06-04 14:49:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164900328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:32,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:32,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85766717] [2024-06-04 14:49:32,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:32,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:32,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 695 transitions, 11528 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:32,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:32,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:32,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:34,992 INFO L124 PetriNetUnfolderBase]: 5057/7845 cut-off events. [2024-06-04 14:49:34,992 INFO L125 PetriNetUnfolderBase]: For 1758429/1758446 co-relation queries the response was YES. [2024-06-04 14:49:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91194 conditions, 7845 events. 5057/7845 cut-off events. For 1758429/1758446 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46234 event pairs, 850 based on Foata normal form. 20/7858 useless extension candidates. Maximal degree in co-relation 91002. Up to 6495 conditions per place. [2024-06-04 14:49:35,141 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 527 selfloop transitions, 173 changer transitions 0/738 dead transitions. [2024-06-04 14:49:35,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 738 transitions, 13232 flow [2024-06-04 14:49:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-04 14:49:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-04 14:49:35,143 INFO L175 Difference]: Start difference. First operand has 417 places, 695 transitions, 11528 flow. Second operand 11 states and 208 transitions. [2024-06-04 14:49:35,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 738 transitions, 13232 flow [2024-06-04 14:49:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 738 transitions, 13110 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:38,661 INFO L231 Difference]: Finished difference. Result has 424 places, 697 transitions, 11906 flow [2024-06-04 14:49:38,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11906, PETRI_PLACES=424, PETRI_TRANSITIONS=697} [2024-06-04 14:49:38,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-04 14:49:38,662 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 697 transitions, 11906 flow [2024-06-04 14:49:38,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:38,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:38,662 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 14:49:38,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:49:38,662 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1515889870, now seen corresponding path program 11 times [2024-06-04 14:49:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711912450] [2024-06-04 14:49:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:40,061 INFO 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 14:49:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:40,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711912450] [2024-06-04 14:49:40,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711912450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:40,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451317886] [2024-06-04 14:49:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:40,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:40,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 697 transitions, 11906 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:40,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:40,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:40,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:42,484 INFO L124 PetriNetUnfolderBase]: 5163/8021 cut-off events. [2024-06-04 14:49:42,484 INFO L125 PetriNetUnfolderBase]: For 1909896/1909913 co-relation queries the response was YES. [2024-06-04 14:49:42,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94416 conditions, 8021 events. 5163/8021 cut-off events. For 1909896/1909913 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 47568 event pairs, 824 based on Foata normal form. 40/8054 useless extension candidates. Maximal degree in co-relation 94222. Up to 6546 conditions per place. [2024-06-04 14:49:42,640 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 514 selfloop transitions, 192 changer transitions 0/744 dead transitions. [2024-06-04 14:49:42,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 744 transitions, 13666 flow [2024-06-04 14:49:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-04 14:49:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-04 14:49:42,642 INFO L175 Difference]: Start difference. First operand has 424 places, 697 transitions, 11906 flow. Second operand 11 states and 210 transitions. [2024-06-04 14:49:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 744 transitions, 13666 flow [2024-06-04 14:49:46,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 744 transitions, 13186 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-04 14:49:46,925 INFO L231 Difference]: Finished difference. Result has 426 places, 699 transitions, 11970 flow [2024-06-04 14:49:46,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11426, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11970, PETRI_PLACES=426, PETRI_TRANSITIONS=699} [2024-06-04 14:49:46,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-04 14:49:46,926 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 699 transitions, 11970 flow [2024-06-04 14:49:46,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:46,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:46,927 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 14:49:46,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:49:46,927 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:46,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1522318960, now seen corresponding path program 12 times [2024-06-04 14:49:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218065871] [2024-06-04 14:49:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:48,459 INFO 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 14:49:48,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218065871] [2024-06-04 14:49:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218065871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:48,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:48,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721072299] [2024-06-04 14:49:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:48,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:48,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:48,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:48,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 699 transitions, 11970 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:48,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:48,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:48,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:50,844 INFO L124 PetriNetUnfolderBase]: 5176/8050 cut-off events. [2024-06-04 14:49:50,844 INFO L125 PetriNetUnfolderBase]: For 1845194/1845211 co-relation queries the response was YES. [2024-06-04 14:49:50,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94559 conditions, 8050 events. 5176/8050 cut-off events. For 1845194/1845211 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 47946 event pairs, 832 based on Foata normal form. 20/8063 useless extension candidates. Maximal degree in co-relation 94364. Up to 6685 conditions per place. [2024-06-04 14:49:51,029 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 523 selfloop transitions, 181 changer transitions 0/742 dead transitions. [2024-06-04 14:49:51,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 742 transitions, 13690 flow [2024-06-04 14:49:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:49:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:49:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-04 14:49:51,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42768595041322316 [2024-06-04 14:49:51,031 INFO L175 Difference]: Start difference. First operand has 426 places, 699 transitions, 11970 flow. Second operand 11 states and 207 transitions. [2024-06-04 14:49:51,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 742 transitions, 13690 flow [2024-06-04 14:49:55,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 742 transitions, 13198 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-04 14:49:55,566 INFO L231 Difference]: Finished difference. Result has 428 places, 701 transitions, 12002 flow [2024-06-04 14:49:55,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11478, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12002, PETRI_PLACES=428, PETRI_TRANSITIONS=701} [2024-06-04 