./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_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/mix038_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix038_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix038_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:27:07,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:27:07,286 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:27:07,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:27:07,290 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:27:07,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:27:07,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:27:07,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:27:07,320 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:27:07,320 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:27:07,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:27:07,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:27:07,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:27:07,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:27:07,322 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:27:07,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:27:07,322 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:27:07,322 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:27:07,323 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:27:07,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:27:07,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:27:07,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:27:07,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:27:07,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:27:07,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:27:07,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:27:07,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:27:07,325 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:27:07,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:27:07,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:27:07,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:27:07,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:27:07,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:27:07,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:27:07,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:27:07,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:27:07,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:27:07,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:27:07,328 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:27:07,328 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:27:07,328 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:27:07,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:27:07,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:27:07,333 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:27:07,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:27:07,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:27:07,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:27:07,553 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:27:07,554 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:27:07,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038_tso.oepc.yml/witness.yml [2024-06-14 12:27:07,712 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:27:07,712 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:27:07,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_tso.oepc.i [2024-06-14 12:27:08,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:27:08,972 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:27:08,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_tso.oepc.i [2024-06-14 12:27:08,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3405ae1/29d8135b0d2a4a83909a600fa88b013b/FLAG69c3e2714 [2024-06-14 12:27:09,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3405ae1/29d8135b0d2a4a83909a600fa88b013b [2024-06-14 12:27:09,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:27:09,003 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:27:09,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:27:09,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:27:09,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:27:09,008 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:27:07" (1/2) ... [2024-06-14 12:27:09,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7787a73c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:27:09, skipping insertion in model container [2024-06-14 12:27:09,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:27:07" (1/2) ... [2024-06-14 12:27:09,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f489510 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:27:09, skipping insertion in model container [2024-06-14 12:27:09,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:27:09" (2/2) ... [2024-06-14 12:27:09,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7787a73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09, skipping insertion in model container [2024-06-14 12:27:09,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:27:09" (2/2) ... [2024-06-14 12:27:09,010 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:27:09,068 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:27:09,069 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x$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 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) [2024-06-14 12:27:09,069 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 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))) [2024-06-14 12:27:09,070 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x$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 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) [2024-06-14 12:27:09,070 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:27:09,070 INFO L106 edCorrectnessWitness]: ghost_update [L831-L831] multithreaded = 1; [2024-06-14 12:27:09,092 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:27:09,437 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:27:09,449 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:27:09,561 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:27:09,598 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:27:09,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09 WrapperNode [2024-06-14 12:27:09,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:27:09,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:27:09,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:27:09,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:27:09,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,651 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-14 12:27:09,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:27:09,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:27:09,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:27:09,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:27:09,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,665 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,678 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:27:09,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,685 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,688 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:27:09,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:27:09,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:27:09,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:27:09,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (1/1) ... [2024-06-14 12:27:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:27:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:27:09,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:27:09,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:27:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:27:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:27:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:27:09,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:27:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:27:09,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:27:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:27:09,744 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:27:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:27:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:27:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:27:09,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:27:09,746 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:27:09,844 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:27:09,845 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:27:10,186 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:27:10,188 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:27:10,321 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:27:10,321 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:27:10,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:27:10 BoogieIcfgContainer [2024-06-14 12:27:10,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:27:10,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:27:10,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:27:10,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:27:10,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:27:07" (1/4) ... [2024-06-14 12:27:10,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559034 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:27:10, skipping insertion in model container [2024-06-14 12:27:10,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:27:09" (2/4) ... [2024-06-14 12:27:10,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:27:10, skipping insertion in model container [2024-06-14 12:27:10,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:09" (3/4) ... [2024-06-14 12:27:10,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:27:10, skipping insertion in model container [2024-06-14 12:27:10,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:27:10" (4/4) ... [2024-06-14 12:27:10,329 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_tso.oepc.i [2024-06-14 12:27:10,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:27:10,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:27:10,342 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:27:10,393 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:27:10,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:27:10,448 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:27:10,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:27:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:27:10,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:27:10,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:27:10,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:27:10,471 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;@69a22b60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:27:10,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:27:10,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:27:10,477 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:27:10,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:27:10,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:10,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:27:10,478 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)] === [2024-06-14 12:27:10,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1115339954, now seen corresponding path program 1 times [2024-06-14 12:27:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53987775] [2024-06-14 12:27:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:10,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53987775] [2024-06-14 12:27:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53987775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:27:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81281872] [2024-06-14 12:27:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:27:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:27:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:27:11,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:11,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:11,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:11,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:11,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:11,963 INFO L124 PetriNetUnfolderBase]: 1363/2171 cut-off events. [2024-06-14 12:27:11,963 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 12:27:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4297 conditions, 2171 events. 1363/2171 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10812 event pairs, 964 based on Foata normal form. 1/2090 useless extension candidates. Maximal degree in co-relation 4282. Up to 2037 conditions per place. [2024-06-14 12:27:11,977 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:27:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 179 flow [2024-06-14 12:27:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:27:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:27:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-14 12:27:11,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 12:27:11,988 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 74 transitions. [2024-06-14 12:27:11,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 179 flow [2024-06-14 12:27:11,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:11,994 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:11,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:27:11,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:27:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:11,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:11,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:11,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:27:11,999 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)] === [2024-06-14 12:27:12,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1900162157, now seen corresponding path program 1 times [2024-06-14 12:27:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923789995] [2024-06-14 12:27:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:12,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923789995] [2024-06-14 12:27:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923789995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:12,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:27:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556079201] [2024-06-14 12:27:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:27:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:27:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:27:12,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:12,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:12,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:12,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:12,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:12,922 INFO L124 PetriNetUnfolderBase]: 1564/2416 cut-off events. [2024-06-14 12:27:12,922 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-14 12:27:12,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 2416 events. 1564/2416 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11779 event pairs, 981 based on Foata normal form. 3/2382 useless extension candidates. Maximal degree in co-relation 5430. Up to 2310 conditions per place. [2024-06-14 12:27:12,931 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:27:12,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2024-06-14 12:27:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:27:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:27:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 12:27:12,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 12:27:12,933 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-14 12:27:12,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2024-06-14 12:27:12,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:27:12,935 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:12,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:27:12,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:27:12,936 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:12,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:12,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:12,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:12,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:27:12,937 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)] === [2024-06-14 12:27:12,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1224514155, now seen corresponding path program 1 times [2024-06-14 12:27:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:12,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680701362] [2024-06-14 12:27:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:12,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680701362] [2024-06-14 12:27:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680701362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:13,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:13,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:27:13,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030524554] [2024-06-14 12:27:13,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:13,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:27:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:13,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:27:13,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:27:13,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:13,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:13,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:13,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:13,850 INFO L124 PetriNetUnfolderBase]: 1552/2400 cut-off events. [2024-06-14 12:27:13,850 INFO L125 PetriNetUnfolderBase]: For 1262/1262 co-relation queries the response was YES. [2024-06-14 12:27:13,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5997 conditions, 2400 events. 1552/2400 cut-off events. For 1262/1262 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11685 event pairs, 697 based on Foata normal form. 6/2369 useless extension candidates. Maximal degree in co-relation 5980. Up to 2262 conditions per place. [2024-06-14 12:27:13,860 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-14 12:27:13,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 330 flow [2024-06-14 12:27:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 12:27:13,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255813953488372 [2024-06-14 12:27:13,862 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 113 transitions. [2024-06-14 12:27:13,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 330 flow [2024-06-14 12:27:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:13,864 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-14 12:27:13,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 12:27:13,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 12:27:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-14 12:27:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:13,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:27:13,866 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)] === [2024-06-14 12:27:13,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 62973076, now seen corresponding path program 1 times [2024-06-14 12:27:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262336829] [2024-06-14 12:27:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:14,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262336829] [2024-06-14 12:27:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262336829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269898727] [2024-06-14 12:27:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:14,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:14,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:14,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:14,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:15,251 INFO L124 PetriNetUnfolderBase]: 1543/2383 cut-off events. [2024-06-14 12:27:15,251 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-06-14 12:27:15,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6527 conditions, 2383 events. 1543/2383 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11595 event pairs, 534 based on Foata normal form. 6/2352 useless extension candidates. Maximal degree in co-relation 6509. Up to 2217 conditions per place. [2024-06-14 12:27:15,261 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-14 12:27:15,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 384 flow [2024-06-14 12:27:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 12:27:15,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:27:15,263 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 129 transitions. [2024-06-14 12:27:15,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 384 flow [2024-06-14 12:27:15,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:15,265 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 195 flow [2024-06-14 12:27:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 12:27:15,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:27:15,266 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 195 flow [2024-06-14 12:27:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:15,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:15,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:27:15,267 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)] === [2024-06-14 12:27:15,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -548304503, now seen corresponding path program 1 times [2024-06-14 12:27:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701869958] [2024-06-14 12:27:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701869958] [2024-06-14 12:27:15,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701869958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:15,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:15,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:15,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539543650] [2024-06-14 12:27:15,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:15,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:15,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:16,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:16,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-14 12:27:16,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:16,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:16,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:16,346 INFO L124 PetriNetUnfolderBase]: 1331/2161 cut-off events. [2024-06-14 12:27:16,346 INFO L125 PetriNetUnfolderBase]: For 3386/3386 co-relation queries the response was YES. [2024-06-14 12:27:16,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6167 conditions, 2161 events. 1331/2161 cut-off events. For 3386/3386 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11014 event pairs, 867 based on Foata normal form. 2/2134 useless extension candidates. Maximal degree in co-relation 6148. Up to 1979 conditions per place. [2024-06-14 12:27:16,358 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 43 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-14 12:27:16,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 353 flow [2024-06-14 12:27:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:27:16,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:27:16,360 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 195 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:27:16,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 353 flow [2024-06-14 12:27:16,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 318 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:16,367 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 225 flow [2024-06-14 12:27:16,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-14 12:27:16,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 12:27:16,370 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 225 flow [2024-06-14 12:27:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-14 12:27:16,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:16,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:16,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:27:16,374 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)] === [2024-06-14 12:27:16,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1553107524, now seen corresponding path program 1 times [2024-06-14 12:27:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:16,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461519345] [2024-06-14 12:27:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:16,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:17,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461519345] [2024-06-14 12:27:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461519345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:17,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:17,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58020086] [2024-06-14 12:27:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:17,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:17,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:17,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:17,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:17,517 INFO L124 PetriNetUnfolderBase]: 1561/2425 cut-off events. [2024-06-14 12:27:17,517 INFO L125 PetriNetUnfolderBase]: For 5255/5255 co-relation queries the response was YES. [2024-06-14 12:27:17,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7544 conditions, 2425 events. 1561/2425 cut-off events. For 5255/5255 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12001 event pairs, 942 based on Foata normal form. 2/2407 useless extension candidates. Maximal degree in co-relation 7522. Up to 2290 conditions per place. [2024-06-14 12:27:17,529 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 55 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-14 12:27:17,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 463 flow [2024-06-14 12:27:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:27:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:27:17,530 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 225 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:27:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 463 flow [2024-06-14 12:27:17,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 439 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:17,534 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 300 flow [2024-06-14 12:27:17,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-14 12:27:17,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 12:27:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 300 flow [2024-06-14 12:27:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:17,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:17,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:27:17,535 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)] === [2024-06-14 12:27:17,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -490261862, now seen corresponding path program 2 times [2024-06-14 12:27:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:17,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639237764] [2024-06-14 12:27:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639237764] [2024-06-14 12:27:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639237764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686121466] [2024-06-14 12:27:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:18,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:18,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:18,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:18,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:18,747 INFO L124 PetriNetUnfolderBase]: 1572/2436 cut-off events. [2024-06-14 12:27:18,747 INFO L125 PetriNetUnfolderBase]: For 7313/7313 co-relation queries the response was YES. [2024-06-14 12:27:18,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8250 conditions, 2436 events. 1572/2436 cut-off events. For 7313/7313 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12055 event pairs, 951 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 8226. Up to 2297 conditions per place. [2024-06-14 12:27:18,766 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-14 12:27:18,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 516 flow [2024-06-14 12:27:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:27:18,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:27:18,768 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 300 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:27:18,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 516 flow [2024-06-14 12:27:18,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 474 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:18,773 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 338 flow [2024-06-14 12:27:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 12:27:18,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:27:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 338 flow [2024-06-14 12:27:18,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:18,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:27:18,775 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)] === [2024-06-14 12:27:18,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 523638406, now seen corresponding path program 3 times [2024-06-14 12:27:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117896225] [2024-06-14 12:27:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:19,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:19,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117896225] [2024-06-14 12:27:19,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117896225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:19,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:19,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501159595] [2024-06-14 12:27:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:19,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:19,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:19,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:19,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:19,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:19,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:20,139 INFO L124 PetriNetUnfolderBase]: 1567/2423 cut-off events. [2024-06-14 12:27:20,140 INFO L125 PetriNetUnfolderBase]: For 9618/9618 co-relation queries the response was YES. [2024-06-14 12:27:20,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8774 conditions, 2423 events. 1567/2423 cut-off events. For 9618/9618 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11882 event pairs, 947 based on Foata normal form. 2/2406 useless extension candidates. Maximal degree in co-relation 8749. Up to 2272 conditions per place. [2024-06-14 12:27:20,149 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 22 changer transitions 0/77 dead transitions. [2024-06-14 12:27:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 556 flow [2024-06-14 12:27:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:27:20,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:27:20,153 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 338 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:27:20,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 556 flow [2024-06-14 12:27:20,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 498 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:20,159 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 370 flow [2024-06-14 12:27:20,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-14 12:27:20,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-14 12:27:20,160 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 370 flow [2024-06-14 12:27:20,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:20,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:20,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:20,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:27:20,161 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)] === [2024-06-14 12:27:20,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 529210532, now seen corresponding path program 1 times [2024-06-14 12:27:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:20,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113584460] [2024-06-14 12:27:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113584460] [2024-06-14 12:27:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113584460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68750540] [2024-06-14 12:27:21,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:21,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:21,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:21,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 370 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) [2024-06-14 12:27:21,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:21,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:21,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:21,522 INFO L124 PetriNetUnfolderBase]: 1663/2647 cut-off events. [2024-06-14 12:27:21,522 INFO L125 PetriNetUnfolderBase]: For 9450/9450 co-relation queries the response was YES. [2024-06-14 12:27:21,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9259 conditions, 2647 events. 1663/2647 cut-off events. For 9450/9450 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13220 event pairs, 1025 based on Foata normal form. 2/2623 useless extension candidates. Maximal degree in co-relation 9233. Up to 2443 conditions per place. [2024-06-14 12:27:21,533 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-06-14 12:27:21,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 627 flow [2024-06-14 12:27:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:27:21,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:27:21,535 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 370 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:27:21,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 627 flow [2024-06-14 12:27:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 87 transitions, 564 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:21,541 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 396 flow [2024-06-14 12:27:21,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 12:27:21,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-14 12:27:21,542 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 396 flow [2024-06-14 12:27:21,542 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) [2024-06-14 12:27:21,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:21,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:21,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:27:21,543 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)] === [2024-06-14 12:27:21,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash -490255900, now seen corresponding path program 1 times [2024-06-14 12:27:21,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:21,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614396116] [2024-06-14 12:27:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:21,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:22,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:22,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614396116] [2024-06-14 12:27:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614396116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:22,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:22,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619728433] [2024-06-14 12:27:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:22,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:22,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:22,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 396 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) [2024-06-14 12:27:22,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:22,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:22,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:22,794 INFO L124 PetriNetUnfolderBase]: 1839/2862 cut-off events. [2024-06-14 12:27:22,794 INFO L125 PetriNetUnfolderBase]: For 13295/13303 co-relation queries the response was YES. [2024-06-14 12:27:22,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10909 conditions, 2862 events. 