14:49:55,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-04 14:49:55,566 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 701 transitions, 12002 flow [2024-06-04 14:49:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:55,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:55,567 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 14:49:55,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:49:55,567 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1515643606, now seen corresponding path program 1 times [2024-06-04 14:49:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300674953] [2024-06-04 14:49:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:56,940 INFO 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 14:49:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300674953] [2024-06-04 14:49:56,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300674953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:56,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:56,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:49:56,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126029067] [2024-06-04 14:49:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:56,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:49:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:49:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:49:57,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:49:57,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 701 transitions, 12002 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 14:49:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:49:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:59,629 INFO L124 PetriNetUnfolderBase]: 5775/8718 cut-off events. [2024-06-04 14:49:59,629 INFO L125 PetriNetUnfolderBase]: For 1983455/1983467 co-relation queries the response was YES. [2024-06-04 14:49:59,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97958 conditions, 8718 events. 5775/8718 cut-off events. For 1983455/1983467 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49638 event pairs, 991 based on Foata normal form. 36/8741 useless extension candidates. Maximal degree in co-relation 97762. Up to 7453 conditions per place. [2024-06-04 14:49:59,802 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 527 selfloop transitions, 198 changer transitions 0/753 dead transitions. [2024-06-04 14:49:59,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 753 transitions, 13808 flow [2024-06-04 14:49:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:49:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:49:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-04 14:49:59,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:49:59,805 INFO L175 Difference]: Start difference. First operand has 428 places, 701 transitions, 12002 flow. Second operand 12 states and 216 transitions. [2024-06-04 14:49:59,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 753 transitions, 13808 flow [2024-06-04 14:50:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 753 transitions, 13304 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:04,887 INFO L231 Difference]: Finished difference. Result has 431 places, 703 transitions, 12038 flow [2024-06-04 14:50:04,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11498, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12038, PETRI_PLACES=431, PETRI_TRANSITIONS=703} [2024-06-04 14:50:04,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-04 14:50:04,888 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 703 transitions, 12038 flow [2024-06-04 14:50:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 14:50:04,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:04,888 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 14:50:04,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:50:04,888 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:04,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1522323610, now seen corresponding path program 13 times [2024-06-04 14:50:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941081703] [2024-06-04 14:50:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:04,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:06,278 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 14:50:06,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:06,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941081703] [2024-06-04 14:50:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941081703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:06,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556842872] [2024-06-04 14:50:06,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:06,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:06,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:06,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 703 transitions, 12038 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:06,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:06,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:06,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:08,726 INFO L124 PetriNetUnfolderBase]: 5282/8226 cut-off events. [2024-06-04 14:50:08,727 INFO L125 PetriNetUnfolderBase]: For 1889633/1889660 co-relation queries the response was YES. [2024-06-04 14:50:08,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96231 conditions, 8226 events. 5282/8226 cut-off events. For 1889633/1889660 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 49224 event pairs, 853 based on Foata normal form. 16/8221 useless extension candidates. Maximal degree in co-relation 96034. Up to 6656 conditions per place. [2024-06-04 14:50:08,888 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 525 selfloop transitions, 187 changer transitions 0/750 dead transitions. [2024-06-04 14:50:08,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 750 transitions, 13816 flow [2024-06-04 14:50:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-04 14:50:08,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-04 14:50:08,889 INFO L175 Difference]: Start difference. First operand has 431 places, 703 transitions, 12038 flow. Second operand 11 states and 211 transitions. [2024-06-04 14:50:08,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 750 transitions, 13816 flow [2024-06-04 14:50:13,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 750 transitions, 13318 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-04 14:50:13,234 INFO L231 Difference]: Finished difference. Result has 432 places, 705 transitions, 12082 flow [2024-06-04 14:50:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11540, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12082, PETRI_PLACES=432, PETRI_TRANSITIONS=705} [2024-06-04 14:50:13,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-04 14:50:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 705 transitions, 12082 flow [2024-06-04 14:50:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:13,235 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 14:50:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:50:13,235 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1693026040, now seen corresponding path program 14 times [2024-06-04 14:50:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702308971] [2024-06-04 14:50:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:14,698 INFO 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 14:50:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702308971] [2024-06-04 14:50:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702308971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215415982] [2024-06-04 14:50:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:14,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:14,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 705 transitions, 12082 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:14,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:14,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:17,333 INFO L124 PetriNetUnfolderBase]: 5307/8281 cut-off events. [2024-06-04 14:50:17,333 INFO L125 PetriNetUnfolderBase]: For 1928810/1928827 co-relation queries the response was YES. [2024-06-04 14:50:17,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96234 conditions, 8281 events. 