1839/2862 cut-off events. For 13295/13303 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14357 event pairs, 714 based on Foata normal form. 12/2859 useless extension candidates. Maximal degree in co-relation 10881. Up to 2635 conditions per place. [2024-06-14 12:27:22,808 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 76 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-14 12:27:22,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 746 flow [2024-06-14 12:27:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:27:22,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:27:22,810 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 396 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:27:22,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 746 flow [2024-06-14 12:27:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 704 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:22,816 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 500 flow [2024-06-14 12:27:22,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=500, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-14 12:27:22,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 12:27:22,816 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 500 flow [2024-06-14 12:27:22,817 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) [2024-06-14 12:27:22,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:22,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:22,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:27:22,817 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)] === [2024-06-14 12:27:22,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 873868120, now seen corresponding path program 2 times [2024-06-14 12:27:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724725426] [2024-06-14 12:27:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:23,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724725426] [2024-06-14 12:27:23,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724725426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:23,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:23,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:23,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119543981] [2024-06-14 12:27:23,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:23,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:23,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:23,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 500 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) [2024-06-14 12:27:23,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:23,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:24,150 INFO L124 PetriNetUnfolderBase]: 1940/3020 cut-off events. [2024-06-14 12:27:24,151 INFO L125 PetriNetUnfolderBase]: For 18133/18163 co-relation queries the response was YES. [2024-06-14 12:27:24,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12762 conditions, 3020 events. 1940/3020 cut-off events. For 18133/18163 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15178 event pairs, 660 based on Foata normal form. 19/3021 useless extension candidates. Maximal degree in co-relation 12731. Up to 2749 conditions per place. [2024-06-14 12:27:24,168 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 78 selfloop transitions, 39 changer transitions 0/123 dead transitions. [2024-06-14 12:27:24,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 123 transitions, 974 flow [2024-06-14 12:27:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:27:24,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:27:24,170 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 500 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:27:24,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 123 transitions, 974 flow [2024-06-14 12:27:24,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 123 transitions, 886 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:24,179 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 702 flow [2024-06-14 12:27:24,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-06-14 12:27:24,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 12:27:24,180 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 702 flow [2024-06-14 12:27:24,180 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) [2024-06-14 12:27:24,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:24,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:27:24,181 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)] === [2024-06-14 12:27:24,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -204348842, now seen corresponding path program 3 times [2024-06-14 12:27:24,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006890745] [2024-06-14 12:27:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:25,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:25,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006890745] [2024-06-14 12:27:25,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006890745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:25,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:25,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749462382] [2024-06-14 12:27:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:25,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:25,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:25,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 702 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) [2024-06-14 12:27:25,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:25,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:25,604 INFO L124 PetriNetUnfolderBase]: 2031/3154 cut-off events. [2024-06-14 12:27:25,604 INFO L125 PetriNetUnfolderBase]: For 22798/22822 co-relation queries the response was YES. [2024-06-14 12:27:25,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 3154 events. 2031/3154 cut-off events. For 22798/22822 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15890 event pairs, 605 based on Foata normal form. 32/3168 useless extension candidates. Maximal degree in co-relation 14213. Up to 2728 conditions per place. [2024-06-14 12:27:25,619 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 83 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-14 12:27:25,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 135 transitions, 1204 flow [2024-06-14 12:27:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:27:25,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:27:25,620 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 702 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:27:25,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 135 transitions, 1204 flow [2024-06-14 12:27:25,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 1134 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:25,632 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 858 flow [2024-06-14 12:27:25,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-14 12:27:25,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 12:27:25,633 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 858 flow [2024-06-14 12:27:25,633 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) [2024-06-14 12:27:25,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:25,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:25,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:27:25,634 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)] === [2024-06-14 12:27:25,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -951839466, now seen corresponding path program 4 times [2024-06-14 12:27:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:25,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856835507] [2024-06-14 12:27:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:26,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:26,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856835507] [2024-06-14 12:27:26,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856835507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:26,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:26,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:26,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877976231] [2024-06-14 12:27:26,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:26,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:26,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:26,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:26,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 858 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) [2024-06-14 12:27:26,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:26,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:26,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:27,038 INFO L124 PetriNetUnfolderBase]: 2076/3235 cut-off events. [2024-06-14 12:27:27,039 INFO L125 PetriNetUnfolderBase]: For 29580/29618 co-relation queries the response was YES. [2024-06-14 12:27:27,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15841 conditions, 3235 events. 2076/3235 cut-off events. For 29580/29618 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16467 event pairs, 635 based on Foata normal form. 22/3241 useless extension candidates. Maximal degree in co-relation 15805. Up to 2911 conditions per place. [2024-06-14 12:27:27,058 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 42 changer transitions 0/132 dead transitions. [2024-06-14 12:27:27,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 132 transitions, 1238 flow [2024-06-14 12:27:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:27:27,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:27:27,059 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 858 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:27:27,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 132 transitions, 1238 flow [2024-06-14 12:27:27,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 1161 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:27,079 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 939 flow [2024-06-14 12:27:27,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=939, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2024-06-14 12:27:27,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 12:27:27,080 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 939 flow [2024-06-14 12:27:27,080 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) [2024-06-14 12:27:27,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:27,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:27,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:27:27,081 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)] === [2024-06-14 12:27:27,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1981752194, now seen corresponding path program 5 times [2024-06-14 12:27:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852118097] [2024-06-14 12:27:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852118097] [2024-06-14 12:27:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852118097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010452323] [2024-06-14 12:27:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:27,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:27,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:27,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 939 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) [2024-06-14 12:27:27,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:27,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:28,513 INFO L124 PetriNetUnfolderBase]: 2189/3400 cut-off events. [2024-06-14 12:27:28,514 INFO L125 PetriNetUnfolderBase]: For 36152/36186 co-relation queries the response was YES. [2024-06-14 12:27:28,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17736 conditions, 3400 events. 2189/3400 cut-off events. For 36152/36186 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17248 event pairs, 608 based on Foata normal form. 42/3424 useless extension candidates. Maximal degree in co-relation 17698. Up to 2831 conditions per place. [2024-06-14 12:27:28,535 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 52 changer transitions 0/142 dead transitions. [2024-06-14 12:27:28,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 142 transitions, 1473 flow [2024-06-14 12:27:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:27:28,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 12:27:28,537 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 939 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:27:28,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 142 transitions, 1473 flow [2024-06-14 12:27:28,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1379 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:28,563 INFO L231 Difference]: Finished difference. Result has 93 places, 117 transitions, 1119 flow [2024-06-14 12:27:28,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1119, PETRI_PLACES=93, PETRI_TRANSITIONS=117} [2024-06-14 12:27:28,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 12:27:28,564 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 117 transitions, 1119 flow [2024-06-14 12:27:28,564 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) [2024-06-14 12:27:28,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:28,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:27:28,565 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)] === [2024-06-14 12:27:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -774587976, now seen corresponding path program 6 times [2024-06-14 12:27:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884067138] [2024-06-14 12:27:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:29,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884067138] [2024-06-14 12:27:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884067138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:29,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:29,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:29,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739101926] [2024-06-14 12:27:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:29,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:29,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 117 transitions, 1119 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) [2024-06-14 12:27:29,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:29,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:29,832 INFO L124 PetriNetUnfolderBase]: 2197/3399 cut-off events. [2024-06-14 12:27:29,833 INFO L125 PetriNetUnfolderBase]: For 44365/44409 co-relation queries the response was YES. [2024-06-14 12:27:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18991 conditions, 3399 events. 2197/3399 cut-off events. For 44365/44409 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17243 event pairs, 570 based on Foata normal form. 31/3408 useless extension candidates. Maximal degree in co-relation 18951. Up to 2702 conditions per place. [2024-06-14 12:27:29,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 61 changer transitions 0/151 dead transitions. [2024-06-14 12:27:29,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 151 transitions, 1749 flow [2024-06-14 12:27:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:27:29,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:27:29,855 INFO L175 Difference]: Start difference. First operand has 93 places, 117 transitions, 1119 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:27:29,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 151 transitions, 1749 flow [2024-06-14 12:27:29,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 151 transitions, 1638 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:29,889 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1300 flow [2024-06-14 12:27:29,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1300, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-14 12:27:29,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 12:27:29,891 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1300 flow [2024-06-14 12:27:29,891 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) [2024-06-14 12:27:29,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:29,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:27:29,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:29,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash -774341712, now seen corresponding path program 1 times [2024-06-14 12:27:29,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486561378] [2024-06-14 12:27:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486561378] [2024-06-14 12:27:31,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486561378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:31,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:31,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:31,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029420907] [2024-06-14 12:27:31,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:31,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:31,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:31,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:31,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1300 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:31,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:31,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:31,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:31,705 INFO L124 PetriNetUnfolderBase]: 2170/3365 cut-off events. [2024-06-14 12:27:31,706 INFO L125 PetriNetUnfolderBase]: For 38406/38406 co-relation queries the response was YES. [2024-06-14 12:27:31,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18357 conditions, 3365 events. 2170/3365 cut-off events. For 38406/38406 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16826 event pairs, 912 based on Foata normal form. 4/3344 useless extension candidates. Maximal degree in co-relation 18314. Up to 3165 conditions per place. [2024-06-14 12:27:31,729 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2024-06-14 12:27:31,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 150 transitions, 1704 flow [2024-06-14 12:27:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:27:31,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:27:31,741 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1300 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:27:31,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 150 transitions, 1704 flow [2024-06-14 12:27:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 150 transitions, 1540 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:31,777 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1217 flow [2024-06-14 12:27:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1217, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-14 12:27:31,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-14 12:27:31,778 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1217 flow [2024-06-14 12:27:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:31,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:31,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:27:31,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1187539917, now seen corresponding path program 1 times [2024-06-14 12:27:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:31,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546118961] [2024-06-14 12:27:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:32,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:32,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546118961] [2024-06-14 12:27:32,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546118961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:32,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346869647] [2024-06-14 12:27:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:32,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:32,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:32,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:32,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:32,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:32,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:32,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:33,073 INFO L124 PetriNetUnfolderBase]: 2167/3389 cut-off events. [2024-06-14 12:27:33,074 INFO L125 PetriNetUnfolderBase]: For 38446/38446 co-relation queries the response was YES. [2024-06-14 12:27:33,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17796 conditions, 3389 events. 2167/3389 cut-off events. For 38446/38446 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17075 event pairs, 936 based on Foata normal form. 1/3357 useless extension candidates. Maximal degree in co-relation 17752. Up to 3203 conditions per place. [2024-06-14 12:27:33,089 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 123 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2024-06-14 12:27:33,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 137 transitions, 1525 flow [2024-06-14 12:27:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:27:33,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 12:27:33,091 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1217 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:27:33,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 137 transitions, 1525 flow [2024-06-14 12:27:33,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 1464 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:33,120 INFO L231 Difference]: Finished difference. Result has 101 places, 130 transitions, 1208 flow [2024-06-14 12:27:33,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=101, PETRI_TRANSITIONS=130} [2024-06-14 12:27:33,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 12:27:33,121 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 130 transitions, 1208 flow [2024-06-14 12:27:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:33,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:33,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:33,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:27:33,122 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)] === [2024-06-14 12:27:33,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1477491077, now seen corresponding path program 1 times [2024-06-14 12:27:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:33,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774269327] [2024-06-14 12:27:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:34,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774269327] [2024-06-14 12:27:34,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774269327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:34,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443944774] [2024-06-14 12:27:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:34,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:34,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 130 transitions, 1208 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:34,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:34,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:34,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:34,783 INFO L124 PetriNetUnfolderBase]: 2186/3382 cut-off events. [2024-06-14 12:27:34,783 INFO L125 PetriNetUnfolderBase]: For 48645/48689 co-relation queries the response was YES. [2024-06-14 12:27:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19108 conditions, 3382 events. 2186/3382 cut-off events. For 48645/48689 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17215 event pairs, 777 based on Foata normal form. 21/3400 useless extension candidates. Maximal degree in co-relation 19063. Up to 3098 conditions per place. [2024-06-14 12:27:34,803 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2024-06-14 12:27:34,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 164 transitions, 1710 flow [2024-06-14 12:27:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:27:34,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:27:34,804 INFO L175 Difference]: Start difference. First operand has 101 places, 130 transitions, 1208 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:27:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 164 transitions, 1710 flow [2024-06-14 12:27:34,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1680 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:34,828 INFO L231 Difference]: Finished difference. Result has 107 places, 137 transitions, 1402 flow [2024-06-14 12:27:34,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=107, PETRI_TRANSITIONS=137} [2024-06-14 12:27:34,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 12:27:34,829 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 137 transitions, 1402 flow [2024-06-14 12:27:34,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:34,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:34,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:27:34,830 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)] === [2024-06-14 12:27:34,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2140118489, now seen corresponding path program 2 times [2024-06-14 12:27:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:34,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54279418] [2024-06-14 12:27:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:35,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:35,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54279418] [2024-06-14 12:27:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54279418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:35,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:35,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934336179] [2024-06-14 12:27:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:35,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:35,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:35,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 137 transitions, 1402 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:35,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:35,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:35,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:36,656 INFO L124 PetriNetUnfolderBase]: 2195/3415 cut-off events. [2024-06-14 12:27:36,657 INFO L125 PetriNetUnfolderBase]: For 52976/53024 co-relation queries the response was YES. [2024-06-14 12:27:36,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20006 conditions, 3415 events. 2195/3415 cut-off events. For 52976/53024 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17439 event pairs, 608 based on Foata normal form. 25/3439 useless extension candidates. Maximal degree in co-relation 19959. Up to 3104 conditions per place. [2024-06-14 12:27:36,675 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 116 selfloop transitions, 49 changer transitions 0/171 dead transitions. [2024-06-14 12:27:36,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 171 transitions, 1992 flow [2024-06-14 12:27:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:27:36,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:27:36,677 INFO L175 Difference]: Start difference. First operand has 107 places, 137 transitions, 1402 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:27:36,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 171 transitions, 1992 flow [2024-06-14 12:27:36,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 171 transitions, 1853 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:36,710 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1563 flow [2024-06-14 12:27:36,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2024-06-14 12:27:36,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:27:36,711 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1563 flow [2024-06-14 12:27:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:36,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:36,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:27:36,712 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)] === [2024-06-14 12:27:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1208671191, now seen corresponding path program 1 times [2024-06-14 12:27:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:36,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862638156] [2024-06-14 12:27:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862638156] [2024-06-14 12:27:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862638156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:37,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721532804] [2024-06-14 12:27:37,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:37,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:37,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:37,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:37,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1563 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:38,350 INFO L124 PetriNetUnfolderBase]: 2443/3712 cut-off events. [2024-06-14 12:27:38,351 INFO L125 PetriNetUnfolderBase]: For 57516/57520 co-relation queries the response was YES. [2024-06-14 12:27:38,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21230 conditions, 3712 events. 2443/3712 cut-off events. For 57516/57520 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17984 event pairs, 621 based on Foata normal form. 10/3721 useless extension candidates. Maximal degree in co-relation 21183. Up to 3220 conditions per place. [2024-06-14 12:27:38,375 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 113 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-14 12:27:38,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 196 transitions, 2353 flow [2024-06-14 12:27:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:27:38,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:27:38,377 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1563 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:27:38,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 196 transitions, 2353 flow [2024-06-14 12:27:38,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 196 transitions, 2226 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:38,434 INFO L231 Difference]: Finished difference. Result has 115 places, 164 transitions, 1909 flow [2024-06-14 12:27:38,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=115, PETRI_TRANSITIONS=164} [2024-06-14 12:27:38,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:27:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 164 transitions, 1909 flow [2024-06-14 12:27:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:38,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:27:38,436 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)] === [2024-06-14 12:27:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash 557658179, now seen corresponding path program 3 times [2024-06-14 12:27:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451798945] [2024-06-14 12:27:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451798945] [2024-06-14 12:27:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451798945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:39,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:39,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:39,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422022021] [2024-06-14 12:27:39,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:39,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:39,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:39,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 164 transitions, 1909 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:39,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:39,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:39,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:40,179 INFO L124 PetriNetUnfolderBase]: 2196/3405 cut-off events. [2024-06-14 12:27:40,179 INFO L125 PetriNetUnfolderBase]: For 65705/65753 co-relation queries the response was YES. [2024-06-14 12:27:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20787 conditions, 3405 events. 2196/3405 cut-off events. For 65705/65753 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 17324 event pairs, 733 based on Foata normal form. 21/3423 useless extension candidates. Maximal degree in co-relation 20738. Up to 3047 conditions per place. [2024-06-14 12:27:40,201 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-14 12:27:40,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 190 transitions, 2429 flow [2024-06-14 12:27:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:27:40,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:27:40,202 INFO L175 Difference]: Start difference. First operand has 115 places, 164 transitions, 1909 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:27:40,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 190 transitions, 2429 flow [2024-06-14 12:27:40,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 190 transitions, 2317 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:40,251 INFO L231 Difference]: Finished difference. Result has 117 places, 167 transitions, 2053 flow [2024-06-14 12:27:40,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2053, PETRI_PLACES=117, PETRI_TRANSITIONS=167} [2024-06-14 12:27:40,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 12:27:40,252 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 167 transitions, 2053 flow [2024-06-14 12:27:40,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:40,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:40,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:40,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:27:40,253 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)] === [2024-06-14 12:27:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1304782585, now seen corresponding path program 2 times [2024-06-14 12:27:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:40,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677168251] [2024-06-14 12:27:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677168251] [2024-06-14 12:27:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677168251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188743134] [2024-06-14 12:27:41,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:41,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 167 transitions, 2053 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:41,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:41,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:41,897 INFO L124 PetriNetUnfolderBase]: 2422/3651 cut-off events. [2024-06-14 12:27:41,898 INFO L125 PetriNetUnfolderBase]: For 68663/68667 co-relation queries the response was YES. [2024-06-14 12:27:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22224 conditions, 3651 events. 2422/3651 cut-off events. For 68663/68667 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17698 event pairs, 949 based on Foata normal form. 6/3656 useless extension candidates. Maximal degree in co-relation 22173. Up to 3496 conditions per place. [2024-06-14 12:27:41,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 166 selfloop transitions, 30 changer transitions 0/200 dead transitions. [2024-06-14 12:27:41,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 200 transitions, 2640 flow [2024-06-14 12:27:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:27:41,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:27:41,923 INFO L175 Difference]: Start difference. First operand has 117 places, 167 transitions, 2053 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:27:41,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 200 transitions, 2640 flow [2024-06-14 12:27:41,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 2508 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:41,989 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 2116 flow [2024-06-14 12:27:41,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2116, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2024-06-14 12:27:41,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 12:27:41,990 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 2116 flow [2024-06-14 12:27:41,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:41,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:41,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:41,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:27:41,990 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)] === [2024-06-14 12:27:41,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:41,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1448673115, now seen corresponding path program 3 times [2024-06-14 12:27:41,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:41,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797253589] [2024-06-14 12:27:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:41,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:43,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797253589] [2024-06-14 12:27:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797253589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:43,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:43,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117367468] [2024-06-14 12:27:43,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:43,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:43,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:43,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:43,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:43,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:43,768 INFO L124 PetriNetUnfolderBase]: 2444/3702 cut-off events. [2024-06-14 12:27:43,769 INFO L125 PetriNetUnfolderBase]: For 62753/62761 co-relation queries the response was YES. [2024-06-14 12:27:43,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21995 conditions, 3702 events. 