5307/8281 cut-off events. For 1928810/1928827 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49823 event pairs, 890 based on Foata normal form. 16/8290 useless extension candidates. Maximal degree in co-relation 96036. Up to 6839 conditions per place. [2024-06-04 14:50:17,486 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 533 selfloop transitions, 177 changer transitions 0/748 dead transitions. [2024-06-04 14:50:17,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 748 transitions, 13820 flow [2024-06-04 14:50:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-04 14:50:17,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:50:17,487 INFO L175 Difference]: Start difference. First operand has 432 places, 705 transitions, 12082 flow. Second operand 11 states and 209 transitions. [2024-06-04 14:50:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 748 transitions, 13820 flow [2024-06-04 14:50:21,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 748 transitions, 13298 flow, removed 76 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:21,770 INFO L231 Difference]: Finished difference. Result has 434 places, 707 transitions, 12086 flow [2024-06-04 14:50:21,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11560, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12086, PETRI_PLACES=434, PETRI_TRANSITIONS=707} [2024-06-04 14:50:21,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-04 14:50:21,770 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 707 transitions, 12086 flow [2024-06-04 14:50:21,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:21,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:21,771 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 14:50:21,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:50:21,771 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:21,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1693141360, now seen corresponding path program 15 times [2024-06-04 14:50:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834229690] [2024-06-04 14:50:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:23,251 INFO 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 14:50:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834229690] [2024-06-04 14:50:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834229690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:23,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:50:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704036788] [2024-06-04 14:50:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:50:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:50:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:50:23,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:23,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 707 transitions, 12086 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:23,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:23,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:23,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:25,753 INFO L124 PetriNetUnfolderBase]: 5316/8305 cut-off events. [2024-06-04 14:50:25,753 INFO L125 PetriNetUnfolderBase]: For 1967942/1967964 co-relation queries the response was YES. [2024-06-04 14:50:25,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96750 conditions, 8305 events. 5316/8305 cut-off events. For 1967942/1967964 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50055 event pairs, 900 based on Foata normal form. 16/8307 useless extension candidates. Maximal degree in co-relation 96551. Up to 6524 conditions per place. [2024-06-04 14:50:25,911 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 524 selfloop transitions, 192 changer transitions 0/754 dead transitions. [2024-06-04 14:50:25,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 754 transitions, 13876 flow [2024-06-04 14:50:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-04 14:50:25,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-04 14:50:25,913 INFO L175 Difference]: Start difference. First operand has 434 places, 707 transitions, 12086 flow. Second operand 11 states and 212 transitions. [2024-06-04 14:50:25,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 754 transitions, 13876 flow [2024-06-04 14:50:30,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 754 transitions, 13370 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:30,602 INFO L231 Difference]: Finished difference. Result has 436 places, 709 transitions, 12140 flow [2024-06-04 14:50:30,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11580, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12140, PETRI_PLACES=436, PETRI_TRANSITIONS=709} [2024-06-04 14:50:30,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-04 14:50:30,603 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 709 transitions, 12140 flow [2024-06-04 14:50:30,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:30,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:30,603 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 14:50:30,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:50:30,604 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 14:50:30,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:30,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1621085065, now seen corresponding path program 2 times [2024-06-04 14:50:30,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:30,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378104762] [2024-06-04 14:50:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:30,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:31,529 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 14:50:31,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:31,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378104762] [2024-06-04 14:50:31,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378104762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:31,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:31,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586984133] [2024-06-04 14:50:31,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:31,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:31,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:31,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:50:31,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 709 transitions, 12140 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:50:31,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:31,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:50:31,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:33,767 INFO L124 PetriNetUnfolderBase]: 5568/8529 cut-off events. [2024-06-04 14:50:33,767 INFO L125 PetriNetUnfolderBase]: For 1988913/1988954 co-relation queries the response was YES. [2024-06-04 14:50:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96866 conditions, 8529 events. 5568/8529 cut-off events. For 1988913/1988954 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50133 event pairs, 1472 based on Foata normal form. 13/8474 useless extension candidates. Maximal degree in co-relation 96666. Up to 8054 conditions per place. [2024-06-04 14:50:33,931 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 634 selfloop transitions, 31 changer transitions 0/727 dead transitions. [2024-06-04 14:50:33,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 727 transitions, 13530 flow [2024-06-04 14:50:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:50:33,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-04 14:50:33,932 INFO L175 Difference]: Start difference. First operand has 436 places, 709 transitions, 12140 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:50:33,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 727 transitions, 13530 flow [2024-06-04 14:50:39,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 727 transitions, 12960 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:39,083 INFO L231 Difference]: Finished difference. Result has 435 places, 709 transitions, 11638 flow [2024-06-04 14:50:39,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11570, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11638, PETRI_PLACES=435, PETRI_TRANSITIONS=709} [2024-06-04 14:50:39,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 390 predicate places. [2024-06-04 14:50:39,084 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 709 transitions, 11638 flow [2024-06-04 14:50:39,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:50:39,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:39,084 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 14:50:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:50:39,085 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 14:50:39,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1676469631, now seen corresponding path program 1 times [2024-06-04 14:50:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953783199] [2024-06-04 14:50:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:40,005 INFO 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 14:50:40,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953783199] [2024-06-04 14:50:40,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953783199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:40,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:40,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464117377] [2024-06-04 14:50:40,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:40,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:40,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:50:40,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 709 transitions, 11638 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:50:40,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:40,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:50:40,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:42,458 INFO L124 PetriNetUnfolderBase]: 5578/8543 cut-off events. [2024-06-04 14:50:42,458 INFO L125 PetriNetUnfolderBase]: For 2007563/2007604 co-relation queries the response was YES. [2024-06-04 14:50:42,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95869 conditions, 8543 events. 5578/8543 cut-off events. For 2007563/2007604 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50257 event pairs, 1473 based on Foata normal form. 14/8489 useless extension candidates. Maximal degree in co-relation 95668. Up to 8027 conditions per place. [2024-06-04 14:50:42,644 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 628 selfloop transitions, 47 changer transitions 0/737 dead transitions. [2024-06-04 14:50:42,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 737 transitions, 13400 flow [2024-06-04 14:50:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:50:42,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:50:42,646 INFO L175 Difference]: Start difference. First operand has 435 places, 709 transitions, 11638 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:50:42,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 737 transitions, 13400 flow [2024-06-04 14:50:47,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 737 transitions, 13338 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:47,275 INFO L231 Difference]: Finished difference. Result has 439 places, 715 transitions, 11806 flow [2024-06-04 14:50:47,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11576, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11806, PETRI_PLACES=439, PETRI_TRANSITIONS=715} [2024-06-04 14:50:47,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-04 14:50:47,276 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 715 transitions, 11806 flow [2024-06-04 14:50:47,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:50:47,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:47,276 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 14:50:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:50:47,277 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 14:50:47,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1621081500, now seen corresponding path program 3 times [2024-06-04 14:50:47,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:47,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672818181] [2024-06-04 14:50:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672818181] [2024-06-04 14:50:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672818181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:48,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:48,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133978091] [2024-06-04 14:50:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:48,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:50:48,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 715 transitions, 11806 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:50:48,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:48,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:50:48,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:50,750 INFO L124 PetriNetUnfolderBase]: 5587/8552 cut-off events. [2024-06-04 14:50:50,750 INFO L125 PetriNetUnfolderBase]: For 2042955/2042992 co-relation queries the response was YES. [2024-06-04 14:50:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96661 conditions, 8552 events. 5587/8552 cut-off events. For 2042955/2042992 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50178 event pairs, 1009 based on Foata normal form. 14/8498 useless extension candidates. Maximal degree in co-relation 96459. Up to 7832 conditions per place. [2024-06-04 14:50:50,916 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 562 selfloop transitions, 124 changer transitions 0/748 dead transitions. [2024-06-04 14:50:50,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 748 transitions, 14030 flow [2024-06-04 14:50:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:50:50,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-04 14:50:50,918 INFO L175 Difference]: Start difference. First operand has 439 places, 715 transitions, 11806 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:50:50,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 748 transitions, 14030 flow [2024-06-04 14:50:56,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 748 transitions, 13897 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:56,785 INFO L231 Difference]: Finished difference. Result has 443 places, 720 transitions, 12007 flow [2024-06-04 14:50:56,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11673, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12007, PETRI_PLACES=443, PETRI_TRANSITIONS=720} [2024-06-04 14:50:56,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-04 14:50:56,786 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 720 transitions, 12007 flow [2024-06-04 14:50:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:50:56,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:56,787 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 14:50:56,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:50:56,788 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 14:50:56,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1621094520, now seen corresponding path program 4 times [2024-06-04 14:50:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:56,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598975127] [2024-06-04 14:50:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:57,712 INFO 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 14:50:57,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:57,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598975127] [2024-06-04 14:50:57,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598975127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:57,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:57,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:57,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779185460] [2024-06-04 14:50:57,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:57,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:57,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:50:57,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 720 transitions, 12007 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:50:57,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:57,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:50:57,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:00,289 INFO L124 PetriNetUnfolderBase]: 5581/8543 cut-off events. [2024-06-04 14:51:00,289 INFO L125 PetriNetUnfolderBase]: For 2064173/2064210 co-relation queries the response was YES. [2024-06-04 14:51:00,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96775 conditions, 8543 events. 