2444/3702 cut-off events. For 62753/62761 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 17939 event pairs, 861 based on Foata normal form. 10/3710 useless extension candidates. Maximal degree in co-relation 21942. Up to 3492 conditions per place. [2024-06-14 12:27:43,793 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 166 selfloop transitions, 35 changer transitions 0/205 dead transitions. [2024-06-14 12:27:43,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 205 transitions, 2677 flow [2024-06-14 12:27:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:27:43,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:27:43,794 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 2116 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:27:43,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 205 transitions, 2677 flow [2024-06-14 12:27:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 205 transitions, 2595 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:43,846 INFO L231 Difference]: Finished difference. Result has 125 places, 183 transitions, 2199 flow [2024-06-14 12:27:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2199, PETRI_PLACES=125, PETRI_TRANSITIONS=183} [2024-06-14 12:27:43,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:27:43,847 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 183 transitions, 2199 flow [2024-06-14 12:27:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:43,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:27:43,848 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)] === [2024-06-14 12:27:43,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1448882365, now seen corresponding path program 4 times [2024-06-14 12:27:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887453874] [2024-06-14 12:27:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887453874] [2024-06-14 12:27:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887453874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733956358] [2024-06-14 12:27:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:44,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:44,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 183 transitions, 2199 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:44,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:44,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:44,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:45,425 INFO L124 PetriNetUnfolderBase]: 2455/3732 cut-off events. [2024-06-14 12:27:45,425 INFO L125 PetriNetUnfolderBase]: For 66803/66807 co-relation queries the response was YES. [2024-06-14 12:27:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22609 conditions, 3732 events. 2455/3732 cut-off events. For 66803/66807 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18018 event pairs, 600 based on Foata normal form. 6/3734 useless extension candidates. Maximal degree in co-relation 22554. Up to 2898 conditions per place. [2024-06-14 12:27:45,450 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 96 selfloop transitions, 128 changer transitions 0/228 dead transitions. [2024-06-14 12:27:45,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 228 transitions, 3020 flow [2024-06-14 12:27:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:27:45,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:27:45,451 INFO L175 Difference]: Start difference. First operand has 125 places, 183 transitions, 2199 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:27:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 228 transitions, 3020 flow [2024-06-14 12:27:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2916 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:45,506 INFO L231 Difference]: Finished difference. Result has 129 places, 200 transitions, 2594 flow [2024-06-14 12:27:45,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2594, PETRI_PLACES=129, PETRI_TRANSITIONS=200} [2024-06-14 12:27:45,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 12:27:45,507 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 200 transitions, 2594 flow [2024-06-14 12:27:45,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:27:45,507 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)] === [2024-06-14 12:27:45,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1764934885, now seen corresponding path program 5 times [2024-06-14 12:27:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990804812] [2024-06-14 12:27:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:46,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990804812] [2024-06-14 12:27:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990804812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:46,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:46,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985387449] [2024-06-14 12:27:46,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:46,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:46,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:46,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:46,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 200 transitions, 2594 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:46,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:46,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:47,329 INFO L124 PetriNetUnfolderBase]: 2444/3701 cut-off events. [2024-06-14 12:27:47,329 INFO L125 PetriNetUnfolderBase]: For 74929/74937 co-relation queries the response was YES. [2024-06-14 12:27:47,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23537 conditions, 3701 events. 2444/3701 cut-off events. For 74929/74937 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 17964 event pairs, 861 based on Foata normal form. 10/3709 useless extension candidates. Maximal degree in co-relation 23480. Up to 3491 conditions per place. [2024-06-14 12:27:47,358 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 182 selfloop transitions, 39 changer transitions 0/225 dead transitions. [2024-06-14 12:27:47,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 225 transitions, 3173 flow [2024-06-14 12:27:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:27:47,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:27:47,360 INFO L175 Difference]: Start difference. First operand has 129 places, 200 transitions, 2594 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:27:47,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 225 transitions, 3173 flow [2024-06-14 12:27:47,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 3102 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:47,466 INFO L231 Difference]: Finished difference. Result has 135 places, 203 transitions, 2664 flow [2024-06-14 12:27:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2664, PETRI_PLACES=135, PETRI_TRANSITIONS=203} [2024-06-14 12:27:47,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 12:27:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 203 transitions, 2664 flow [2024-06-14 12:27:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:47,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:27:47,467 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1840969671, now seen corresponding path program 1 times [2024-06-14 12:27:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133636663] [2024-06-14 12:27:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:48,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133636663] [2024-06-14 12:27:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133636663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:48,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440116562] [2024-06-14 12:27:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:48,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:48,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 203 transitions, 2664 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:48,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:48,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:48,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:48,816 INFO L124 PetriNetUnfolderBase]: 2441/3728 cut-off events. [2024-06-14 12:27:48,816 INFO L125 PetriNetUnfolderBase]: For 79029/79029 co-relation queries the response was YES. [2024-06-14 12:27:48,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23548 conditions, 3728 events. 2441/3728 cut-off events. For 79029/79029 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18307 event pairs, 967 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 23489. Up to 3591 conditions per place. [2024-06-14 12:27:48,843 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 198 selfloop transitions, 12 changer transitions 0/214 dead transitions. [2024-06-14 12:27:48,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 214 transitions, 3136 flow [2024-06-14 12:27:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:27:48,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:27:48,845 INFO L175 Difference]: Start difference. First operand has 135 places, 203 transitions, 2664 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:27:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 214 transitions, 3136 flow [2024-06-14 12:27:48,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 214 transitions, 3044 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:48,916 INFO L231 Difference]: Finished difference. Result has 137 places, 206 transitions, 2634 flow [2024-06-14 12:27:48,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2634, PETRI_PLACES=137, PETRI_TRANSITIONS=206} [2024-06-14 12:27:48,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 12:27:48,917 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 206 transitions, 2634 flow [2024-06-14 12:27:48,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:48,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:48,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:48,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:27:48,917 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)] === [2024-06-14 12:27:48,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1059358395, now seen corresponding path program 1 times [2024-06-14 12:27:48,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:48,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382268730] [2024-06-14 12:27:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:48,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:49,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382268730] [2024-06-14 12:27:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382268730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:49,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:49,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57369904] [2024-06-14 12:27:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:49,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:49,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 206 transitions, 2634 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:49,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:49,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:49,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:50,691 INFO L124 PetriNetUnfolderBase]: 2384/3672 cut-off events. [2024-06-14 12:27:50,692 INFO L125 PetriNetUnfolderBase]: For 97522/97535 co-relation queries the response was YES. [2024-06-14 12:27:50,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24791 conditions, 3672 events. 2384/3672 cut-off events. For 97522/97535 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18704 event pairs, 605 based on Foata normal form. 12/3664 useless extension candidates. Maximal degree in co-relation 24731. Up to 3286 conditions per place. [2024-06-14 12:27:50,716 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 40 changer transitions 0/244 dead transitions. [2024-06-14 12:27:50,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 244 transitions, 3278 flow [2024-06-14 12:27:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:27:50,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:27:50,718 INFO L175 Difference]: Start difference. First operand has 137 places, 206 transitions, 2634 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:27:50,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 244 transitions, 3278 flow [2024-06-14 12:27:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 244 transitions, 3238 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:50,799 INFO L231 Difference]: Finished difference. Result has 143 places, 211 transitions, 2759 flow [2024-06-14 12:27:50,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2759, PETRI_PLACES=143, PETRI_TRANSITIONS=211} [2024-06-14 12:27:50,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-14 12:27:50,800 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 211 transitions, 2759 flow [2024-06-14 12:27:50,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:50,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:50,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:27:50,800 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)] === [2024-06-14 12:27:50,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1444263985, now seen corresponding path program 2 times [2024-06-14 12:27:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765376185] [2024-06-14 12:27:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:51,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765376185] [2024-06-14 12:27:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765376185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:51,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:51,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296343526] [2024-06-14 12:27:51,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:51,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:51,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:51,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 211 transitions, 2759 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:51,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:51,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:51,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:52,750 INFO L124 PetriNetUnfolderBase]: 2435/3769 cut-off events. [2024-06-14 12:27:52,751 INFO L125 PetriNetUnfolderBase]: For 108574/108587 co-relation queries the response was YES. [2024-06-14 12:27:52,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25983 conditions, 3769 events. 2435/3769 cut-off events. For 108574/108587 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19472 event pairs, 764 based on Foata normal form. 12/3761 useless extension candidates. Maximal degree in co-relation 25921. Up to 3384 conditions per place. [2024-06-14 12:27:52,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 46 changer transitions 0/252 dead transitions. [2024-06-14 12:27:52,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 252 transitions, 3501 flow [2024-06-14 12:27:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:27:52,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:27:52,780 INFO L175 Difference]: Start difference. First operand has 143 places, 211 transitions, 2759 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:27:52,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 252 transitions, 3501 flow [2024-06-14 12:27:52,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 3310 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:52,886 INFO L231 Difference]: Finished difference. Result has 146 places, 219 transitions, 2831 flow [2024-06-14 12:27:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2831, PETRI_PLACES=146, PETRI_TRANSITIONS=219} [2024-06-14 12:27:52,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 12:27:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 219 transitions, 2831 flow [2024-06-14 12:27:52,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:52,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:52,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:52,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:27:52,892 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:52,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1657877905, now seen corresponding path program 3 times [2024-06-14 12:27:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:52,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284437466] [2024-06-14 12:27:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:53,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:53,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284437466] [2024-06-14 12:27:53,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284437466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:53,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:53,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333782079] [2024-06-14 12:27:53,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:53,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:53,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 219 transitions, 2831 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:53,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:53,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:53,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:54,683 INFO L124 PetriNetUnfolderBase]: 2448/3802 cut-off events. [2024-06-14 12:27:54,684 INFO L125 PetriNetUnfolderBase]: For 116554/116563 co-relation queries the response was YES. [2024-06-14 12:27:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26475 conditions, 3802 events. 2448/3802 cut-off events. For 116554/116563 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19792 event pairs, 745 based on Foata normal form. 12/3798 useless extension candidates. Maximal degree in co-relation 26412. Up to 3371 conditions per place. [2024-06-14 12:27:54,714 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 60 changer transitions 0/253 dead transitions. [2024-06-14 12:27:54,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 253 transitions, 3497 flow [2024-06-14 12:27:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:27:54,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:27:54,715 INFO L175 Difference]: Start difference. First operand has 146 places, 219 transitions, 2831 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:27:54,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 253 transitions, 3497 flow [2024-06-14 12:27:54,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 253 transitions, 3373 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:54,820 INFO L231 Difference]: Finished difference. Result has 149 places, 221 transitions, 2901 flow [2024-06-14 12:27:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2901, PETRI_PLACES=149, PETRI_TRANSITIONS=221} [2024-06-14 12:27:54,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 12:27:54,822 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 221 transitions, 2901 flow [2024-06-14 12:27:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:54,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:27:54,823 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)] === [2024-06-14 12:27:54,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1071134771, now seen corresponding path program 4 times [2024-06-14 12:27:54,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:54,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379887324] [2024-06-14 12:27:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379887324] [2024-06-14 12:27:55,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379887324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:55,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182867306] [2024-06-14 12:27:55,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:56,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:56,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 221 transitions, 2901 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:56,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:56,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:56,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:56,815 INFO L124 PetriNetUnfolderBase]: 2541/3973 cut-off events. [2024-06-14 12:27:56,816 INFO L125 PetriNetUnfolderBase]: For 124807/124822 co-relation queries the response was YES. [2024-06-14 12:27:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27840 conditions, 3973 events. 2541/3973 cut-off events. For 124807/124822 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21046 event pairs, 563 based on Foata normal form. 14/3974 useless extension candidates. Maximal degree in co-relation 27776. Up to 3525 conditions per place. [2024-06-14 12:27:56,842 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 203 selfloop transitions, 49 changer transitions 0/264 dead transitions. [2024-06-14 12:27:56,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 264 transitions, 3644 flow [2024-06-14 12:27:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:27:56,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:27:56,844 INFO L175 Difference]: Start difference. First operand has 149 places, 221 transitions, 2901 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:27:56,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 264 transitions, 3644 flow [2024-06-14 12:27:56,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 264 transitions, 3482 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:56,953 INFO L231 Difference]: Finished difference. Result has 152 places, 233 transitions, 3010 flow [2024-06-14 12:27:56,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3010, PETRI_PLACES=152, PETRI_TRANSITIONS=233} [2024-06-14 12:27:56,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 12:27:56,953 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 233 transitions, 3010 flow [2024-06-14 12:27:56,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:56,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:56,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:56,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:27:56,954 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)] === [2024-06-14 12:27:56,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2029098759, now seen corresponding path program 5 times [2024-06-14 12:27:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278611516] [2024-06-14 12:27:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:58,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:58,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278611516] [2024-06-14 12:27:58,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278611516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:58,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:58,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700093739] [2024-06-14 12:27:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:58,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 233 transitions, 3010 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:58,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:58,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:58,924 INFO L124 PetriNetUnfolderBase]: 2589/4057 cut-off events. [2024-06-14 12:27:58,924 INFO L125 PetriNetUnfolderBase]: For 136425/136440 co-relation queries the response was YES. [2024-06-14 12:27:58,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28744 conditions, 4057 events. 2589/4057 cut-off events. For 136425/136440 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21679 event pairs, 582 based on Foata normal form. 18/4065 useless extension candidates. Maximal degree in co-relation 28678. Up to 3571 conditions per place. [2024-06-14 12:27:58,959 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 61 changer transitions 0/267 dead transitions. [2024-06-14 12:27:58,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 267 transitions, 3708 flow [2024-06-14 12:27:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:27:58,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:27:58,961 INFO L175 Difference]: Start difference. First operand has 152 places, 233 transitions, 3010 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:27:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 267 transitions, 3708 flow [2024-06-14 12:27:59,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 267 transitions, 3579 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:59,147 INFO L231 Difference]: Finished difference. Result has 155 places, 237 transitions, 3099 flow [2024-06-14 12:27:59,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3099, PETRI_PLACES=155, PETRI_TRANSITIONS=237} [2024-06-14 12:27:59,147 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 12:27:59,147 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 237 transitions, 3099 flow [2024-06-14 12:27:59,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:59,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:59,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:59,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:27:59,148 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)] === [2024-06-14 12:27:59,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1911011079, now seen corresponding path program 6 times [2024-06-14 12:27:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:59,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978380395] [2024-06-14 12:27:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978380395] [2024-06-14 12:28:00,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978380395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:00,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:00,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633337866] [2024-06-14 12:28:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:00,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:00,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:00,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 237 transitions, 3099 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:00,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:00,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:01,238 INFO L124 PetriNetUnfolderBase]: 2677/4211 cut-off events. [2024-06-14 12:28:01,239 INFO L125 PetriNetUnfolderBase]: For 156640/156652 co-relation queries the response was YES. [2024-06-14 12:28:01,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30122 conditions, 4211 events. 2677/4211 cut-off events. For 156640/156652 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 22792 event pairs, 597 based on Foata normal form. 40/4248 useless extension candidates. Maximal degree in co-relation 30055. Up to 3483 conditions per place. [2024-06-14 12:28:01,275 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 182 selfloop transitions, 80 changer transitions 0/274 dead transitions. [2024-06-14 12:28:01,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 274 transitions, 3845 flow [2024-06-14 12:28:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:28:01,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:28:01,276 INFO L175 Difference]: Start difference. First operand has 155 places, 237 transitions, 3099 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:28:01,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 274 transitions, 3845 flow [2024-06-14 12:28:01,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 274 transitions, 3679 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:01,440 INFO L231 Difference]: Finished difference. Result has 157 places, 239 transitions, 3175 flow [2024-06-14 12:28:01,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3175, PETRI_PLACES=157, PETRI_TRANSITIONS=239} [2024-06-14 12:28:01,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 12:28:01,441 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 239 transitions, 3175 flow [2024-06-14 12:28:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:01,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:01,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:01,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:28:01,441 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)] === [2024-06-14 12:28:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1910826381, now seen corresponding path program 1 times [2024-06-14 12:28:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194608623] [2024-06-14 12:28:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194608623] [2024-06-14 12:28:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194608623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112187169] [2024-06-14 12:28:02,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:02,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:02,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:02,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 239 transitions, 3175 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:02,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:02,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:03,459 INFO L124 PetriNetUnfolderBase]: 3059/4688 cut-off events. [2024-06-14 12:28:03,459 INFO L125 PetriNetUnfolderBase]: For 168437/168449 co-relation queries the response was YES. [2024-06-14 12:28:03,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32692 conditions, 4688 events. 3059/4688 cut-off events. For 168437/168449 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 24480 event pairs, 706 based on Foata normal form. 36/4723 useless extension candidates. Maximal degree in co-relation 32624. Up to 4029 conditions per place. [2024-06-14 12:28:03,492 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 192 selfloop transitions, 84 changer transitions 0/281 dead transitions. [2024-06-14 12:28:03,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 281 transitions, 3957 flow [2024-06-14 12:28:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:28:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:28:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:28:03,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:28:03,495 INFO L175 Difference]: Start difference. First operand has 157 places, 239 transitions, 3175 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:28:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 281 transitions, 3957 flow [2024-06-14 12:28:03,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 281 transitions, 3757 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:03,653 INFO L231 Difference]: Finished difference. Result has 160 places, 241 transitions, 3208 flow [2024-06-14 12:28:03,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3208, PETRI_PLACES=160, PETRI_TRANSITIONS=241} [2024-06-14 12:28:03,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:28:03,654 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 241 transitions, 3208 flow [2024-06-14 12:28:03,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:03,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:03,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:03,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:28:03,655 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:03,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1970942710, now seen corresponding path program 1 times [2024-06-14 12:28:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:03,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559654697] [2024-06-14 12:28:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559654697] [2024-06-14 12:28:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559654697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:04,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780166902] [2024-06-14 12:28:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:04,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:04,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:04,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 241 transitions, 3208 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:04,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:04,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:04,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:05,185 INFO L124 PetriNetUnfolderBase]: 3105/4740 cut-off events. [2024-06-14 12:28:05,185 INFO L125 PetriNetUnfolderBase]: For 163472/163476 co-relation queries the response was YES. [2024-06-14 12:28:05,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4740 events. 3105/4740 cut-off events. For 163472/163476 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24676 event pairs, 1043 based on Foata normal form. 5/4744 useless extension candidates. Maximal degree in co-relation 33076. Up to 4564 conditions per place. [2024-06-14 12:28:05,223 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 21 changer transitions 0/265 dead transitions. [2024-06-14 12:28:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 265 transitions, 3914 flow [2024-06-14 12:28:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:28:05,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:28:05,224 INFO L175 Difference]: Start difference. First operand has 160 places, 241 transitions, 3208 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:28:05,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 265 transitions, 3914 flow [2024-06-14 12:28:05,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 265 transitions, 3740 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:05,395 INFO L231 Difference]: Finished difference. Result has 160 places, 247 transitions, 3152 flow [2024-06-14 12:28:05,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3152, PETRI_PLACES=160, PETRI_TRANSITIONS=247} [2024-06-14 12:28:05,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:28:05,396 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 247 transitions, 3152 flow [2024-06-14 12:28:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:05,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:05,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:05,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:28:05,397 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)] === [2024-06-14 12:28:05,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 107474709, now seen corresponding path program 7 times [2024-06-14 12:28:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727407072] [2024-06-14 12:28:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:06,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:06,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727407072] [2024-06-14 12:28:06,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727407072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:06,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:06,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055674397] [2024-06-14 12:28:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:06,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:06,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 247 transitions, 3152 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:06,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:06,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:06,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:07,472 INFO L124 PetriNetUnfolderBase]: 2853/4472 cut-off events. [2024-06-14 12:28:07,472 INFO L125 PetriNetUnfolderBase]: For 178841/178856 co-relation queries the response was YES. [2024-06-14 12:28:07,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32523 conditions, 4472 events. 2853/4472 cut-off events. For 178841/178856 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24416 event pairs, 699 based on Foata normal form. 14/4468 useless extension candidates. Maximal degree in co-relation 32453. Up to 3852 conditions per place. [2024-06-14 12:28:07,510 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 205 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-14 12:28:07,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 277 transitions, 3868 flow [2024-06-14 12:28:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:07,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:28:07,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:28:07,512 INFO L175 Difference]: Start difference. First operand has 160 places, 247 transitions, 3152 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:28:07,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 277 transitions, 3868 flow [2024-06-14 12:28:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 277 transitions, 3824 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:07,690 INFO L231 Difference]: Finished difference. Result has 165 places, 249 transitions, 3331 flow [2024-06-14 12:28:07,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=165, PETRI_TRANSITIONS=249} [2024-06-14 12:28:07,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 12:28:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 249 transitions, 3331 flow [2024-06-14 12:28:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:07,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:07,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:28:07,692 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)] === [2024-06-14 12:28:07,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 107535159, now seen corresponding path program 8 times [2024-06-14 12:28:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303182984] [2024-06-14 12:28:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303182984] [2024-06-14 12:28:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303182984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:08,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569374410] [2024-06-14 12:28:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:09,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:09,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 249 transitions, 3331 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:09,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:09,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:09,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:10,041 INFO L124 PetriNetUnfolderBase]: 3020/4737 cut-off events. [2024-06-14 12:28:10,042 INFO L125 PetriNetUnfolderBase]: For 195238/195250 co-relation queries the response was YES. [2024-06-14 12:28:10,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35518 conditions, 4737 events. 