5581/8543 cut-off events. For 2064173/2064210 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50093 event pairs, 1008 based on Foata normal form. 14/8489 useless extension candidates. Maximal degree in co-relation 96572. Up to 7827 conditions per place. [2024-06-04 14:51:00,445 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 555 selfloop transitions, 129 changer transitions 0/746 dead transitions. [2024-06-04 14:51:00,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 746 transitions, 13921 flow [2024-06-04 14:51:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 14:51:00,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-04 14:51:00,447 INFO L175 Difference]: Start difference. First operand has 443 places, 720 transitions, 12007 flow. Second operand 9 states and 158 transitions. [2024-06-04 14:51:00,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 746 transitions, 13921 flow [2024-06-04 14:51:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 746 transitions, 13600 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:05,773 INFO L231 Difference]: Finished difference. Result has 446 places, 720 transitions, 11952 flow [2024-06-04 14:51:05,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11686, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11952, PETRI_PLACES=446, PETRI_TRANSITIONS=720} [2024-06-04 14:51:05,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-04 14:51:05,774 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 720 transitions, 11952 flow [2024-06-04 14:51:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 14:51:05,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:05,774 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 14:51:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:51:05,774 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:05,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 532271454, now seen corresponding path program 16 times [2024-06-04 14:51:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861823007] [2024-06-04 14:51:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:05,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:07,260 INFO 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 14:51:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861823007] [2024-06-04 14:51:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861823007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:07,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:07,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:51:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121382847] [2024-06-04 14:51:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:51:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:51:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:51:07,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:07,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 720 transitions, 11952 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:07,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:07,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:07,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:09,896 INFO L124 PetriNetUnfolderBase]: 5389/8406 cut-off events. [2024-06-04 14:51:09,897 INFO L125 PetriNetUnfolderBase]: For 2227226/2227257 co-relation queries the response was YES. [2024-06-04 14:51:10,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99396 conditions, 8406 events. 5389/8406 cut-off events. For 2227226/2227257 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50813 event pairs, 1001 based on Foata normal form. 15/8377 useless extension candidates. Maximal degree in co-relation 99192. Up to 7200 conditions per place. [2024-06-04 14:51:10,082 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 610 selfloop transitions, 112 changer transitions 0/760 dead transitions. [2024-06-04 14:51:10,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 760 transitions, 13702 flow [2024-06-04 14:51:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-04 14:51:10,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:51:10,084 INFO L175 Difference]: Start difference. First operand has 446 places, 720 transitions, 11952 flow. Second operand 10 states and 180 transitions. [2024-06-04 14:51:10,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 760 transitions, 13702 flow [2024-06-04 14:51:14,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 760 transitions, 13456 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:15,009 INFO L231 Difference]: Finished difference. Result has 449 places, 722 transitions, 12127 flow [2024-06-04 14:51:15,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11706, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12127, PETRI_PLACES=449, PETRI_TRANSITIONS=722} [2024-06-04 14:51:15,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-04 14:51:15,010 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 722 transitions, 12127 flow [2024-06-04 14:51:15,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:15,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:15,011 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 14:51:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:51:15,011 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:15,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash 590363904, now seen corresponding path program 17 times [2024-06-04 14:51:15,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:15,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274150399] [2024-06-04 14:51:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:15,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:16,626 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 14:51:16,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274150399] [2024-06-04 14:51:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274150399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:16,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:16,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:51:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550815480] [2024-06-04 14:51:16,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:51:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:51:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:51:16,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:16,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 722 transitions, 12127 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:16,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:16,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:19,237 INFO L124 PetriNetUnfolderBase]: 5447/8517 cut-off events. [2024-06-04 14:51:19,238 INFO L125 PetriNetUnfolderBase]: For 2340139/2340168 co-relation queries the response was YES. [2024-06-04 14:51:19,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103659 conditions, 8517 events. 5447/8517 cut-off events. For 2340139/2340168 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 52003 event pairs, 1129 based on Foata normal form. 9/8477 useless extension candidates. Maximal degree in co-relation 103454. Up to 6777 conditions per place. [2024-06-04 14:51:19,418 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 538 selfloop transitions, 190 changer transitions 0/766 dead transitions. [2024-06-04 14:51:19,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 766 transitions, 14471 flow [2024-06-04 14:51:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:51:19,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:51:19,420 INFO L175 Difference]: Start difference. First operand has 449 places, 722 transitions, 12127 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:51:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 766 transitions, 14471 flow [2024-06-04 14:51:25,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 766 transitions, 14056 flow, removed 106 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:25,522 INFO L231 Difference]: Finished difference. Result has 451 places, 726 transitions, 12468 flow [2024-06-04 14:51:25,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12468, PETRI_PLACES=451, PETRI_TRANSITIONS=726} [2024-06-04 14:51:25,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-04 14:51:25,522 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 726 transitions, 12468 flow [2024-06-04 14:51:25,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:25,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:25,523 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 14:51:25,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:51:25,523 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:25,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash -167189412, now seen corresponding path program 18 times [2024-06-04 14:51:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:25,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014075203] [2024-06-04 14:51:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:27,336 INFO 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 14:51:27,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:27,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014075203] [2024-06-04 14:51:27,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014075203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:27,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:27,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:51:27,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217702948] [2024-06-04 14:51:27,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:27,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:51:27,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:51:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:51:27,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:27,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 726 transitions, 12468 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:27,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:27,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:27,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:30,323 INFO L124 PetriNetUnfolderBase]: 5460/8556 cut-off events. [2024-06-04 14:51:30,323 INFO L125 PetriNetUnfolderBase]: For 2256877/2256906 co-relation queries the response was YES. [2024-06-04 14:51:30,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102500 conditions, 8556 events. 5460/8556 cut-off events. For 2256877/2256906 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 52503 event pairs, 1176 based on Foata normal form. 13/8520 useless extension candidates. Maximal degree in co-relation 102294. Up to 7255 conditions per place. [2024-06-04 14:51:30,477 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 552 selfloop transitions, 176 changer transitions 0/766 dead transitions. [2024-06-04 14:51:30,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 766 transitions, 14238 flow [2024-06-04 14:51:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-04 14:51:30,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-04 14:51:30,479 INFO L175 Difference]: Start difference. First operand has 451 places, 726 transitions, 12468 flow. Second operand 10 states and 183 transitions. [2024-06-04 14:51:30,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 766 transitions, 14238 flow [2024-06-04 14:51:35,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 766 transitions, 13852 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:35,649 INFO L231 Difference]: Finished difference. Result has 454 places, 728 transitions, 12630 flow [2024-06-04 14:51:35,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12102, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12630, PETRI_PLACES=454, PETRI_TRANSITIONS=728} [2024-06-04 14:51:35,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-04 14:51:35,649 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 728 transitions, 12630 flow [2024-06-04 14:51:35,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:35,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:35,650 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 14:51:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:51:35,650 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:35,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -167194062, now seen corresponding path program 19 times [2024-06-04 14:51:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:35,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556359615] [2024-06-04 14:51:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:37,293 INFO 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 14:51:37,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:37,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556359615] [2024-06-04 14:51:37,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556359615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:37,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:37,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:51:37,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712177375] [2024-06-04 14:51:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:51:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:51:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:51:37,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:37,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 728 transitions, 12630 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:37,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:37,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:37,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:40,537 INFO L124 PetriNetUnfolderBase]: 5452/8540 cut-off events. [2024-06-04 14:51:40,537 INFO L125 PetriNetUnfolderBase]: For 2195876/2195905 co-relation queries the response was YES. [2024-06-04 14:51:40,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101558 conditions, 8540 events. 5452/8540 cut-off events. For 2195876/2195905 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 52333 event pairs, 1138 based on Foata normal form. 9/8500 useless extension candidates. Maximal degree in co-relation 101351. Up to 7067 conditions per place. [2024-06-04 14:51:40,688 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 548 selfloop transitions, 180 changer transitions 0/766 dead transitions. [2024-06-04 14:51:40,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 766 transitions, 14232 flow [2024-06-04 14:51:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:51:40,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-04 14:51:40,690 INFO L175 Difference]: Start difference. First operand has 454 places, 728 transitions, 12630 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:51:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 766 transitions, 14232 flow [2024-06-04 14:51:44,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 766 transitions, 13626 flow, removed 127 selfloop flow, removed 10 redundant places. [2024-06-04 14:51:44,764 INFO L231 Difference]: Finished difference. Result has 454 places, 728 transitions, 12400 flow [2024-06-04 14:51:44,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12024, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12400, PETRI_PLACES=454, PETRI_TRANSITIONS=728} [2024-06-04 14:51:44,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-04 14:51:44,765 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 728 transitions, 12400 flow [2024-06-04 14:51:44,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:44,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:44,765 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 14:51:44,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:51:44,765 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 14:51:44,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2055759727, now seen corresponding path program 3 times [2024-06-04 14:51:44,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:44,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54150442] [2024-06-04 14:51:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:45,667 INFO 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 14:51:45,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54150442] [2024-06-04 14:51:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54150442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:45,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053116423] [2024-06-04 14:51:45,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:45,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:45,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:51:45,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 728 transitions, 12400 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:51:45,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:45,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:51:45,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:48,614 INFO L124 PetriNetUnfolderBase]: 5710/8757 cut-off events. [2024-06-04 14:51:48,615 INFO L125 PetriNetUnfolderBase]: For 2021756/2021797 co-relation queries the response was YES. [2024-06-04 14:51:48,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98454 conditions, 8757 events. 5710/8757 cut-off events. For 2021756/2021797 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 51955 event pairs, 1477 based on Foata normal form. 13/8695 useless extension candidates. Maximal degree in co-relation 98248. Up to 8245 conditions per place. [2024-06-04 14:51:48,883 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 646 selfloop transitions, 44 changer transitions 0/752 dead transitions. [2024-06-04 14:51:48,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 752 transitions, 14226 flow [2024-06-04 14:51:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:51:48,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-04 14:51:48,884 INFO L175 Difference]: Start difference. First operand has 454 places, 728 transitions, 12400 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:51:48,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 752 transitions, 14226 flow [2024-06-04 14:51:53,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 752 transitions, 13774 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 14:51:53,158 INFO L231 Difference]: Finished difference. Result has 451 places, 734 transitions, 12221 flow [2024-06-04 14:51:53,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12221, PETRI_PLACES=451, PETRI_TRANSITIONS=734} [2024-06-04 14:51:53,159 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-04 14:51:53,159 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 734 transitions, 12221 flow [2024-06-04 14:51:53,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:51:53,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:53,159 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 14:51:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:51:53,160 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 