3020/4737 cut-off events. For 195238/195250 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26083 event pairs, 636 based on Foata normal form. 20/4751 useless extension candidates. Maximal degree in co-relation 35446. Up to 4150 conditions per place. [2024-06-14 12:28:10,082 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 84 changer transitions 0/317 dead transitions. [2024-06-14 12:28:10,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 317 transitions, 4883 flow [2024-06-14 12:28:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:28:10,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:28:10,084 INFO L175 Difference]: Start difference. First operand has 165 places, 249 transitions, 3331 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:28:10,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 317 transitions, 4883 flow [2024-06-14 12:28:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 317 transitions, 4660 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:10,371 INFO L231 Difference]: Finished difference. Result has 170 places, 290 transitions, 4225 flow [2024-06-14 12:28:10,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4225, PETRI_PLACES=170, PETRI_TRANSITIONS=290} [2024-06-14 12:28:10,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:28:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 290 transitions, 4225 flow [2024-06-14 12:28:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:10,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:28:10,373 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)] === [2024-06-14 12:28:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 110336629, now seen corresponding path program 1 times [2024-06-14 12:28:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119917456] [2024-06-14 12:28:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:11,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119917456] [2024-06-14 12:28:11,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119917456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:11,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242808610] [2024-06-14 12:28:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:11,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:11,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:11,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 290 transitions, 4225 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:11,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:11,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:11,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:12,379 INFO L124 PetriNetUnfolderBase]: 3326/5071 cut-off events. [2024-06-14 12:28:12,380 INFO L125 PetriNetUnfolderBase]: For 165897/165909 co-relation queries the response was YES. [2024-06-14 12:28:12,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35599 conditions, 5071 events. 3326/5071 cut-off events. For 165897/165909 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 26639 event pairs, 720 based on Foata normal form. 16/5086 useless extension candidates. Maximal degree in co-relation 35524. Up to 4271 conditions per place. [2024-06-14 12:28:12,422 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 178 selfloop transitions, 135 changer transitions 0/318 dead transitions. [2024-06-14 12:28:12,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 318 transitions, 4984 flow [2024-06-14 12:28:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:28:12,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:28:12,424 INFO L175 Difference]: Start difference. First operand has 170 places, 290 transitions, 4225 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:28:12,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 318 transitions, 4984 flow [2024-06-14 12:28:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 318 transitions, 4780 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:12,671 INFO L231 Difference]: Finished difference. Result has 176 places, 291 transitions, 4387 flow [2024-06-14 12:28:12,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4387, PETRI_PLACES=176, PETRI_TRANSITIONS=291} [2024-06-14 12:28:12,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-14 12:28:12,672 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 291 transitions, 4387 flow [2024-06-14 12:28:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:12,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:12,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:28:12,673 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)] === [2024-06-14 12:28:12,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 225807537, now seen corresponding path program 2 times [2024-06-14 12:28:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967714256] [2024-06-14 12:28:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:13,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:13,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967714256] [2024-06-14 12:28:13,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967714256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:13,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433016156] [2024-06-14 12:28:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:13,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:13,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 291 transitions, 4387 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:13,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:13,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:14,888 INFO L124 PetriNetUnfolderBase]: 3343/5102 cut-off events. [2024-06-14 12:28:14,888 INFO L125 PetriNetUnfolderBase]: For 176386/176390 co-relation queries the response was YES. [2024-06-14 12:28:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36448 conditions, 5102 events. 3343/5102 cut-off events. For 176386/176390 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26962 event pairs, 1062 based on Foata normal form. 8/5109 useless extension candidates. Maximal degree in co-relation 36370. Up to 4840 conditions per place. [2024-06-14 12:28:14,933 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 38 changer transitions 0/323 dead transitions. [2024-06-14 12:28:14,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 5217 flow [2024-06-14 12:28:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:28:14,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:28:14,935 INFO L175 Difference]: Start difference. First operand has 176 places, 291 transitions, 4387 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:28:14,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 5217 flow [2024-06-14 12:28:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 323 transitions, 4937 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:15,176 INFO L231 Difference]: Finished difference. Result has 179 places, 294 transitions, 4271 flow [2024-06-14 12:28:15,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4271, PETRI_PLACES=179, PETRI_TRANSITIONS=294} [2024-06-14 12:28:15,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 12:28:15,176 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 294 transitions, 4271 flow [2024-06-14 12:28:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:15,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:15,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:28:15,177 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)] === [2024-06-14 12:28:15,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 225622839, now seen corresponding path program 9 times [2024-06-14 12:28:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489096402] [2024-06-14 12:28:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489096402] [2024-06-14 12:28:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489096402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:16,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:16,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880443176] [2024-06-14 12:28:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:16,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:16,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 294 transitions, 4271 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:16,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:16,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:16,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:17,300 INFO L124 PetriNetUnfolderBase]: 3123/4911 cut-off events. [2024-06-14 12:28:17,301 INFO L125 PetriNetUnfolderBase]: For 184071/184112 co-relation queries the response was YES. [2024-06-14 12:28:17,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35907 conditions, 4911 events. 3123/4911 cut-off events. For 184071/184112 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27384 event pairs, 642 based on Foata normal form. 40/4905 useless extension candidates. Maximal degree in co-relation 35829. Up to 3784 conditions per place. [2024-06-14 12:28:17,345 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 131 changer transitions 0/327 dead transitions. [2024-06-14 12:28:17,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 327 transitions, 5113 flow [2024-06-14 12:28:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:28:17,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:28:17,347 INFO L175 Difference]: Start difference. First operand has 179 places, 294 transitions, 4271 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:28:17,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 327 transitions, 5113 flow [2024-06-14 12:28:17,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 327 transitions, 4983 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:17,572 INFO L231 Difference]: Finished difference. Result has 180 places, 296 transitions, 4495 flow [2024-06-14 12:28:17,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4495, PETRI_PLACES=180, PETRI_TRANSITIONS=296} [2024-06-14 12:28:17,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 12:28:17,572 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 296 transitions, 4495 flow [2024-06-14 12:28:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:17,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:28:17,573 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:17,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1224044690, now seen corresponding path program 2 times [2024-06-14 12:28:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570424118] [2024-06-14 12:28:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:18,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570424118] [2024-06-14 12:28:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570424118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:18,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:18,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:18,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53597129] [2024-06-14 12:28:18,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:18,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:18,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 296 transitions, 4495 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:18,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:18,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:18,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:19,301 INFO L124 PetriNetUnfolderBase]: 3457/5288 cut-off events. [2024-06-14 12:28:19,301 INFO L125 PetriNetUnfolderBase]: For 184662/184666 co-relation queries the response was YES. [2024-06-14 12:28:19,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38063 conditions, 5288 events. 3457/5288 cut-off events. For 184662/184666 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28315 event pairs, 1090 based on Foata normal form. 5/5292 useless extension candidates. Maximal degree in co-relation 37984. Up to 5104 conditions per place. [2024-06-14 12:28:19,347 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 281 selfloop transitions, 27 changer transitions 0/313 dead transitions. [2024-06-14 12:28:19,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 313 transitions, 5257 flow [2024-06-14 12:28:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:28:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:28:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:28:19,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:28:19,348 INFO L175 Difference]: Start difference. First operand has 180 places, 296 transitions, 4495 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:28:19,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 313 transitions, 5257 flow [2024-06-14 12:28:19,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 313 transitions, 4951 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:19,803 INFO L231 Difference]: Finished difference. Result has 180 places, 299 transitions, 4290 flow [2024-06-14 12:28:19,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4290, PETRI_PLACES=180, PETRI_TRANSITIONS=299} [2024-06-14 12:28:19,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 12:28:19,804 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 299 transitions, 4290 flow [2024-06-14 12:28:19,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:19,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:19,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:19,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:28:19,804 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)] === [2024-06-14 12:28:19,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1113021553, now seen corresponding path program 3 times [2024-06-14 12:28:19,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:19,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905723248] [2024-06-14 12:28:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:20,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905723248] [2024-06-14 12:28:20,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905723248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:20,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:20,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531092476] [2024-06-14 12:28:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:20,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:20,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 299 transitions, 4290 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:20,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:20,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:20,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:21,952 INFO L124 PetriNetUnfolderBase]: 3585/5495 cut-off events. [2024-06-14 12:28:21,953 INFO L125 PetriNetUnfolderBase]: For 187255/187271 co-relation queries the response was YES. [2024-06-14 12:28:21,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38914 conditions, 5495 events. 3585/5495 cut-off events. For 187255/187271 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29551 event pairs, 686 based on Foata normal form. 20/5511 useless extension candidates. Maximal degree in co-relation 38834. Up to 4113 conditions per place. [2024-06-14 12:28:21,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 163 selfloop transitions, 174 changer transitions 0/342 dead transitions. [2024-06-14 12:28:21,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 342 transitions, 5478 flow [2024-06-14 12:28:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:28:22,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:28:22,001 INFO L175 Difference]: Start difference. First operand has 180 places, 299 transitions, 4290 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:28:22,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 342 transitions, 5478 flow [2024-06-14 12:28:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 342 transitions, 5416 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:22,281 INFO L231 Difference]: Finished difference. Result has 185 places, 303 transitions, 4711 flow [2024-06-14 12:28:22,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4232, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4711, PETRI_PLACES=185, PETRI_TRANSITIONS=303} [2024-06-14 12:28:22,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 12:28:22,282 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 303 transitions, 4711 flow [2024-06-14 12:28:22,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:22,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:22,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:28:22,282 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:22,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1113318223, now seen corresponding path program 4 times [2024-06-14 12:28:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461271271] [2024-06-14 12:28:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:23,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461271271] [2024-06-14 12:28:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461271271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:23,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:23,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244775934] [2024-06-14 12:28:23,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:23,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:23,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:23,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 303 transitions, 4711 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:23,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:23,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:24,347 INFO L124 PetriNetUnfolderBase]: 3602/5522 cut-off events. [2024-06-14 12:28:24,347 INFO L125 PetriNetUnfolderBase]: For 193802/193818 co-relation queries the response was YES. [2024-06-14 12:28:24,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40135 conditions, 5522 events. 3602/5522 cut-off events. For 193802/193818 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29850 event pairs, 781 based on Foata normal form. 20/5538 useless extension candidates. Maximal degree in co-relation 40055. Up to 4540 conditions per place. [2024-06-14 12:28:24,394 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 166 selfloop transitions, 166 changer transitions 0/337 dead transitions. [2024-06-14 12:28:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 337 transitions, 5691 flow [2024-06-14 12:28:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:28:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:28:24,395 INFO L175 Difference]: Start difference. First operand has 185 places, 303 transitions, 4711 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:28:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 337 transitions, 5691 flow [2024-06-14 12:28:24,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 337 transitions, 5305 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:24,722 INFO L231 Difference]: Finished difference. Result has 187 places, 305 transitions, 4732 flow [2024-06-14 12:28:24,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4732, PETRI_PLACES=187, PETRI_TRANSITIONS=305} [2024-06-14 12:28:24,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 12:28:24,723 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 305 transitions, 4732 flow [2024-06-14 12:28:24,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:24,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:24,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:24,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:28:24,725 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)] === [2024-06-14 12:28:24,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1349493583, now seen corresponding path program 5 times [2024-06-14 12:28:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352023397] [2024-06-14 12:28:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:25,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352023397] [2024-06-14 12:28:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352023397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:25,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582916926] [2024-06-14 12:28:25,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:25,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 305 transitions, 4732 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:25,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:25,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:25,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:26,948 INFO L124 PetriNetUnfolderBase]: 3738/5738 cut-off events. [2024-06-14 12:28:26,948 INFO L125 PetriNetUnfolderBase]: For 218044/218060 co-relation queries the response was YES. [2024-06-14 12:28:26,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41660 conditions, 5738 events. 3738/5738 cut-off events. For 218044/218060 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31241 event pairs, 815 based on Foata normal form. 44/5778 useless extension candidates. Maximal degree in co-relation 41580. Up to 4792 conditions per place. [2024-06-14 12:28:27,004 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 145 changer transitions 0/348 dead transitions. [2024-06-14 12:28:27,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 348 transitions, 5742 flow [2024-06-14 12:28:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:28:27,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:28:27,006 INFO L175 Difference]: Start difference. First operand has 187 places, 305 transitions, 4732 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:28:27,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 348 transitions, 5742 flow [2024-06-14 12:28:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 348 transitions, 5351 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:27,418 INFO L231 Difference]: Finished difference. Result has 190 places, 313 transitions, 4820 flow [2024-06-14 12:28:27,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4353, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4820, PETRI_PLACES=190, PETRI_TRANSITIONS=313} [2024-06-14 12:28:27,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 12:28:27,419 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 313 transitions, 4820 flow [2024-06-14 12:28:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:27,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:27,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:27,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:28:27,420 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)] === [2024-06-14 12:28:27,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 397696023, now seen corresponding path program 2 times [2024-06-14 12:28:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:27,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872324235] [2024-06-14 12:28:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:28,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:28,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872324235] [2024-06-14 12:28:28,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872324235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:28,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:28,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013927490] [2024-06-14 12:28:28,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:28,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:28,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:28,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 313 transitions, 4820 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:28,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:28,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:29,355 INFO L124 PetriNetUnfolderBase]: 3728/5724 cut-off events. [2024-06-14 12:28:29,355 INFO L125 PetriNetUnfolderBase]: For 224718/224734 co-relation queries the response was YES. [2024-06-14 12:28:29,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41853 conditions, 5724 events. 3728/5724 cut-off events. For 224718/224734 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31197 event pairs, 791 based on Foata normal form. 20/5740 useless extension candidates. Maximal degree in co-relation 41771. Up to 4916 conditions per place. [2024-06-14 12:28:29,407 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 147 changer transitions 0/339 dead transitions. [2024-06-14 12:28:29,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 339 transitions, 5608 flow [2024-06-14 12:28:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:28:29,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:28:29,409 INFO L175 Difference]: Start difference. First operand has 190 places, 313 transitions, 4820 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:28:29,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 339 transitions, 5608 flow [2024-06-14 12:28:29,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 339 transitions, 5175 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:29,958 INFO L231 Difference]: Finished difference. Result has 192 places, 313 transitions, 4693 flow [2024-06-14 12:28:29,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4693, PETRI_PLACES=192, PETRI_TRANSITIONS=313} [2024-06-14 12:28:29,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 12:28:29,959 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 313 transitions, 4693 flow [2024-06-14 12:28:29,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:29,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:29,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:28:29,960 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)] === [2024-06-14 12:28:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 391261973, now seen corresponding path program 10 times [2024-06-14 12:28:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62638528] [2024-06-14 12:28:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:30,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:30,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62638528] [2024-06-14 12:28:30,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62638528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:30,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:30,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:30,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240545281] [2024-06-14 12:28:30,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:31,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:31,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 313 transitions, 4693 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:31,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:31,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:31,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:32,059 INFO L124 PetriNetUnfolderBase]: 3462/5463 cut-off events. [2024-06-14 12:28:32,059 INFO L125 PetriNetUnfolderBase]: For 233515/233536 co-relation queries the response was YES. [2024-06-14 12:28:32,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40258 conditions, 5463 events. 3462/5463 cut-off events. For 233515/233536 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31281 event pairs, 694 based on Foata normal form. 44/5494 useless extension candidates. Maximal degree in co-relation 40177. Up to 4293 conditions per place. [2024-06-14 12:28:32,104 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 158 changer transitions 0/345 dead transitions. [2024-06-14 12:28:32,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 345 transitions, 5573 flow [2024-06-14 12:28:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:28:32,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:28:32,106 INFO L175 Difference]: Start difference. First operand has 192 places, 313 transitions, 4693 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:28:32,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 345 transitions, 5573 flow [2024-06-14 12:28:32,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 345 transitions, 5144 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:28:32,439 INFO L231 Difference]: Finished difference. Result has 192 places, 315 transitions, 4669 flow [2024-06-14 12:28:32,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4669, PETRI_PLACES=192, PETRI_TRANSITIONS=315} [2024-06-14 12:28:32,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 12:28:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 315 transitions, 4669 flow [2024-06-14 12:28:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:28:32,441 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)] === [2024-06-14 12:28:32,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1965450695, now seen corresponding path program 6 times [2024-06-14 12:28:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436043057] [2024-06-14 12:28:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:33,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436043057] [2024-06-14 12:28:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436043057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:33,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:33,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251682518] [2024-06-14 12:28:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:33,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:33,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:33,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:33,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 315 transitions, 4669 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:33,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:33,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:33,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:34,527 INFO L124 PetriNetUnfolderBase]: 3854/5938 cut-off events. [2024-06-14 12:28:34,527 INFO L125 PetriNetUnfolderBase]: For 232769/232785 co-relation queries the response was YES. [2024-06-14 12:28:34,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42052 conditions, 5938 events. 3854/5938 cut-off events. For 232769/232785 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32748 event pairs, 815 based on Foata normal form. 40/5974 useless extension candidates. Maximal degree in co-relation 41970. Up to 4992 conditions per place. [2024-06-14 12:28:34,584 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 197 selfloop transitions, 149 changer transitions 0/351 dead transitions. [2024-06-14 12:28:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 351 transitions, 5575 flow [2024-06-14 12:28:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:28:34,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:28:34,586 INFO L175 Difference]: Start difference. First operand has 192 places, 315 transitions, 4669 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:28:34,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 351 transitions, 5575 flow [2024-06-14 12:28:34,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 351 transitions, 5177 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:34,974 INFO L231 Difference]: Finished difference. Result has 194 places, 316 transitions, 4628 flow [2024-06-14 12:28:34,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4628, PETRI_PLACES=194, PETRI_TRANSITIONS=316} [2024-06-14 12:28:34,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 12:28:34,975 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 316 transitions, 4628 flow [2024-06-14 12:28:34,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:34,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:34,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:28:34,975 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:34,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2056640978, now seen corresponding path program 3 times [2024-06-14 12:28:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:34,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041317776] [2024-06-14 12:28:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041317776] [2024-06-14 12:28:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041317776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:35,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:35,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528295735] [2024-06-14 12:28:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:35,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:35,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:35,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 316 transitions, 4628 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:35,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:35,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:35,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:36,932 INFO L124 PetriNetUnfolderBase]: 3851/5936 cut-off events. [2024-06-14 12:28:36,932 INFO L125 PetriNetUnfolderBase]: For 225066/225074 co-relation queries the response was YES. [2024-06-14 12:28:36,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41832 conditions, 5936 events. 3851/5936 cut-off events. For 225066/225074 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 32895 event pairs, 1179 based on Foata normal form. 9/5943 useless extension candidates. Maximal degree in co-relation 41749. Up to 5752 conditions per place. [2024-06-14 12:28:37,001 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 293 selfloop transitions, 26 changer transitions 0/324 dead transitions. [2024-06-14 12:28:37,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 324 transitions, 5294 flow [2024-06-14 12:28:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:28:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:28:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:28:37,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:28:37,003 INFO L175 Difference]: Start difference. First operand has 194 places, 316 transitions, 4628 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:28:37,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 324 transitions, 5294 flow [2024-06-14 12:28:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 324 transitions, 4937 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:37,374 INFO L231 Difference]: Finished difference. Result has 193 places, 316 transitions, 4329 flow [2024-06-14 12:28:37,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4329, PETRI_PLACES=193, PETRI_TRANSITIONS=316} [2024-06-14 12:28:37,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:28:37,375 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 316 transitions, 4329 flow [2024-06-14 12:28:37,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:37,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:37,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:37,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:28:37,375 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:37,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1229764562, now seen corresponding path program 1 times [2024-06-14 12:28:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284187252] [2024-06-14 12:28:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:38,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284187252] [2024-06-14 12:28:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284187252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:38,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:38,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:28:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434070941] [2024-06-14 12:28:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:28:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:28:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:28:38,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:38,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 316 transitions, 4329 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) [2024-06-14 12:28:38,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:38,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:39,083 INFO L124 PetriNetUnfolderBase]: 3604/5671 cut-off events. [2024-06-14 12:28:39,083 INFO L125 PetriNetUnfolderBase]: For 200359/200359 co-relation queries the response was YES. [2024-06-14 12:28:39,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38332 conditions, 5671 events. 3604/5671 cut-off events. For 200359/200359 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32365 event pairs, 1308 based on Foata normal form. 1/5671 useless extension candidates. Maximal degree in co-relation 38248. Up to 5416 conditions per place. [2024-06-14 12:28:39,128 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 311 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-14 12:28:39,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 334 transitions, 5153 flow [2024-06-14 12:28:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:28:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:28:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:28:39,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:28:39,130 INFO L175 Difference]: Start difference. First operand has 193 places, 316 transitions, 4329 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:28:39,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 334 transitions, 5153 flow [2024-06-14 12:28:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 334 transitions, 5085 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:39,442 INFO L231 Difference]: Finished difference. Result has 194 places, 322 transitions, 4359 flow [2024-06-14 12:28:39,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4261, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4359, PETRI_PLACES=194, PETRI_TRANSITIONS=322} [2024-06-14 12:28:39,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 12:28:39,442 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 322 transitions, 4359 flow [2024-06-14 12:28:39,443 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) [2024-06-14 12:28:39,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:39,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:39,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:28:39,443 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)] === [2024-06-14 12:28:39,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1722561332, now seen corresponding path program 2 times [2024-06-14 12:28:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:39,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570936879] [2024-06-14 12:28:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570936879] [2024-06-14 12:28:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570936879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:40,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:40,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:28:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137308703] [2024-06-14 12:28:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:40,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:28:40,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:28:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:28:40,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:40,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 322 transitions, 4359 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) [2024-06-14 12:28:40,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:40,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:41,208 INFO L124 PetriNetUnfolderBase]: 3601/5667 cut-off events. [2024-06-14 12:28:41,208 INFO L125 PetriNetUnfolderBase]: For 208683/208683 co-relation queries the response was YES. [2024-06-14 12:28:41,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38909 conditions, 5667 events. 3601/5667 cut-off events. For 208683/208683 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32316 event pairs, 1307 based on Foata normal form. 1/5667 useless extension candidates. Maximal degree in co-relation 38824. Up to 5425 conditions per place. [2024-06-14 12:28:41,257 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 312 selfloop transitions, 12 changer transitions 0/330 dead transitions. [2024-06-14 12:28:41,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 330 transitions, 5035 flow [2024-06-14 12:28:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:28:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:28:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:28:41,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 12:28:41,259 INFO L175 Difference]: Start difference. First operand has 194 places, 322 transitions, 4359 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:28:41,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 330 transitions, 5035 flow [2024-06-14 12:28:41,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 330 transitions, 4990 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:28:41,611 INFO L231 Difference]: Finished difference. Result has 198 places, 322 transitions, 4344 flow [2024-06-14 12:28:41,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4344, PETRI_PLACES=198, PETRI_TRANSITIONS=322} [2024-06-14 12:28:41,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-14 12:28:41,612 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 322 transitions, 4344 flow [2024-06-14 12:28:41,612 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) [2024-06-14 12:28:41,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:41,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:28:41,613 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:41,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1235486418, now seen corresponding path program 1 times [2024-06-14 12:28:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:41,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395978300] [2024-06-14 12:28:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395978300] [2024-06-14 12:28:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395978300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:42,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731941926] [2024-06-14 12:28:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:42,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:42,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 322 transitions, 4344 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:42,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:42,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:42,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:43,618 INFO L124 PetriNetUnfolderBase]: 3734/5798 cut-off events. [2024-06-14 12:28:43,618 INFO L125 PetriNetUnfolderBase]: For 215058/215058 co-relation queries the response was YES. [2024-06-14 12:28:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39819 conditions, 5798 events. 3734/5798 cut-off events. For 215058/215058 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32415 event pairs, 1374 based on Foata normal form. 2/5799 useless extension candidates. Maximal degree in co-relation 39732. Up to 5657 conditions per place. [2024-06-14 12:28:43,678 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 316 selfloop transitions, 15 changer transitions 0/335 dead transitions. [2024-06-14 12:28:43,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 335 transitions, 5072 flow [2024-06-14 12:28:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:28:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-14 12:28:43,679 INFO L175 Difference]: Start difference. First operand has 198 places, 322 transitions, 4344 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:28:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 335 transitions, 5072 flow [2024-06-14 12:28:44,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 335 transitions, 5040 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:44,180 INFO L231 Difference]: Finished difference. Result has 200 places, 325 transitions, 4388 flow [2024-06-14 12:28:44,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4388, PETRI_PLACES=200, PETRI_TRANSITIONS=325} [2024-06-14 12:28:44,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 12:28:44,181 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 325 transitions, 4388 flow [2024-06-14 12:28:44,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:44,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:44,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:28:44,181 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:44,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash 703171384, now seen corresponding path program 1 times [2024-06-14 12:28:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:44,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413028657] [2024-06-14 12:28:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:44,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:44,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413028657] [2024-06-14 12:28:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413028657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:44,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:44,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:44,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607398789] [2024-06-14 12:28:44,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:44,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:44,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:44,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 325 transitions, 4388 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:44,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:44,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:46,056 INFO L124 PetriNetUnfolderBase]: 3879/5976 cut-off events. [2024-06-14 12:28:46,056 INFO L125 PetriNetUnfolderBase]: For 252444/252461 co-relation queries the response was YES. [2024-06-14 12:28:46,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42760 conditions, 5976 events. 3879/5976 cut-off events. For 252444/252461 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33066 event pairs, 924 based on Foata normal form. 18/5991 useless extension candidates. Maximal degree in co-relation 42672. Up to 5646 conditions per place. [2024-06-14 12:28:46,117 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 295 selfloop transitions, 69 changer transitions 0/369 dead transitions. [2024-06-14 12:28:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 369 transitions, 5622 flow [2024-06-14 12:28:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:28:46,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:28:46,119 INFO L175 Difference]: Start difference. First operand has 200 places, 325 transitions, 4388 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:28:46,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 369 transitions, 5622 flow [2024-06-14 12:28:46,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 369 transitions, 5568 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:46,591 INFO L231 Difference]: Finished difference. Result has 205 places, 343 transitions, 4791 flow [2024-06-14 12:28:46,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4791, PETRI_PLACES=205, PETRI_TRANSITIONS=343} [2024-06-14 12:28:46,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 12:28:46,592 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 343 transitions, 4791 flow [2024-06-14 12:28:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:46,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:28:46,592 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)] === [2024-06-14 12:28:46,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 893925065, now seen corresponding path program 1 times [2024-06-14 12:28:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809875436] [2024-06-14 12:28:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809875436] [2024-06-14 12:28:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809875436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:28:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119535464] [2024-06-14 12:28:47,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:28:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:47,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:28:47,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:28:47,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:47,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 343 transitions, 4791 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) [2024-06-14 12:28:47,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:47,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:47,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:48,993 INFO L124 PetriNetUnfolderBase]: 4083/6309 cut-off events. [2024-06-14 12:28:48,993 INFO L125 PetriNetUnfolderBase]: For 288401/288413 co-relation queries the response was YES. [2024-06-14 12:28:49,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46283 conditions, 6309 events. 4083/6309 cut-off events. For 288401/288413 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35314 event pairs, 876 based on Foata normal form. 28/6336 useless extension candidates. Maximal degree in co-relation 46192. Up to 5053 conditions per place. [2024-06-14 12:28:49,062 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 265 selfloop transitions, 137 changer transitions 0/407 dead transitions. [2024-06-14 12:28:49,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 407 transitions, 6169 flow [2024-06-14 12:28:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:28:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:28:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 12:28:49,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249471458773784 [2024-06-14 12:28:49,064 INFO L175 Difference]: Start difference. First operand has 205 places, 343 transitions, 4791 flow. Second operand 11 states and 201 transitions. [2024-06-14 12:28:49,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 407 transitions, 6169 flow [2024-06-14 12:28:49,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 407 transitions, 6118 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 12:28:49,504 INFO L231 Difference]: Finished difference. Result has 215 places, 351 transitions, 5208 flow [2024-06-14 12:28:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5208, PETRI_PLACES=215, PETRI_TRANSITIONS=351} [2024-06-14 12:28:49,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 12:28:49,505 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 351 transitions, 5208 flow [2024-06-14 12:28:49,505 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) [2024-06-14 12:28:49,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:49,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:28:49,506 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 338411018, now seen corresponding path program 2 times [2024-06-14 12:28:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604577393] [2024-06-14 12:28:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:50,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:50,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604577393] [2024-06-14 12:28:50,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604577393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:50,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:50,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:50,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653383172] [2024-06-14 12:28:50,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:50,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:50,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:50,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:50,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 351 transitions, 5208 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:50,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:50,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:51,611 INFO L124 PetriNetUnfolderBase]: 4127/6372 cut-off events. [2024-06-14 12:28:51,611 INFO L125 PetriNetUnfolderBase]: For 297764/297774 co-relation queries the response was YES. [2024-06-14 12:28:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47822 conditions, 6372 events. 4127/6372 cut-off events. For 297764/297774 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35878 event pairs, 954 based on Foata normal form. 12/6383 useless extension candidates. Maximal degree in co-relation 47728. Up to 6024 conditions per place. [2024-06-14 12:28:51,680 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 82 changer transitions 0/395 dead transitions. [2024-06-14 12:28:51,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 395 transitions, 6531 flow [2024-06-14 12:28:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:28:51,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:28:51,682 INFO L175 Difference]: Start difference. First operand has 215 places, 351 transitions, 5208 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:28:51,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 395 transitions, 6531 flow [2024-06-14 12:28:52,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 395 transitions, 6353 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:52,272 INFO L231 Difference]: Finished difference. Result has 217 places, 367 transitions, 5404 flow [2024-06-14 12:28:52,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5030, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5404, PETRI_PLACES=217, PETRI_TRANSITIONS=367} [2024-06-14 12:28:52,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 12:28:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 367 transitions, 5404 flow [2024-06-14 12:28:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:28:52,274 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:52,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1689738778, now seen corresponding path program 1 times [2024-06-14 12:28:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:52,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615246108] [2024-06-14 12:28:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615246108] [2024-06-14 12:28:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615246108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470603150] [2024-06-14 12:28:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:53,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:28:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 367 transitions, 5404 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:53,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:53,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:28:53,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:54,275 INFO L124 PetriNetUnfolderBase]: 4271/6520 cut-off events. [2024-06-14 12:28:54,276 INFO L125 PetriNetUnfolderBase]: For 304234/304238 co-relation queries the response was YES. [2024-06-14 12:28:54,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48818 conditions, 6520 events. 4271/6520 cut-off events. For 304234/304238 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36149 event pairs, 1359 based on Foata normal form. 5/6524 useless extension candidates. Maximal degree in co-relation 48722. Up to 6428 conditions per place. [2024-06-14 12:28:54,342 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 355 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2024-06-14 12:28:54,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 392 transitions, 6410 flow [2024-06-14 12:28:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:28:54,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:28:54,343 INFO L175 Difference]: Start difference. First operand has 217 places, 367 transitions, 5404 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:28:54,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 392 transitions, 6410 flow [2024-06-14 12:28:54,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 392 transitions, 6289 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:54,953 INFO L231 Difference]: Finished difference. Result has 222 places, 373 transitions, 5443 flow [2024-06-14 12:28:54,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5443, PETRI_PLACES=222, PETRI_TRANSITIONS=373} [2024-06-14 12:28:54,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:28:54,953 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 373 transitions, 5443 flow [2024-06-14 12:28:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:54,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:54,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:54,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:28:54,955 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:54,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash 969682928, now seen corresponding path program 3 times [2024-06-14 12:28:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765930541] [2024-06-14 12:28:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765930541] [2024-06-14 12:28:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765930541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:55,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436911666] [2024-06-14 12:28:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:55,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:55,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 373 transitions, 5443 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:55,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:55,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:55,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:57,090 INFO L124 PetriNetUnfolderBase]: 4138/6381 cut-off events. [2024-06-14 12:28:57,090 INFO L125 PetriNetUnfolderBase]: For 315750/315762 co-relation queries the response was YES. [2024-06-14 12:28:57,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48403 conditions, 6381 events. 4138/6381 cut-off events. For 315750/315762 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 35794 event pairs, 930 based on Foata normal form. 14/6394 useless extension candidates. Maximal degree in co-relation 48306. Up to 6036 conditions per place. [2024-06-14 12:28:57,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 88 changer transitions 0/396 dead transitions. [2024-06-14 12:28:57,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 396 transitions, 6479 flow [2024-06-14 12:28:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:28:57,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:28:57,166 INFO L175 Difference]: Start difference. First operand has 222 places, 373 transitions, 5443 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:28:57,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 396 transitions, 6479 flow [2024-06-14 12:28:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 396 transitions, 6387 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:57,886 INFO L231 Difference]: Finished difference. Result has 226 places, 373 transitions, 5535 flow [2024-06-14 12:28:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5351, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5535, PETRI_PLACES=226, PETRI_TRANSITIONS=373} [2024-06-14 12:28:57,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 12:28:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 373 transitions, 5535 flow [2024-06-14 12:28:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:28:57,887 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)] === [2024-06-14 12:28:57,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1617196923, now seen corresponding path program 2 times [2024-06-14 12:28:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812934271] [2024-06-14 12:28:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812934271] [2024-06-14 12:28:58,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812934271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:58,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:58,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:58,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384677831] [2024-06-14 12:28:58,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:58,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:59,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 373 transitions, 5535 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:59,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:59,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:59,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:00,381 INFO L124 PetriNetUnfolderBase]: 4102/6325 cut-off events. [2024-06-14 12:29:00,381 INFO L125 PetriNetUnfolderBase]: For 327593/327605 co-relation queries the response was YES. [2024-06-14 12:29:00,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47713 conditions, 6325 events. 4102/6325 cut-off events. For 327593/327605 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 35374 event pairs, 872 based on Foata normal form. 32/6356 useless extension candidates. Maximal degree in co-relation 47614. Up to 5225 conditions per place. [2024-06-14 12:29:00,457 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 150 changer transitions 0/409 dead transitions. [2024-06-14 12:29:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 409 transitions, 6515 flow [2024-06-14 12:29:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:29:00,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:29:00,458 INFO L175 Difference]: Start difference. First operand has 226 places, 373 transitions, 5535 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:29:00,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 409 transitions, 6515 flow [2024-06-14 12:29:01,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 409 transitions, 6319 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:01,108 INFO L231 Difference]: Finished difference. Result has 229 places, 373 transitions, 5655 flow [2024-06-14 12:29:01,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5339, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5655, PETRI_PLACES=229, PETRI_TRANSITIONS=373} [2024-06-14 12:29:01,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 12:29:01,109 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 373 transitions, 5655 flow [2024-06-14 12:29:01,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:01,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:01,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:01,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:29:01,110 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:01,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 341492705, now seen corresponding path program 3 times [2024-06-14 12:29:01,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:01,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101436697] [2024-06-14 12:29:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:01,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101436697] [2024-06-14 12:29:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101436697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922029200] [2024-06-14 12:29:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:02,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 373 transitions, 5655 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:02,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:02,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:02,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:03,422 INFO L124 PetriNetUnfolderBase]: 4255/6580 cut-off events. [2024-06-14 12:29:03,422 INFO L125 PetriNetUnfolderBase]: For 349465/349477 co-relation queries the response was YES. [2024-06-14 12:29:03,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50418 conditions, 6580 events. 4255/6580 cut-off events. For 349465/349477 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 37156 event pairs, 881 based on Foata normal form. 28/6607 useless extension candidates. Maximal degree in co-relation 50318. Up to 4638 conditions per place. [2024-06-14 12:29:03,494 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 269 selfloop transitions, 150 changer transitions 0/426 dead transitions. [2024-06-14 12:29:03,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 426 transitions, 7037 flow [2024-06-14 12:29:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:29:03,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:29:03,496 INFO L175 Difference]: Start difference. First operand has 229 places, 373 transitions, 5655 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:29:03,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 426 transitions, 7037 flow [2024-06-14 12:29:04,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 426 transitions, 6713 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:29:04,229 INFO L231 Difference]: Finished difference. Result has 231 places, 377 transitions, 5807 flow [2024-06-14 12:29:04,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5807, PETRI_PLACES=231, PETRI_TRANSITIONS=377} [2024-06-14 12:29:04,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:29:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 377 transitions, 5807 flow [2024-06-14 12:29:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:04,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:04,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:29:04,231 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)] === [2024-06-14 12:29:04,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1046646822, now seen corresponding path program 4 times [2024-06-14 12:29:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120528399] [2024-06-14 12:29:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:05,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120528399] [2024-06-14 12:29:05,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120528399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:05,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:05,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:05,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894568820] [2024-06-14 12:29:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:05,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:05,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:05,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:05,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 377 transitions, 5807 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:05,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:05,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:05,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:06,481 INFO L124 PetriNetUnfolderBase]: 4266/6604 cut-off events. [2024-06-14 12:29:06,481 INFO L125 PetriNetUnfolderBase]: For 359159/359165 co-relation queries the response was YES. [2024-06-14 12:29:06,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51050 conditions, 6604 events. 4266/6604 cut-off events. For 359159/359165 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37793 event pairs, 1300 based on Foata normal form. 7/6606 useless extension candidates. Maximal degree in co-relation 50948. Up to 6248 conditions per place. [2024-06-14 12:29:06,552 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 304 selfloop transitions, 93 changer transitions 0/404 dead transitions. [2024-06-14 12:29:06,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 404 transitions, 6855 flow [2024-06-14 12:29:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:29:06,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:29:06,553 INFO L175 Difference]: Start difference. First operand has 231 places, 377 transitions, 5807 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:29:06,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 404 transitions, 6855 flow [2024-06-14 12:29:07,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 404 transitions, 6680 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:07,260 INFO L231 Difference]: Finished difference. Result has 233 places, 382 transitions, 5929 flow [2024-06-14 12:29:07,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5929, PETRI_PLACES=233, PETRI_TRANSITIONS=382} [2024-06-14 12:29:07,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 12:29:07,260 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 382 transitions, 5929 flow [2024-06-14 12:29:07,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:07,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:07,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:29:07,261 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:07,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1046945724, now seen corresponding path program 2 times [2024-06-14 12:29:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048382090] [2024-06-14 12:29:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048382090] [2024-06-14 12:29:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048382090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:08,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688661280] [2024-06-14 12:29:08,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:08,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:29:08,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 382 transitions, 5929 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:08,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:08,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:29:08,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:09,442 INFO L124 PetriNetUnfolderBase]: 4394/6728 cut-off events. [2024-06-14 12:29:09,442 INFO L125 PetriNetUnfolderBase]: For 346985/346989 co-relation queries the response was YES. [2024-06-14 12:29:09,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51568 conditions, 6728 events. 4394/6728 cut-off events. For 346985/346989 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37751 event pairs, 1404 based on Foata normal form. 5/6732 useless extension candidates. Maximal degree in co-relation 51465. Up to 6635 conditions per place. [2024-06-14 12:29:09,517 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 360 selfloop transitions, 37 changer transitions 0/400 dead transitions. [2024-06-14 12:29:09,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 400 transitions, 6913 flow [2024-06-14 12:29:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:29:09,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:29:09,519 INFO L175 Difference]: Start difference. First operand has 233 places, 382 transitions, 5929 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:29:09,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 400 transitions, 6913 flow [2024-06-14 12:29:10,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 400 transitions, 6729 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:10,206 INFO L231 Difference]: Finished difference. Result has 234 places, 385 transitions, 5879 flow [2024-06-14 12:29:10,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5879, PETRI_PLACES=234, PETRI_TRANSITIONS=385} [2024-06-14 12:29:10,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 12:29:10,206 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 385 transitions, 5879 flow [2024-06-14 12:29:10,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:10,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:10,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:10,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:29:10,207 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)] === [2024-06-14 12:29:10,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -709319212, now seen corresponding path program 5 times [2024-06-14 12:29:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363377099] [2024-06-14 12:29:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:11,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363377099] [2024-06-14 12:29:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363377099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:11,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:11,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402627087] [2024-06-14 12:29:11,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:11,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:11,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:11,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:11,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 385 transitions, 5879 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:11,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:11,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:11,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:12,368 INFO L124 PetriNetUnfolderBase]: 4277/6611 cut-off events. [2024-06-14 12:29:12,368 INFO L125 PetriNetUnfolderBase]: For 335559/335571 co-relation queries the response was YES. [2024-06-14 12:29:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50466 conditions, 6611 events. 4277/6611 cut-off events. For 335559/335571 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37534 event pairs, 977 based on Foata normal form. 14/6624 useless extension candidates. Maximal degree in co-relation 50364. Up to 6257 conditions per place. [2024-06-14 12:29:12,445 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 304 selfloop transitions, 96 changer transitions 0/408 dead transitions. [2024-06-14 12:29:12,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 408 transitions, 6917 flow [2024-06-14 12:29:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:29:12,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:29:12,460 INFO L175 Difference]: Start difference. First operand has 234 places, 385 transitions, 5879 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:29:12,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 408 transitions, 6917 flow [2024-06-14 12:29:13,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 408 transitions, 6828 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:13,217 INFO L231 Difference]: Finished difference. Result has 236 places, 390 transitions, 6072 flow [2024-06-14 12:29:13,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6072, PETRI_PLACES=236, PETRI_TRANSITIONS=390} [2024-06-14 12:29:13,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 12:29:13,220 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 390 transitions, 6072 flow [2024-06-14 12:29:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:13,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:13,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:29:13,220 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash -409626323, now seen corresponding path program 4 times [2024-06-14 12:29:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008740140] [2024-06-14 12:29:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008740140] [2024-06-14 12:29:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008740140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:14,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:14,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314440786] [2024-06-14 12:29:14,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:14,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:14,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 390 transitions, 6072 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:14,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:14,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:14,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:15,581 INFO L124 PetriNetUnfolderBase]: 4510/6999 cut-off events. [2024-06-14 12:29:15,581 INFO L125 PetriNetUnfolderBase]: For 364101/364117 co-relation queries the response was YES. [2024-06-14 12:29:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53329 conditions, 6999 events. 4510/6999 cut-off events. For 364101/364117 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40409 event pairs, 951 based on Foata normal form. 32/7027 useless extension candidates. Maximal degree in co-relation 53227. Up to 5411 conditions per place. [2024-06-14 12:29:15,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 256 selfloop transitions, 173 changer transitions 0/437 dead transitions. [2024-06-14 12:29:15,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 437 transitions, 7429 flow [2024-06-14 12:29:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:29:15,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:29:15,659 INFO L175 Difference]: Start difference. First operand has 236 places, 390 transitions, 6072 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:29:15,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 437 transitions, 7429 flow [2024-06-14 12:29:16,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 437 transitions, 7253 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:16,429 INFO L231 Difference]: Finished difference. Result has 241 places, 396 transitions, 6403 flow [2024-06-14 12:29:16,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6403, PETRI_PLACES=241, PETRI_TRANSITIONS=396} [2024-06-14 12:29:16,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 12:29:16,430 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 396 transitions, 6403 flow [2024-06-14 12:29:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:16,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:16,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:16,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:29:16,430 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)] === [2024-06-14 12:29:16,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1894657473, now seen corresponding path program 5 times [2024-06-14 12:29:16,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:16,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397761833] [2024-06-14 12:29:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:17,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397761833] [2024-06-14 12:29:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397761833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:17,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:17,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200328676] [2024-06-14 12:29:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:17,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:17,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 396 transitions, 6403 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:17,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:17,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:18,781 INFO L124 PetriNetUnfolderBase]: 4646/7227 cut-off events. [2024-06-14 12:29:18,782 INFO L125 PetriNetUnfolderBase]: For 386863/386879 co-relation queries the response was YES. [2024-06-14 12:29:18,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56082 conditions, 7227 events. 4646/7227 cut-off events. For 386863/386879 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 41984 event pairs, 919 based on Foata normal form. 32/7255 useless extension candidates. Maximal degree in co-relation 55979. Up to 3977 conditions per place. [2024-06-14 12:29:18,880 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 247 selfloop transitions, 193 changer transitions 0/448 dead transitions. [2024-06-14 12:29:18,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 448 transitions, 7831 flow [2024-06-14 12:29:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:29:18,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:29:18,882 INFO L175 Difference]: Start difference. First operand has 241 places, 396 transitions, 6403 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:29:18,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 448 transitions, 7831 flow [2024-06-14 12:29:19,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 448 transitions, 7682 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:19,851 INFO L231 Difference]: Finished difference. Result has 248 places, 399 transitions, 6832 flow [2024-06-14 12:29:19,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6832, PETRI_PLACES=248, PETRI_TRANSITIONS=399} [2024-06-14 12:29:19,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-14 12:29:19,852 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 399 transitions, 6832 flow [2024-06-14 12:29:19,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:19,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:19,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:19,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:29:19,853 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)] === [2024-06-14 12:29:19,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1115372619, now seen corresponding path program 6 times [2024-06-14 12:29:19,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:19,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254974322] [2024-06-14 12:29:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254974322] [2024-06-14 12:29:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254974322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819639231] [2024-06-14 12:29:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:20,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:20,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 399 transitions, 6832 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:20,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:20,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:20,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:22,509 INFO L124 PetriNetUnfolderBase]: 4654/7247 cut-off events. [2024-06-14 12:29:22,510 INFO L125 PetriNetUnfolderBase]: For 400085/400101 co-relation queries the response was YES. [2024-06-14 12:29:22,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57352 conditions, 7247 events. 4654/7247 cut-off events. For 400085/400101 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 42336 event pairs, 1031 based on Foata normal form. 32/7275 useless extension candidates. Maximal degree in co-relation 57246. Up to 5687 conditions per place. [2024-06-14 12:29:22,594 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 167 changer transitions 0/441 dead transitions. [2024-06-14 12:29:22,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 441 transitions, 8121 flow [2024-06-14 12:29:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:29:22,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:29:22,596 INFO L175 Difference]: Start difference. First operand has 248 places, 399 transitions, 6832 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:29:22,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 441 transitions, 8121 flow [2024-06-14 12:29:23,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 441 transitions, 7883 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:23,515 INFO L231 Difference]: Finished difference. Result has 252 places, 400 transitions, 6987 flow [2024-06-14 12:29:23,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6594, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6987, PETRI_PLACES=252, PETRI_TRANSITIONS=400} [2024-06-14 12:29:23,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:29:23,517 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 400 transitions, 6987 flow [2024-06-14 12:29:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:23,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:29:23,518 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash -354640090, now seen corresponding path program 3 times [2024-06-14 12:29:23,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:23,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759115499] [2024-06-14 12:29:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:24,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:24,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759115499] [2024-06-14 12:29:24,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759115499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:24,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:24,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:24,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564021666] [2024-06-14 12:29:24,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:24,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:24,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:29:24,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 400 transitions, 6987 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:24,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:24,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:29:24,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:26,059 INFO L124 PetriNetUnfolderBase]: 4786/7383 cut-off events. [2024-06-14 12:29:26,059 INFO L125 PetriNetUnfolderBase]: For 398301/398309 co-relation queries the response was YES. [2024-06-14 12:29:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58612 conditions, 7383 events. 4786/7383 cut-off events. For 398301/398309 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42813 event pairs, 1537 based on Foata normal form. 9/7390 useless extension candidates. Maximal degree in co-relation 58504. Up to 7288 conditions per place. [2024-06-14 12:29:26,150 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 370 selfloop transitions, 40 changer transitions 0/413 dead transitions. [2024-06-14 12:29:26,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 413 transitions, 7980 flow [2024-06-14 12:29:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:29:26,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521594684385382 [2024-06-14 12:29:26,151 INFO L175 Difference]: Start difference. First operand has 252 places, 400 transitions, 6987 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:29:26,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 413 transitions, 7980 flow [2024-06-14 12:29:27,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 413 transitions, 7246 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 12:29:27,451 INFO L231 Difference]: Finished difference. Result has 249 places, 403 transitions, 6388 flow [2024-06-14 12:29:27,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6253, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6388, PETRI_PLACES=249, PETRI_TRANSITIONS=403} [2024-06-14 12:29:27,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:29:27,452 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 403 transitions, 6388 flow [2024-06-14 12:29:27,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:27,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:27,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:27,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:29:27,452 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:27,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1360908950, now seen corresponding path program 6 times [2024-06-14 12:29:27,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:27,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875751195] [2024-06-14 12:29:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:28,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:28,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875751195] [2024-06-14 12:29:28,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875751195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:28,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:28,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:28,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067377251] [2024-06-14 12:29:28,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:28,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:28,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 403 transitions, 6388 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:28,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:28,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:28,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:29,761 INFO L124 PetriNetUnfolderBase]: 4653/7246 cut-off events. [2024-06-14 12:29:29,761 INFO L125 PetriNetUnfolderBase]: For 396243/396259 co-relation queries the response was YES. [2024-06-14 12:29:29,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55668 conditions, 7246 events. 4653/7246 cut-off events. For 396243/396259 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42474 event pairs, 1115 based on Foata normal form. 18/7260 useless extension candidates. Maximal degree in co-relation 55562. Up to 6890 conditions per place. [2024-06-14 12:29:29,841 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 311 selfloop transitions, 94 changer transitions 0/414 dead transitions. [2024-06-14 12:29:29,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 414 transitions, 7243 flow [2024-06-14 12:29:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:29:29,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:29:29,842 INFO L175 Difference]: Start difference. First operand has 249 places, 403 transitions, 6388 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:29:29,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 414 transitions, 7243 flow [2024-06-14 12:29:30,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 414 transitions, 7107 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:30,876 INFO L231 Difference]: Finished difference. Result has 252 places, 403 transitions, 6448 flow [2024-06-14 12:29:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6448, PETRI_PLACES=252, PETRI_TRANSITIONS=403} [2024-06-14 12:29:30,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:29:30,877 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 403 transitions, 6448 flow [2024-06-14 12:29:30,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:30,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:30,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:29:30,878 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:30,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1360909322, now seen corresponding path program 4 times [2024-06-14 12:29:30,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:30,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984761482] [2024-06-14 12:29:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:31,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:31,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984761482] [2024-06-14 12:29:31,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984761482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:31,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:31,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:31,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894344472] [2024-06-14 12:29:31,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:31,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:31,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:31,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:29:31,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 403 transitions, 6448 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:31,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:31,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:29:31,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:33,151 INFO L124 PetriNetUnfolderBase]: 4777/7371 cut-off events. [2024-06-14 12:29:33,151 INFO L125 PetriNetUnfolderBase]: For 408097/408105 co-relation queries the response was YES. [2024-06-14 12:29:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56685 conditions, 7371 events. 4777/7371 cut-off events. For 408097/408105 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42746 event pairs, 1531 based on Foata normal form. 9/7378 useless extension candidates. Maximal degree in co-relation 56578. Up to 7277 conditions per place. [2024-06-14 12:29:33,234 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 371 selfloop transitions, 38 changer transitions 0/412 dead transitions. [2024-06-14 12:29:33,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 412 transitions, 7296 flow [2024-06-14 12:29:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:29:33,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521594684385382 [2024-06-14 12:29:33,235 INFO L175 Difference]: Start difference. First operand has 252 places, 403 transitions, 6448 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:29:33,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 412 transitions, 7296 flow [2024-06-14 12:29:34,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 412 transitions, 6962 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:34,262 INFO L231 Difference]: Finished difference. Result has 252 places, 403 transitions, 6196 flow [2024-06-14 12:29:34,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6196, PETRI_PLACES=252, PETRI_TRANSITIONS=403} [2024-06-14 12:29:34,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:29:34,262 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 403 transitions, 6196 flow [2024-06-14 12:29:34,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:34,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:34,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:34,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:29:34,263 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)] === [2024-06-14 12:29:34,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 623829098, now seen corresponding path program 1 times [2024-06-14 12:29:34,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:34,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591207434] [2024-06-14 12:29:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:35,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591207434] [2024-06-14 12:29:35,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591207434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:35,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:35,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041354579] [2024-06-14 12:29:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:35,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:35,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 403 transitions, 6196 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) [2024-06-14 12:29:35,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:35,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:35,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:36,386 INFO L124 PetriNetUnfolderBase]: 4406/6983 cut-off events. [2024-06-14 12:29:36,387 INFO L125 PetriNetUnfolderBase]: For 371823/371823 co-relation queries the response was YES. [2024-06-14 12:29:36,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52809 conditions, 6983 events. 4406/6983 cut-off events. For 371823/371823 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42108 event pairs, 1637 based on Foata normal form. 1/6983 useless extension candidates. Maximal degree in co-relation 52701. Up to 6719 conditions per place. [2024-06-14 12:29:36,465 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 396 selfloop transitions, 15 changer transitions 0/421 dead transitions. [2024-06-14 12:29:36,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 421 transitions, 7140 flow [2024-06-14 12:29:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:29:36,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:29:36,468 INFO L175 Difference]: Start difference. First operand has 252 places, 403 transitions, 6196 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:29:36,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 421 transitions, 7140 flow [2024-06-14 12:29:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 421 transitions, 7030 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:37,307 INFO L231 Difference]: Finished difference. Result has 252 places, 406 transitions, 6188 flow [2024-06-14 12:29:37,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6086, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6188, PETRI_PLACES=252, PETRI_TRANSITIONS=406} [2024-06-14 12:29:37,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:29:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 406 transitions, 6188 flow [2024-06-14 12:29:37,316 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) [2024-06-14 12:29:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:29:37,316 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:37,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 623949068, now seen corresponding path program 2 times [2024-06-14 12:29:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189956971] [2024-06-14 12:29:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:38,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189956971] [2024-06-14 12:29:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189956971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:38,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:38,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227234480] [2024-06-14 12:29:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:38,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:38,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:38,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 406 transitions, 6188 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) [2024-06-14 12:29:38,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:38,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:38,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:39,391 INFO L124 PetriNetUnfolderBase]: 4411/6990 cut-off events. [2024-06-14 12:29:39,392 INFO L125 PetriNetUnfolderBase]: For 383461/383461 co-relation queries the response was YES. [2024-06-14 12:29:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53345 conditions, 6990 events. 4411/6990 cut-off events. For 383461/383461 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42165 event pairs, 1638 based on Foata normal form. 1/6990 useless extension candidates. Maximal degree in co-relation 53236. Up to 6710 conditions per place. [2024-06-14 12:29:39,468 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 388 selfloop transitions, 27 changer transitions 0/425 dead transitions. [2024-06-14 12:29:39,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 425 transitions, 7298 flow [2024-06-14 12:29:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:29:39,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:29:39,474 INFO L175 Difference]: Start difference. First operand has 252 places, 406 transitions, 6188 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:29:39,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 425 transitions, 7298 flow [2024-06-14 12:29:40,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 425 transitions, 7218 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:40,311 INFO L231 Difference]: Finished difference. Result has 254 places, 412 transitions, 6306 flow [2024-06-14 12:29:40,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6108, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6306, PETRI_PLACES=254, PETRI_TRANSITIONS=412} [2024-06-14 12:29:40,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:29:40,312 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 412 transitions, 6306 flow [2024-06-14 12:29:40,312 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) [2024-06-14 12:29:40,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:40,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:40,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:29:40,312 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:40,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -532002808, now seen corresponding path program 1 times [2024-06-14 12:29:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:40,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886696039] [2024-06-14 12:29:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:40,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886696039] [2024-06-14 12:29:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886696039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476760603] [2024-06-14 12:29:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:41,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:41,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 412 transitions, 6306 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) [2024-06-14 12:29:41,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:41,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:41,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:42,399 INFO L124 PetriNetUnfolderBase]: 4543/7124 cut-off events. [2024-06-14 12:29:42,399 INFO L125 PetriNetUnfolderBase]: For 397520/397520 co-relation queries the response was YES. [2024-06-14 12:29:42,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54620 conditions, 7124 events. 4543/7124 cut-off events. For 397520/397520 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42294 event pairs, 1707 based on Foata normal form. 1/7124 useless extension candidates. Maximal degree in co-relation 54510. Up to 6963 conditions per place. [2024-06-14 12:29:42,481 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 403 selfloop transitions, 24 changer transitions 0/431 dead transitions. [2024-06-14 12:29:42,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 431 transitions, 7382 flow [2024-06-14 12:29:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:29:42,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:29:42,482 INFO L175 Difference]: Start difference. First operand has 254 places, 412 transitions, 6306 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:29:42,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 431 transitions, 7382 flow [2024-06-14 12:29:43,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 431 transitions, 7301 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:43,267 INFO L231 Difference]: Finished difference. Result has 258 places, 418 transitions, 6357 flow [2024-06-14 12:29:43,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6357, PETRI_PLACES=258, PETRI_TRANSITIONS=418} [2024-06-14 12:29:43,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 12:29:43,268 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 418 transitions, 6357 flow [2024-06-14 12:29:43,268 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) [2024-06-14 12:29:43,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:43,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:43,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:29:43,268 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1860032324, now seen corresponding path program 2 times [2024-06-14 12:29:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073538368] [2024-06-14 12:29:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:44,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:44,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073538368] [2024-06-14 12:29:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073538368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:44,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:44,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207574856] [2024-06-14 12:29:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:44,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:44,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 418 transitions, 6357 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) [2024-06-14 12:29:44,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:44,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:44,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:45,399 INFO L124 PetriNetUnfolderBase]: 4548/7131 cut-off events. [2024-06-14 12:29:45,399 INFO L125 PetriNetUnfolderBase]: For 410908/410908 co-relation queries the response was YES. [2024-06-14 12:29:45,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55329 conditions, 7131 events. 4548/7131 cut-off events. For 410908/410908 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42332 event pairs, 1705 based on Foata normal form. 1/7131 useless extension candidates. Maximal degree in co-relation 55217. Up to 6991 conditions per place. [2024-06-14 12:29:45,477 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 411 selfloop transitions, 15 changer transitions 0/430 dead transitions. [2024-06-14 12:29:45,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 430 transitions, 7281 flow [2024-06-14 12:29:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:29:45,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-14 12:29:45,478 INFO L175 Difference]: Start difference. First operand has 258 places, 418 transitions, 6357 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:29:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 430 transitions, 7281 flow [2024-06-14 12:29:46,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 430 transitions, 7228 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:46,433 INFO L231 Difference]: Finished difference. Result has 262 places, 421 transitions, 6388 flow [2024-06-14 12:29:46,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6388, PETRI_PLACES=262, PETRI_TRANSITIONS=421} [2024-06-14 12:29:46,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 12:29:46,434 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 421 transitions, 6388 flow [2024-06-14 12:29:46,434 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) [2024-06-14 12:29:46,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:46,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:46,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:29:46,434 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:46,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 628590884, now seen corresponding path program 3 times [2024-06-14 12:29:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:46,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355958348] [2024-06-14 12:29:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:46,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:47,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355958348] [2024-06-14 12:29:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355958348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:47,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390438028] [2024-06-14 12:29:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:47,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:47,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:47,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:47,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 421 transitions, 6388 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) [2024-06-14 12:29:47,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:47,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:48,719 INFO L124 PetriNetUnfolderBase]: 4545/7127 cut-off events. [2024-06-14 12:29:48,720 INFO L125 PetriNetUnfolderBase]: For 421770/421770 co-relation queries the response was YES. [2024-06-14 12:29:48,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55494 conditions, 7127 events. 4545/7127 cut-off events. For 421770/421770 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 42308 event pairs, 1705 based on Foata normal form. 1/7127 useless extension candidates. Maximal degree in co-relation 55380. Up to 6981 conditions per place. [2024-06-14 12:29:48,789 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 406 selfloop transitions, 20 changer transitions 0/430 dead transitions. [2024-06-14 12:29:48,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 430 transitions, 7270 flow [2024-06-14 12:29:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:29:48,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 12:29:48,791 INFO L175 Difference]: Start difference. First operand has 262 places, 421 transitions, 6388 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:29:48,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 430 transitions, 7270 flow [2024-06-14 12:29:49,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 430 transitions, 7202 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:49,662 INFO L231 Difference]: Finished difference. Result has 264 places, 421 transitions, 6366 flow [2024-06-14 12:29:49,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6366, PETRI_PLACES=264, PETRI_TRANSITIONS=421} [2024-06-14 12:29:49,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:29:49,664 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 421 transitions, 6366 flow [2024-06-14 12:29:49,664 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) [2024-06-14 12:29:49,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:49,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:49,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:29:49,665 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:49,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1361093648, now seen corresponding path program 3 times [2024-06-14 12:29:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:49,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732842557] [2024-06-14 12:29:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:49,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:50,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732842557] [2024-06-14 12:29:50,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732842557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:50,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:50,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199542191] [2024-06-14 12:29:50,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:50,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:50,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:50,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 421 transitions, 6366 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) [2024-06-14 12:29:50,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:50,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:50,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:51,943 INFO L124 PetriNetUnfolderBase]: 4427/7008 cut-off events. [2024-06-14 12:29:51,944 INFO L125 PetriNetUnfolderBase]: For 432623/432623 co-relation queries the response was YES. [2024-06-14 12:29:51,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54929 conditions, 7008 events. 