14:51:53,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1830243443, now seen corresponding path program 4 times [2024-06-04 14:51:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211691102] [2024-06-04 14:51:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:54,005 INFO 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 14:51:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211691102] [2024-06-04 14:51:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211691102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:54,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:54,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:54,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588171457] [2024-06-04 14:51:54,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:54,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:54,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:51:54,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 734 transitions, 12221 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:51:54,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:54,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:51:54,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:56,919 INFO L124 PetriNetUnfolderBase]: 5715/8764 cut-off events. [2024-06-04 14:51:56,919 INFO L125 PetriNetUnfolderBase]: For 1985300/1985341 co-relation queries the response was YES. [2024-06-04 14:51:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97701 conditions, 8764 events. 5715/8764 cut-off events. For 1985300/1985341 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51996 event pairs, 1476 based on Foata normal form. 13/8702 useless extension candidates. Maximal degree in co-relation 97495. Up to 8286 conditions per place. [2024-06-04 14:51:57,218 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 656 selfloop transitions, 33 changer transitions 0/751 dead transitions. [2024-06-04 14:51:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 751 transitions, 13735 flow [2024-06-04 14:51:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 14:51:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987012987012986 [2024-06-04 14:51:57,220 INFO L175 Difference]: Start difference. First operand has 451 places, 734 transitions, 12221 flow. Second operand 7 states and 117 transitions. [2024-06-04 14:51:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 751 transitions, 13735 flow [2024-06-04 14:52:01,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 751 transitions, 13578 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:01,560 INFO L231 Difference]: Finished difference. Result has 454 places, 737 transitions, 12234 flow [2024-06-04 14:52:01,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12090, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12234, PETRI_PLACES=454, PETRI_TRANSITIONS=737} [2024-06-04 14:52:01,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-04 14:52:01,561 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 737 transitions, 12234 flow [2024-06-04 14:52:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 14:52:01,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:01,561 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 14:52:01,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:52:01,562 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:01,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1816796782, now seen corresponding path program 20 times [2024-06-04 14:52:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106768695] [2024-06-04 14:52:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:02,964 INFO 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 14:52:02,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106768695] [2024-06-04 14:52:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106768695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:02,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:52:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51010468] [2024-06-04 14:52:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:02,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:52:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:52:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:52:03,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:03,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 737 transitions, 12234 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:03,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:03,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:03,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:06,186 INFO L124 PetriNetUnfolderBase]: 5460/8566 cut-off events. [2024-06-04 14:52:06,186 INFO L125 PetriNetUnfolderBase]: For 2022782/2022799 co-relation queries the response was YES. [2024-06-04 14:52:06,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98373 conditions, 8566 events. 5460/8566 cut-off events. For 2022782/2022799 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52465 event pairs, 856 based on Foata normal form. 20/8579 useless extension candidates. Maximal degree in co-relation 98166. Up to 6758 conditions per place. [2024-06-04 14:52:06,357 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 503 selfloop transitions, 232 changer transitions 0/776 dead transitions. [2024-06-04 14:52:06,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 776 transitions, 14010 flow [2024-06-04 14:52:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:52:06,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-04 14:52:06,359 INFO L175 Difference]: Start difference. First operand has 454 places, 737 transitions, 12234 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:52:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 776 transitions, 14010 flow [2024-06-04 14:52:11,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 776 transitions, 13902 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:11,453 INFO L231 Difference]: Finished difference. Result has 458 places, 739 transitions, 12762 flow [2024-06-04 14:52:11,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12126, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12762, PETRI_PLACES=458, PETRI_TRANSITIONS=739} [2024-06-04 14:52:11,454 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 413 predicate places. [2024-06-04 14:52:11,454 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 739 transitions, 12762 flow [2024-06-04 14:52:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:11,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:11,455 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 14:52:11,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 14:52:11,455 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:11,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:11,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1816619152, now seen corresponding path program 21 times [2024-06-04 14:52:11,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:11,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865028243] [2024-06-04 14:52:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:12,746 INFO 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 14:52:12,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:12,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865028243] [2024-06-04 14:52:12,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865028243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:12,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:12,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:52:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824233122] [2024-06-04 14:52:12,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:12,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:52:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:12,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:52:12,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:52:12,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:12,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 739 transitions, 12762 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:12,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:15,942 INFO L124 PetriNetUnfolderBase]: 5653/8885 cut-off events. [2024-06-04 14:52:15,942 INFO L125 PetriNetUnfolderBase]: For 2214936/2214948 co-relation queries the response was YES. [2024-06-04 14:52:16,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106812 conditions, 8885 events. 