4427/7008 cut-off events. For 432623/432623 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42208 event pairs, 1640 based on Foata normal form. 1/7008 useless extension candidates. Maximal degree in co-relation 54814. Up to 6753 conditions per place. [2024-06-14 12:29:52,025 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 402 selfloop transitions, 15 changer transitions 0/430 dead transitions. [2024-06-14 12:29:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 430 transitions, 7230 flow [2024-06-14 12:29:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:29:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 12:29:52,027 INFO L175 Difference]: Start difference. First operand has 264 places, 421 transitions, 6366 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:29:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 430 transitions, 7230 flow [2024-06-14 12:29:53,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 430 transitions, 7116 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:53,132 INFO L231 Difference]: Finished difference. Result has 265 places, 421 transitions, 6288 flow [2024-06-14 12:29:53,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=265, PETRI_TRANSITIONS=421} [2024-06-14 12:29:53,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 12:29:53,136 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 421 transitions, 6288 flow [2024-06-14 12:29:53,136 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) [2024-06-14 12:29:53,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:53,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:29:53,137 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)] === [2024-06-14 12:29:53,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash -136139036, now seen corresponding path program 1 times [2024-06-14 12:29:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492421762] [2024-06-14 12:29:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492421762] [2024-06-14 12:29:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492421762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:29:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391438742] [2024-06-14 12:29:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:54,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:29:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:29:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:29:54,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:54,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 421 transitions, 6288 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) [2024-06-14 12:29:54,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:54,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:54,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:56,274 INFO L124 PetriNetUnfolderBase]: 4724/7355 cut-off events. [2024-06-14 12:29:56,275 INFO L125 PetriNetUnfolderBase]: For 521961/521971 co-relation queries the response was YES. [2024-06-14 12:29:56,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59171 conditions, 7355 events. 4724/7355 cut-off events. For 521961/521971 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43146 event pairs, 1091 based on Foata normal form. 22/7376 useless extension candidates. Maximal degree in co-relation 59055. Up to 6762 conditions per place. [2024-06-14 12:29:56,372 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 376 selfloop transitions, 83 changer transitions 0/471 dead transitions. [2024-06-14 12:29:56,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 471 transitions, 7466 flow [2024-06-14 12:29:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:29:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:29:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 12:29:56,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:29:56,374 INFO L175 Difference]: Start difference. First operand has 265 places, 421 transitions, 6288 flow. Second operand 11 states and 187 transitions. [2024-06-14 12:29:56,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 471 transitions, 7466 flow [2024-06-14 12:29:57,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 471 transitions, 7420 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:57,489 INFO L231 Difference]: Finished difference. Result has 271 places, 426 transitions, 6513 flow [2024-06-14 12:29:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6513, PETRI_PLACES=271, PETRI_TRANSITIONS=426} [2024-06-14 12:29:57,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 12:29:57,490 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 426 transitions, 6513 flow [2024-06-14 12:29:57,490 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) [2024-06-14 12:29:57,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:57,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:29:57,491 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)] === [2024-06-14 12:29:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -663223570, now seen corresponding path program 2 times [2024-06-14 12:29:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142281124] [2024-06-14 12:29:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:58,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:58,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142281124] [2024-06-14 12:29:58,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142281124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:58,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:58,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127093415] [2024-06-14 12:29:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:58,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:58,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:58,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 426 transitions, 6513 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:58,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:58,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:58,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:00,381 INFO L124 PetriNetUnfolderBase]: 4917/7661 cut-off events. [2024-06-14 12:30:00,381 INFO L125 PetriNetUnfolderBase]: For 546423/546435 co-relation queries the response was YES. [2024-06-14 12:30:00,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62029 conditions, 7661 events. 4917/7661 cut-off events. For 546423/546435 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45597 event pairs, 1036 based on Foata normal form. 24/7684 useless extension candidates. Maximal degree in co-relation 61911. Up to 7126 conditions per place. [2024-06-14 12:30:00,469 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 391 selfloop transitions, 85 changer transitions 0/488 dead transitions. [2024-06-14 12:30:00,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 488 transitions, 7991 flow [2024-06-14 12:30:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:30:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:30:00,470 INFO L175 Difference]: Start difference. First operand has 271 places, 426 transitions, 6513 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:30:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 488 transitions, 7991 flow [2024-06-14 12:30:01,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 488 transitions, 7705 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:01,652 INFO L231 Difference]: Finished difference. Result has 277 places, 449 transitions, 6883 flow [2024-06-14 12:30:01,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6883, PETRI_PLACES=277, PETRI_TRANSITIONS=449} [2024-06-14 12:30:01,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 12:30:01,653 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 449 transitions, 6883 flow [2024-06-14 12:30:01,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:01,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:30:01,653 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)] === [2024-06-14 12:30:01,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash 257426606, now seen corresponding path program 3 times [2024-06-14 12:30:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065273602] [2024-06-14 12:30:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:02,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065273602] [2024-06-14 12:30:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065273602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975456730] [2024-06-14 12:30:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:02,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:02,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 449 transitions, 6883 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:02,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:02,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:04,425 INFO L124 PetriNetUnfolderBase]: 4897/7632 cut-off events. [2024-06-14 12:30:04,425 INFO L125 PetriNetUnfolderBase]: For 541346/541366 co-relation queries the response was YES. [2024-06-14 12:30:04,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61751 conditions, 7632 events. 4897/7632 cut-off events. For 541346/541366 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45325 event pairs, 1120 based on Foata normal form. 32/7663 useless extension candidates. Maximal degree in co-relation 61628. Up to 6843 conditions per place. [2024-06-14 12:30:04,527 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 348 selfloop transitions, 134 changer transitions 0/494 dead transitions. [2024-06-14 12:30:04,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 494 transitions, 8094 flow [2024-06-14 12:30:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:30:04,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 12:30:04,529 INFO L175 Difference]: Start difference. First operand has 277 places, 449 transitions, 6883 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:30:04,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 494 transitions, 8094 flow [2024-06-14 12:30:05,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 494 transitions, 8017 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-14 12:30:05,941 INFO L231 Difference]: Finished difference. Result has 286 places, 456 transitions, 7197 flow [2024-06-14 12:30:05,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7197, PETRI_PLACES=286, PETRI_TRANSITIONS=456} [2024-06-14 12:30:05,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 12:30:05,942 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 456 transitions, 7197 flow [2024-06-14 12:30:05,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:05,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:05,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:05,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:30:05,943 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:05,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 257311286, now seen corresponding path program 4 times [2024-06-14 12:30:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:05,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011633856] [2024-06-14 12:30:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011633856] [2024-06-14 12:30:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011633856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:07,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:07,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:30:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887045582] [2024-06-14 12:30:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:30:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:30:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:30:07,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:07,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 456 transitions, 7197 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) [2024-06-14 12:30:07,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:07,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:07,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:09,578 INFO L124 PetriNetUnfolderBase]: 4938/7717 cut-off events. [2024-06-14 12:30:09,578 INFO L125 PetriNetUnfolderBase]: For 567078/567080 co-relation queries the response was YES. [2024-06-14 12:30:09,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62851 conditions, 7717 events. 4938/7717 cut-off events. For 567078/567080 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46264 event pairs, 1419 based on Foata normal form. 14/7730 useless extension candidates. Maximal degree in co-relation 62725. Up to 7055 conditions per place. [2024-06-14 12:30:09,691 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 382 selfloop transitions, 112 changer transitions 0/506 dead transitions. [2024-06-14 12:30:09,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 506 transitions, 8485 flow [2024-06-14 12:30:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:30:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:30:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 12:30:09,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 12:30:09,693 INFO L175 Difference]: Start difference. First operand has 286 places, 456 transitions, 7197 flow. Second operand 11 states and 191 transitions. [2024-06-14 12:30:09,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 506 transitions, 8485 flow [2024-06-14 12:30:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 506 transitions, 8205 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:11,370 INFO L231 Difference]: Finished difference. Result has 291 places, 461 transitions, 7271 flow [2024-06-14 12:30:11,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6919, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7271, PETRI_PLACES=291, PETRI_TRANSITIONS=461} [2024-06-14 12:30:11,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:30:11,371 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 461 transitions, 7271 flow [2024-06-14 12:30:11,371 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) [2024-06-14 12:30:11,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:11,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:11,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:30:11,372 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:11,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:11,373 INFO L85 PathProgramCache]: Analyzing trace with hash 349005342, now seen corresponding path program 5 times [2024-06-14 12:30:11,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:11,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388647269] [2024-06-14 12:30:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:12,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388647269] [2024-06-14 12:30:12,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388647269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:12,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305223852] [2024-06-14 12:30:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:12,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 461 transitions, 7271 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:12,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:12,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:14,525 INFO L124 PetriNetUnfolderBase]: 5006/7819 cut-off events. [2024-06-14 12:30:14,526 INFO L125 PetriNetUnfolderBase]: For 589262/589282 co-relation queries the response was YES. [2024-06-14 12:30:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63878 conditions, 7819 events. 5006/7819 cut-off events. For 589262/589282 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46877 event pairs, 997 based on Foata normal form. 32/7850 useless extension candidates. Maximal degree in co-relation 63750. Up to 6907 conditions per place. [2024-06-14 12:30:14,612 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 386 selfloop transitions, 109 changer transitions 0/507 dead transitions. [2024-06-14 12:30:14,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 507 transitions, 8539 flow [2024-06-14 12:30:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:30:14,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:30:14,614 INFO L175 Difference]: Start difference. First operand has 291 places, 461 transitions, 7271 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:30:14,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 507 transitions, 8539 flow [2024-06-14 12:30:16,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 507 transitions, 8251 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:16,180 INFO L231 Difference]: Finished difference. Result has 294 places, 468 transitions, 7366 flow [2024-06-14 12:30:16,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7366, PETRI_PLACES=294, PETRI_TRANSITIONS=468} [2024-06-14 12:30:16,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 12:30:16,180 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 468 transitions, 7366 flow [2024-06-14 12:30:16,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:16,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:16,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:16,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:30:16,181 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:16,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1017023136, now seen corresponding path program 1 times [2024-06-14 12:30:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:16,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268087530] [2024-06-14 12:30:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:16,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268087530] [2024-06-14 12:30:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268087530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:17,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:17,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:17,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070361206] [2024-06-14 12:30:17,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:17,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:17,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:30:17,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 468 transitions, 7366 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:17,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:17,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:30:17,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:18,835 INFO L124 PetriNetUnfolderBase]: 5124/7949 cut-off events. [2024-06-14 12:30:18,835 INFO L125 PetriNetUnfolderBase]: For 591387/591403 co-relation queries the response was YES. [2024-06-14 12:30:18,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64989 conditions, 7949 events. 5124/7949 cut-off events. For 591387/591403 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 47237 event pairs, 1355 based on Foata normal form. 18/7966 useless extension candidates. Maximal degree in co-relation 64859. Up to 7630 conditions per place. [2024-06-14 12:30:18,931 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 395 selfloop transitions, 107 changer transitions 0/505 dead transitions. [2024-06-14 12:30:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 505 transitions, 8850 flow [2024-06-14 12:30:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:30:18,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:30:18,932 INFO L175 Difference]: Start difference. First operand has 294 places, 468 transitions, 7366 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:30:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 505 transitions, 8850 flow [2024-06-14 12:30:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 505 transitions, 8614 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:20,732 INFO L231 Difference]: Finished difference. Result has 298 places, 477 transitions, 7517 flow [2024-06-14 12:30:20,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7134, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7517, PETRI_PLACES=298, PETRI_TRANSITIONS=477} [2024-06-14 12:30:20,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 12:30:20,733 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 477 transitions, 7517 flow [2024-06-14 12:30:20,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:20,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:20,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:20,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:30:20,733 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:20,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2019498124, now seen corresponding path program 6 times [2024-06-14 12:30:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:20,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131132471] [2024-06-14 12:30:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:22,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131132471] [2024-06-14 12:30:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131132471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:22,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:22,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:30:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965665032] [2024-06-14 12:30:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:22,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:30:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:30:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:30:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:22,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 477 transitions, 7517 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) [2024-06-14 12:30:22,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:24,434 INFO L124 PetriNetUnfolderBase]: 5096/7963 cut-off events. [2024-06-14 12:30:24,434 INFO L125 PetriNetUnfolderBase]: For 601110/601126 co-relation queries the response was YES. [2024-06-14 12:30:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65306 conditions, 7963 events. 5096/7963 cut-off events. For 601110/601126 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 47942 event pairs, 1202 based on Foata normal form. 28/7990 useless extension candidates. Maximal degree in co-relation 65174. Up to 7287 conditions per place. [2024-06-14 12:30:24,540 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 399 selfloop transitions, 112 changer transitions 0/526 dead transitions. [2024-06-14 12:30:24,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 526 transitions, 8834 flow [2024-06-14 12:30:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:30:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:30:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 12:30:24,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059196617336152 [2024-06-14 12:30:24,542 INFO L175 Difference]: Start difference. First operand has 298 places, 477 transitions, 7517 flow. Second operand 11 states and 192 transitions. [2024-06-14 12:30:24,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 526 transitions, 8834 flow [2024-06-14 12:30:26,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 526 transitions, 8735 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:26,222 INFO L231 Difference]: Finished difference. Result has 306 places, 483 transitions, 7787 flow [2024-06-14 12:30:26,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7787, PETRI_PLACES=306, PETRI_TRANSITIONS=483} [2024-06-14 12:30:26,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 12:30:26,223 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 483 transitions, 7787 flow [2024-06-14 12:30:26,223 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) [2024-06-14 12:30:26,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:26,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:30:26,223 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:26,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -10309163, now seen corresponding path program 1 times [2024-06-14 12:30:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:26,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069016033] [2024-06-14 12:30:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:26,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069016033] [2024-06-14 12:30:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069016033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:26,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552565641] [2024-06-14 12:30:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:26,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:27,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:27,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 483 transitions, 7787 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) [2024-06-14 12:30:27,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:27,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:28,616 INFO L124 PetriNetUnfolderBase]: 5109/7987 cut-off events. [2024-06-14 12:30:28,617 INFO L125 PetriNetUnfolderBase]: For 611715/611717 co-relation queries the response was YES. [2024-06-14 12:30:28,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66078 conditions, 7987 events. 5109/7987 cut-off events. For 611715/611717 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 48266 event pairs, 1689 based on Foata normal form. 3/7989 useless extension candidates. Maximal degree in co-relation 65943. Up to 7764 conditions per place. [2024-06-14 12:30:28,723 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 461 selfloop transitions, 35 changer transitions 0/511 dead transitions. [2024-06-14 12:30:28,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 511 transitions, 9089 flow [2024-06-14 12:30:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:30:28,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:30:28,724 INFO L175 Difference]: Start difference. First operand has 306 places, 483 transitions, 7787 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:30:28,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 511 transitions, 9089 flow [2024-06-14 12:30:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 511 transitions, 8828 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:30,389 INFO L231 Difference]: Finished difference. Result has 307 places, 489 transitions, 7708 flow [2024-06-14 12:30:30,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7526, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=307, PETRI_TRANSITIONS=489} [2024-06-14 12:30:30,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 12:30:30,390 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 489 transitions, 7708 flow [2024-06-14 12:30:30,390 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) [2024-06-14 12:30:30,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:30:30,391 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)] === [2024-06-14 12:30:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1764385176, now seen corresponding path program 7 times [2024-06-14 12:30:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:30,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485308907] [2024-06-14 12:30:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:31,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:31,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485308907] [2024-06-14 12:30:31,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485308907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:31,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:31,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:30:31,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577760162] [2024-06-14 12:30:31,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:31,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:30:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:30:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:30:32,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:32,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 489 transitions, 7708 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) [2024-06-14 12:30:32,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:32,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:32,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:33,959 INFO L124 PetriNetUnfolderBase]: 5150/8050 cut-off events. [2024-06-14 12:30:33,959 INFO L125 PetriNetUnfolderBase]: For 643335/643355 co-relation queries the response was YES. [2024-06-14 12:30:34,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66577 conditions, 8050 events. 5150/8050 cut-off events. For 643335/643355 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48552 event pairs, 1227 based on Foata normal form. 32/8081 useless extension candidates. Maximal degree in co-relation 66441. Up to 7339 conditions per place. [2024-06-14 12:30:34,051 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 393 selfloop transitions, 128 changer transitions 0/536 dead transitions. [2024-06-14 12:30:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 536 transitions, 9052 flow [2024-06-14 12:30:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:30:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:30:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 12:30:34,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-14 12:30:34,053 INFO L175 Difference]: Start difference. First operand has 307 places, 489 transitions, 7708 flow. Second operand 11 states and 193 transitions. [2024-06-14 12:30:34,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 536 transitions, 9052 flow [2024-06-14 12:30:35,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 536 transitions, 8950 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:35,931 INFO L231 Difference]: Finished difference. Result has 315 places, 492 transitions, 7974 flow [2024-06-14 12:30:35,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7606, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7974, PETRI_PLACES=315, PETRI_TRANSITIONS=492} [2024-06-14 12:30:35,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 12:30:35,932 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 492 transitions, 7974 flow [2024-06-14 12:30:35,932 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) [2024-06-14 12:30:35,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:35,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:30:35,933 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:35,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1981985403, now seen corresponding path program 2 times [2024-06-14 12:30:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058371298] [2024-06-14 12:30:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:36,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:36,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058371298] [2024-06-14 12:30:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058371298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:36,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:36,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:36,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972323545] [2024-06-14 12:30:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:36,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:36,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:36,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 492 transitions, 7974 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) [2024-06-14 12:30:36,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:36,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:38,655 INFO L124 PetriNetUnfolderBase]: 5147/8054 cut-off events. [2024-06-14 12:30:38,655 INFO L125 PetriNetUnfolderBase]: For 650147/650149 co-relation queries the response was YES. [2024-06-14 12:30:38,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67389 conditions, 8054 events. 5147/8054 cut-off events. For 650147/650149 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48774 event pairs, 1708 based on Foata normal form. 3/8056 useless extension candidates. Maximal degree in co-relation 67250. Up to 7847 conditions per place. [2024-06-14 12:30:38,756 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 464 selfloop transitions, 31 changer transitions 0/510 dead transitions. [2024-06-14 12:30:38,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 510 transitions, 9032 flow [2024-06-14 12:30:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:30:38,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:30:38,758 INFO L175 Difference]: Start difference. First operand has 315 places, 492 transitions, 7974 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:30:38,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 510 transitions, 9032 flow [2024-06-14 12:30:40,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 510 transitions, 8680 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:40,725 INFO L231 Difference]: Finished difference. Result has 317 places, 492 transitions, 7690 flow [2024-06-14 12:30:40,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7622, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7690, PETRI_PLACES=317, PETRI_TRANSITIONS=492} [2024-06-14 12:30:40,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:30:40,731 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 492 transitions, 7690 flow [2024-06-14 12:30:40,732 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) [2024-06-14 12:30:40,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:40,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:30:40,732 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash -13853300, now seen corresponding path program 2 times [2024-06-14 12:30:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153852828] [2024-06-14 12:30:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:41,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153852828] [2024-06-14 12:30:41,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153852828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:41,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633090330] [2024-06-14 12:30:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:41,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:30:41,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 492 transitions, 7690 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:41,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:41,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:30:41,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:43,721 INFO L124 PetriNetUnfolderBase]: 5287/8207 cut-off events. [2024-06-14 12:30:43,722 INFO L125 PetriNetUnfolderBase]: For 666573/666589 co-relation queries the response was YES. [2024-06-14 12:30:43,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67977 conditions, 8207 events. 5287/8207 cut-off events. For 666573/666589 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 49096 event pairs, 1325 based on Foata normal form. 18/8224 useless extension candidates. Maximal degree in co-relation 67837. Up to 7875 conditions per place. [2024-06-14 12:30:43,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 421 selfloop transitions, 116 changer transitions 0/540 dead transitions. [2024-06-14 12:30:43,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 540 transitions, 9511 flow [2024-06-14 12:30:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:30:43,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:30:43,842 INFO L175 Difference]: Start difference. First operand has 317 places, 492 transitions, 7690 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:30:43,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 540 transitions, 9511 flow [2024-06-14 12:30:45,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 540 transitions, 9447 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:45,421 INFO L231 Difference]: Finished difference. Result has 320 places, 508 transitions, 8086 flow [2024-06-14 12:30:45,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8086, PETRI_PLACES=320, PETRI_TRANSITIONS=508} [2024-06-14 12:30:45,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 12:30:45,422 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 508 transitions, 8086 flow [2024-06-14 12:30:45,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:45,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:45,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:45,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:30:45,423 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:45,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 482495543, now seen corresponding path program 1 times [2024-06-14 12:30:45,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:45,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132881648] [2024-06-14 12:30:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132881648] [2024-06-14 12:30:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132881648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:46,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:46,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071648412] [2024-06-14 12:30:46,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:46,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:30:46,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 508 transitions, 8086 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:46,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:46,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:30:46,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:48,393 INFO L124 PetriNetUnfolderBase]: 5292/8218 cut-off events. [2024-06-14 12:30:48,394 INFO L125 PetriNetUnfolderBase]: For 683808/683810 co-relation queries the response was YES. [2024-06-14 12:30:48,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68560 conditions, 8218 events. 5292/8218 cut-off events. For 683808/683810 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49253 event pairs, 1765 based on Foata normal form. 3/8220 useless extension candidates. Maximal degree in co-relation 68419. Up to 8102 conditions per place. [2024-06-14 12:30:48,513 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 489 selfloop transitions, 45 changer transitions 0/537 dead transitions. [2024-06-14 12:30:48,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 537 transitions, 9458 flow [2024-06-14 12:30:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:30:48,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 12:30:48,521 INFO L175 Difference]: Start difference. First operand has 320 places, 508 transitions, 8086 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:30:48,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 537 transitions, 9458 flow [2024-06-14 12:30:50,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 537 transitions, 9281 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:50,644 INFO L231 Difference]: Finished difference. Result has 326 places, 517 transitions, 8128 flow [2024-06-14 12:30:50,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=326, PETRI_TRANSITIONS=517} [2024-06-14 12:30:50,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:30:50,645 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 517 transitions, 8128 flow [2024-06-14 12:30:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:50,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:50,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:30:50,646 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:50,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash 466396840, now seen corresponding path program 3 times [2024-06-14 12:30:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:50,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176552753] [2024-06-14 12:30:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:51,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176552753] [2024-06-14 12:30:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176552753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:51,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:51,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125187503] [2024-06-14 12:30:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:51,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:51,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:30:51,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 517 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:51,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:51,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:30:51,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:53,688 INFO L124 PetriNetUnfolderBase]: 5302/8224 cut-off events. [2024-06-14 12:30:53,688 INFO L125 PetriNetUnfolderBase]: For 705589/705609 co-relation queries the response was YES. [2024-06-14 12:30:53,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69035 conditions, 8224 events. 5302/8224 cut-off events. For 705589/705609 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49132 event pairs, 1276 based on Foata normal form. 22/8245 useless extension candidates. Maximal degree in co-relation 68892. Up to 7892 conditions per place. [2024-06-14 12:30:53,814 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 420 selfloop transitions, 127 changer transitions 0/550 dead transitions. [2024-06-14 12:30:53,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 550 transitions, 9824 flow [2024-06-14 12:30:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:30:53,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:30:53,816 INFO L175 Difference]: Start difference. First operand has 326 places, 517 transitions, 8128 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:30:53,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 550 transitions, 9824 flow [2024-06-14 12:30:55,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 550 transitions, 9765 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:55,670 INFO L231 Difference]: Finished difference. Result has 331 places, 522 transitions, 8407 flow [2024-06-14 12:30:55,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8407, PETRI_PLACES=331, PETRI_TRANSITIONS=522} [2024-06-14 12:30:55,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 12:30:55,672 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 522 transitions, 8407 flow [2024-06-14 12:30:55,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:55,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:55,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:30:55,673 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:55,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash -858380644, now seen corresponding path program 4 times [2024-06-14 12:30:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:55,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206239589] [2024-06-14 12:30:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:56,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206239589] [2024-06-14 12:30:56,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206239589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865930969] [2024-06-14 12:30:56,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:56,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:30:56,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 522 transitions, 8407 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:56,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:30:56,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:58,584 INFO L124 PetriNetUnfolderBase]: 5296/8216 cut-off events. [2024-06-14 12:30:58,584 INFO L125 PetriNetUnfolderBase]: For 720775/720795 co-relation queries the response was YES. [2024-06-14 12:30:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69412 conditions, 8216 events. 5296/8216 cut-off events. For 720775/720795 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 49068 event pairs, 1275 based on Foata normal form. 22/8237 useless extension candidates. Maximal degree in co-relation 69266. Up to 7887 conditions per place. [2024-06-14 12:30:58,710 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 413 selfloop transitions, 132 changer transitions 0/548 dead transitions. [2024-06-14 12:30:58,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 548 transitions, 9883 flow [2024-06-14 12:30:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:30:58,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:30:58,713 INFO L175 Difference]: Start difference. First operand has 331 places, 522 transitions, 8407 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:30:58,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 548 transitions, 9883 flow [2024-06-14 12:31:00,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 548 transitions, 9602 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:00,935 INFO L231 Difference]: Finished difference. Result has 335 places, 522 transitions, 8398 flow [2024-06-14 12:31:00,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8126, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8398, PETRI_PLACES=335, PETRI_TRANSITIONS=522} [2024-06-14 12:31:00,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 12:31:00,937 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 522 transitions, 8398 flow [2024-06-14 12:31:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:00,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:31:00,938 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:00,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash -723765890, now seen corresponding path program 8 times [2024-06-14 12:31:00,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:00,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146527932] [2024-06-14 12:31:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146527932] [2024-06-14 12:31:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146527932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:31:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016250238] [2024-06-14 12:31:02,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:02,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:31:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:31:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:31:02,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:02,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 522 transitions, 8398 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) [2024-06-14 12:31:02,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:02,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:02,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:04,909 INFO L124 PetriNetUnfolderBase]: 5240/8192 cut-off events. [2024-06-14 12:31:04,909 INFO L125 PetriNetUnfolderBase]: For 759360/759376 co-relation queries the response was YES. [2024-06-14 12:31:04,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69594 conditions, 8192 events. 5240/8192 cut-off events. For 759360/759376 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 49473 event pairs, 1173 based on Foata normal form. 28/8219 useless extension candidates. Maximal degree in co-relation 69447. Up to 6979 conditions per place. [2024-06-14 12:31:05,017 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 121 changer transitions 0/565 dead transitions. [2024-06-14 12:31:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 565 transitions, 9746 flow [2024-06-14 12:31:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:31:05,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 12:31:05,019 INFO L175 Difference]: Start difference. First operand has 335 places, 522 transitions, 8398 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:31:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 565 transitions, 9746 flow [2024-06-14 12:31:07,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 565 transitions, 9494 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:07,403 INFO L231 Difference]: Finished difference. Result has 339 places, 525 transitions, 8528 flow [2024-06-14 12:31:07,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8528, PETRI_PLACES=339, PETRI_TRANSITIONS=525} [2024-06-14 12:31:07,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-14 12:31:07,404 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 525 transitions, 8528 flow [2024-06-14 12:31:07,405 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) [2024-06-14 12:31:07,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:07,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:31:07,405 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1456126284, now seen corresponding path program 9 times [2024-06-14 12:31:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362533500] [2024-06-14 12:31:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362533500] [2024-06-14 12:31:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362533500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:09,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:09,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:31:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203810384] [2024-06-14 12:31:09,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:31:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:31:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:31:09,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:09,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 525 transitions, 8528 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) [2024-06-14 12:31:09,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:09,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:09,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:11,501 INFO L124 PetriNetUnfolderBase]: 5322/8350 cut-off events. [2024-06-14 12:31:11,502 INFO L125 PetriNetUnfolderBase]: For 782657/782659 co-relation queries the response was YES. [2024-06-14 12:31:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71357 conditions, 8350 events. 5322/8350 cut-off events. For 782657/782659 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51167 event pairs, 1563 based on Foata normal form. 14/8363 useless extension candidates. Maximal degree in co-relation 71208. Up to 7464 conditions per place. [2024-06-14 12:31:11,619 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 135 changer transitions 0/570 dead transitions. [2024-06-14 12:31:11,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 570 transitions, 9906 flow [2024-06-14 12:31:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:31:11,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:31:11,621 INFO L175 Difference]: Start difference. First operand has 339 places, 525 transitions, 8528 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:31:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 570 transitions, 9906 flow [2024-06-14 12:31:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 570 transitions, 9612 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:14,429 INFO L231 Difference]: Finished difference. Result has 344 places, 530 transitions, 8690 flow [2024-06-14 12:31:14,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8234, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8690, PETRI_PLACES=344, PETRI_TRANSITIONS=530} [2024-06-14 12:31:14,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 12:31:14,430 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 530 transitions, 8690 flow [2024-06-14 12:31:14,430 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) [2024-06-14 12:31:14,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:14,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:14,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:31:14,430 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)] === [2024-06-14 12:31:14,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1964985012, now seen corresponding path program 10 times [2024-06-14 12:31:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:14,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143743465] [2024-06-14 12:31:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:14,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143743465] [2024-06-14 12:31:16,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143743465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:16,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:16,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:31:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721368431] [2024-06-14 12:31:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:31:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:31:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:31:16,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:16,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 530 transitions, 8690 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) [2024-06-14 12:31:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:18,325 INFO L124 PetriNetUnfolderBase]: 5363/8417 cut-off events. [2024-06-14 12:31:18,326 INFO L125 PetriNetUnfolderBase]: For 760391/760393 co-relation queries the response was YES. [2024-06-14 12:31:18,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71339 conditions, 8417 events. 5363/8417 cut-off events. For 760391/760393 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51650 event pairs, 1504 based on Foata normal form. 14/8430 useless extension candidates. Maximal degree in co-relation 71187. Up to 7227 conditions per place. [2024-06-14 12:31:18,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 393 selfloop transitions, 157 changer transitions 0/573 dead transitions. [2024-06-14 12:31:18,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 573 transitions, 10056 flow [2024-06-14 12:31:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:31:18,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 12:31:18,442 INFO L175 Difference]: Start difference. First operand has 344 places, 530 transitions, 8690 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:31:18,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 573 transitions, 10056 flow [2024-06-14 12:31:20,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 573 transitions, 9854 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:20,624 INFO L231 Difference]: Finished difference. Result has 350 places, 533 transitions, 8952 flow [2024-06-14 12:31:20,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8488, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8952, PETRI_PLACES=350, PETRI_TRANSITIONS=533} [2024-06-14 12:31:20,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 12:31:20,625 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 533 transitions, 8952 flow [2024-06-14 12:31:20,625 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) [2024-06-14 12:31:20,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:20,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:31:20,625 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:20,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash -519767951, now seen corresponding path program 3 times [2024-06-14 12:31:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915064592] [2024-06-14 12:31:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915064592] [2024-06-14 12:31:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915064592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:21,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257201388] [2024-06-14 12:31:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:21,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:21,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:21,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:21,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 533 transitions, 8952 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) [2024-06-14 12:31:21,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:21,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:21,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:23,383 INFO L124 PetriNetUnfolderBase]: 5376/8429 cut-off events. [2024-06-14 12:31:23,383 INFO L125 PetriNetUnfolderBase]: For 769709/769711 co-relation queries the response was YES. [2024-06-14 12:31:23,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72228 conditions, 8429 events. 5376/8429 cut-off events. For 769709/769711 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51702 event pairs, 1772 based on Foata normal form. 3/8431 useless extension candidates. Maximal degree in co-relation 72074. Up to 8170 conditions per place. [2024-06-14 12:31:23,512 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 492 selfloop transitions, 42 changer transitions 0/557 dead transitions. [2024-06-14 12:31:23,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 557 transitions, 10354 flow [2024-06-14 12:31:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:31:23,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:31:23,513 INFO L175 Difference]: Start difference. First operand has 350 places, 533 transitions, 8952 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:31:23,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 557 transitions, 10354 flow [2024-06-14 12:31:25,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 557 transitions, 9996 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:25,880 INFO L231 Difference]: Finished difference. Result has 350 places, 539 transitions, 8818 flow [2024-06-14 12:31:25,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8818, PETRI_PLACES=350, PETRI_TRANSITIONS=539} [2024-06-14 12:31:25,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 12:31:25,881 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 539 transitions, 8818 flow [2024-06-14 12:31:25,881 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) [2024-06-14 12:31:25,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:25,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:31:25,882 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:25,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash -514054031, now seen corresponding path program 4 times [2024-06-14 12:31:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:25,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824953739] [2024-06-14 12:31:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:26,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824953739] [2024-06-14 12:31:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824953739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:26,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795951108] [2024-06-14 12:31:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:26,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:26,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 539 transitions, 8818 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) [2024-06-14 12:31:26,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:26,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:26,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:28,693 INFO L124 PetriNetUnfolderBase]: 5381/8436 cut-off events. [2024-06-14 12:31:28,693 INFO L125 PetriNetUnfolderBase]: For 740507/740509 co-relation queries the response was YES. [2024-06-14 12:31:28,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71202 conditions, 8436 events. 5381/8436 cut-off events. For 740507/740509 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51752 event pairs, 1766 based on Foata normal form. 3/8438 useless extension candidates. Maximal degree in co-relation 71048. Up to 8207 conditions per place. [2024-06-14 12:31:28,840 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 500 selfloop transitions, 33 changer transitions 0/556 dead transitions. [2024-06-14 12:31:28,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 556 transitions, 10002 flow [2024-06-14 12:31:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:31:28,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:31:28,841 INFO L175 Difference]: Start difference. First operand has 350 places, 539 transitions, 8818 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:31:28,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 556 transitions, 10002 flow [2024-06-14 12:31:31,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 556 transitions, 9872 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:31,607 INFO L231 Difference]: Finished difference. Result has 353 places, 542 transitions, 8832 flow [2024-06-14 12:31:31,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8714, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8832, PETRI_PLACES=353, PETRI_TRANSITIONS=542} [2024-06-14 12:31:31,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-14 12:31:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 542 transitions, 8832 flow [2024-06-14 12:31:31,608 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) [2024-06-14 12:31:31,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:31,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:31,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:31:31,609 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)] === [2024-06-14 12:31:31,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2075328206, now seen corresponding path program 11 times [2024-06-14 12:31:31,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:31,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812867806] [2024-06-14 12:31:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:31,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812867806] [2024-06-14 12:31:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812867806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:32,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196067221] [2024-06-14 12:31:32,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:32,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:32,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 542 transitions, 8832 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:32,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:32,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:32,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:35,240 INFO L124 PetriNetUnfolderBase]: 5361/8396 cut-off events. [2024-06-14 12:31:35,240 INFO L125 PetriNetUnfolderBase]: For 735843/735863 co-relation queries the response was YES. [2024-06-14 12:31:35,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70288 conditions, 8396 events. 5361/8396 cut-off events. For 735843/735863 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51220 event pairs, 1198 based on Foata normal form. 32/8427 useless extension candidates. Maximal degree in co-relation 70133. Up to 7223 conditions per place. [2024-06-14 12:31:35,364 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 398 selfloop transitions, 157 changer transitions 0/578 dead transitions. [2024-06-14 12:31:35,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 578 transitions, 10136 flow [2024-06-14 12:31:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:31:35,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:31:35,366 INFO L175 Difference]: Start difference. First operand has 353 places, 542 transitions, 8832 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:31:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 578 transitions, 10136 flow [2024-06-14 12:31:37,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 578 transitions, 10036 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:37,773 INFO L231 Difference]: Finished difference. Result has 357 places, 544 transitions, 9130 flow [2024-06-14 12:31:37,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9130, PETRI_PLACES=357, PETRI_TRANSITIONS=544} [2024-06-14 12:31:37,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-14 12:31:37,774 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 544 transitions, 9130 flow [2024-06-14 12:31:37,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:37,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:37,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:37,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:31:37,775 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)] === [2024-06-14 12:31:37,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2075212886, now seen corresponding path program 12 times [2024-06-14 12:31:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516276196] [2024-06-14 12:31:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:39,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516276196] [2024-06-14 12:31:39,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516276196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:39,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:39,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:31:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125366951] [2024-06-14 12:31:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:31:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:31:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:31:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 544 transitions, 9130 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) [2024-06-14 12:31:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:41,454 INFO L124 PetriNetUnfolderBase]: 5402/8467 cut-off events. [2024-06-14 12:31:41,454 INFO L125 PetriNetUnfolderBase]: For 745456/745476 co-relation queries the response was YES. [2024-06-14 12:31:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71524 conditions, 8467 events. 5402/8467 cut-off events. For 745456/745476 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51829 event pairs, 1232 based on Foata normal form. 32/8498 useless extension candidates. Maximal degree in co-relation 71368. Up to 7074 conditions per place. [2024-06-14 12:31:41,583 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 412 selfloop transitions, 155 changer transitions 0/590 dead transitions. [2024-06-14 12:31:41,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 590 transitions, 10572 flow [2024-06-14 12:31:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:31:41,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:31:41,585 INFO L175 Difference]: Start difference. First operand has 357 places, 544 transitions, 9130 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:31:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 590 transitions, 10572 flow [2024-06-14 12:31:44,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 590 transitions, 10244 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:44,092 INFO L231 Difference]: Finished difference. Result has 361 places, 547 transitions, 9236 flow [2024-06-14 12:31:44,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8802, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9236, PETRI_PLACES=361, PETRI_TRANSITIONS=547} [2024-06-14 12:31:44,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 12:31:44,093 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 547 transitions, 9236 flow [2024-06-14 12:31:44,093 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) [2024-06-14 12:31:44,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:44,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:44,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:31:44,094 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:44,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:44,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1979439380, now seen corresponding path program 5 times [2024-06-14 12:31:44,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:44,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862653200] [2024-06-14 12:31:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:44,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:44,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862653200] [2024-06-14 12:31:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862653200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:44,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:44,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:44,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793248579] [2024-06-14 12:31:44,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:44,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:45,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:31:45,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 547 transitions, 9236 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:45,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:45,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:31:45,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:47,340 INFO L124 PetriNetUnfolderBase]: 5506/8590 cut-off events. [2024-06-14 12:31:47,341 INFO L125 PetriNetUnfolderBase]: For 715560/715562 co-relation queries the response was YES. [2024-06-14 12:31:47,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71991 conditions, 8590 events. 5506/8590 cut-off events. For 715560/715562 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52411 event pairs, 1760 based on Foata normal form. 5/8594 useless extension candidates. Maximal degree in co-relation 71834. Up to 8242 conditions per place. [2024-06-14 12:31:47,448 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 140 changer transitions 0/577 dead transitions. [2024-06-14 12:31:47,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 577 transitions, 10723 flow [2024-06-14 12:31:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:31:47,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:31:47,449 INFO L175 Difference]: Start difference. First operand has 361 places, 547 transitions, 9236 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:31:47,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 577 transitions, 10723 flow [2024-06-14 12:31:49,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 577 transitions, 10303 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:49,745 INFO L231 Difference]: Finished difference. Result has 362 places, 552 transitions, 9212 flow [2024-06-14 12:31:49,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8818, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9212, PETRI_PLACES=362, PETRI_TRANSITIONS=552} [2024-06-14 12:31:49,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 12:31:49,746 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 552 transitions, 9212 flow [2024-06-14 12:31:49,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:49,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:49,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:49,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:31:49,746 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:49,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1970184950, now seen corresponding path program 6 times [2024-06-14 12:31:49,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:49,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788542813] [2024-06-14 12:31:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788542813] [2024-06-14 12:31:50,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788542813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:50,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:50,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:50,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434849374] [2024-06-14 12:31:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:50,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:50,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:31:50,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 552 transitions, 9212 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:50,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:50,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:31:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:53,366 INFO L124 PetriNetUnfolderBase]: 5532/8610 cut-off events. [2024-06-14 12:31:53,367 INFO L125 PetriNetUnfolderBase]: For 708012/708032 co-relation queries the response was YES. [2024-06-14 12:31:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71569 conditions, 8610 events. 5532/8610 cut-off events. For 708012/708032 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52203 event pairs, 1333 based on Foata normal form. 22/8631 useless extension candidates. Maximal degree in co-relation 71411. Up to 8267 conditions per place. [2024-06-14 12:31:53,484 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 143 changer transitions 0/585 dead transitions. [2024-06-14 12:31:53,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 585 transitions, 10953 flow [2024-06-14 12:31:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:31:53,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:31:53,485 INFO L175 Difference]: Start difference. First operand has 362 places, 552 transitions, 9212 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:31:53,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 585 transitions, 10953 flow [2024-06-14 12:31:55,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 585 transitions, 10660 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:55,457 INFO L231 Difference]: Finished difference. Result has 363 places, 562 transitions, 9421 flow [2024-06-14 12:31:55,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8949, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9421, PETRI_PLACES=363, PETRI_TRANSITIONS=562} [2024-06-14 12:31:55,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:31:55,458 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 562 transitions, 9421 flow [2024-06-14 12:31:55,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:55,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:55,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:31:55,459 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:55,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash -514046095, now seen corresponding path program 2 times [2024-06-14 12:31:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665053013] [2024-06-14 12:31:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:56,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665053013] [2024-06-14 12:31:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665053013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120677651] [2024-06-14 12:31:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:56,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:31:56,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 562 transitions, 9421 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:56,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:56,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:31:56,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:58,589 INFO L124 PetriNetUnfolderBase]: 5537/8625 cut-off events. [2024-06-14 12:31:58,590 INFO L125 PetriNetUnfolderBase]: For 690406/690408 co-relation queries the response was YES. [2024-06-14 12:31:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71295 conditions, 8625 events. 5537/8625 cut-off events. For 690406/690408 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52486 event pairs, 1822 based on Foata normal form. 3/8627 useless extension candidates. Maximal degree in co-relation 71138. Up to 8508 conditions per place. [2024-06-14 12:31:58,707 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 529 selfloop transitions, 49 