5653/8885 cut-off events. For 2214936/2214948 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 54743 event pairs, 885 based on Foata normal form. 16/8901 useless extension candidates. Maximal degree in co-relation 106605. Up to 6587 conditions per place. [2024-06-04 14:52:16,105 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 502 selfloop transitions, 243 changer transitions 0/786 dead transitions. [2024-06-04 14:52:16,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 786 transitions, 15144 flow [2024-06-04 14:52:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:52:16,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-04 14:52:16,106 INFO L175 Difference]: Start difference. First operand has 458 places, 739 transitions, 12762 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:52:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 786 transitions, 15144 flow [2024-06-04 14:52:22,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 786 transitions, 14520 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:22,389 INFO L231 Difference]: Finished difference. Result has 460 places, 743 transitions, 12963 flow [2024-06-04 14:52:22,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12150, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12963, PETRI_PLACES=460, PETRI_TRANSITIONS=743} [2024-06-04 14:52:22,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 415 predicate places. [2024-06-04 14:52:22,390 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 743 transitions, 12963 flow [2024-06-04 14:52:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:22,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:22,390 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 14:52:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 14:52:22,390 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:22,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1645921372, now seen corresponding path program 22 times [2024-06-04 14:52:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423080585] [2024-06-04 14:52:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:23,899 INFO 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 14:52:23,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423080585] [2024-06-04 14:52:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423080585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:23,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:23,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:52:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731004983] [2024-06-04 14:52:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:52:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:52:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:52:24,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:24,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 743 transitions, 12963 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:24,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:24,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:24,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:27,188 INFO L124 PetriNetUnfolderBase]: 5666/8914 cut-off events. [2024-06-04 14:52:27,188 INFO L125 PetriNetUnfolderBase]: For 2215170/2215182 co-relation queries the response was YES. [2024-06-04 14:52:27,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106341 conditions, 8914 events. 5666/8914 cut-off events. For 2215170/2215182 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 55103 event pairs, 940 based on Foata normal form. 20/8934 useless extension candidates. Maximal degree in co-relation 106133. Up to 7074 conditions per place. [2024-06-04 14:52:27,352 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 518 selfloop transitions, 223 changer transitions 0/782 dead transitions. [2024-06-04 14:52:27,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 782 transitions, 14755 flow [2024-06-04 14:52:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:52:27,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-04 14:52:27,353 INFO L175 Difference]: Start difference. First operand has 460 places, 743 transitions, 12963 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:52:27,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 782 transitions, 14755 flow [2024-06-04 14:52:32,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 782 transitions, 14258 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:32,241 INFO L231 Difference]: Finished difference. Result has 463 places, 745 transitions, 13088 flow [2024-06-04 14:52:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12468, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13088, PETRI_PLACES=463, PETRI_TRANSITIONS=745} [2024-06-04 14:52:32,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-04 14:52:32,257 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 745 transitions, 13088 flow [2024-06-04 14:52:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:32,257 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 14:52:32,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 14:52:32,257 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:32,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash 252490910, now seen corresponding path program 23 times [2024-06-04 14:52:32,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:32,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525543389] [2024-06-04 14:52:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:33,775 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 14:52:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:33,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525543389] [2024-06-04 14:52:33,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525543389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:33,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:33,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:52:33,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917946966] [2024-06-04 14:52:33,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:33,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:52:33,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:33,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:52:33,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:52:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:33,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 745 transitions, 13088 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:33,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:33,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:33,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:37,166 INFO L124 PetriNetUnfolderBase]: 5610/8825 cut-off events. [2024-06-04 14:52:37,166 INFO L125 PetriNetUnfolderBase]: For 2193816/2193833 co-relation queries the response was YES. [2024-06-04 14:52:37,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102793 conditions, 8825 events. 5610/8825 cut-off events. For 2193816/2193833 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54515 event pairs, 866 based on Foata normal form. 40/8858 useless extension candidates. Maximal degree in co-relation 102584. Up to 6758 conditions per place. [2024-06-04 14:52:37,340 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 500 selfloop transitions, 245 changer transitions 0/786 dead transitions. [2024-06-04 14:52:37,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 786 transitions, 14768 flow [2024-06-04 14:52:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 14:52:37,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-04 14:52:37,342 INFO L175 Difference]: Start difference. First operand has 463 places, 745 transitions, 13088 flow. Second operand 10 states and 191 transitions. [2024-06-04 14:52:37,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 786 transitions, 14768 flow [2024-06-04 14:52:41,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 786 transitions, 14086 flow, removed 122 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:41,824 INFO L231 Difference]: Finished difference. Result has 465 places, 745 transitions, 12912 flow [2024-06-04 14:52:41,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12406, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12912, PETRI_PLACES=465, PETRI_TRANSITIONS=745} [2024-06-04 14:52:41,825 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-04 14:52:41,825 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 745 transitions, 12912 flow [2024-06-04 14:52:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:41,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:41,825 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 14:52:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 14:52:41,825 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:41,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 75354740, now seen corresponding path program 24 times [2024-06-04 14:52:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:41,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589055167] [2024-06-04 14:52:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:41,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat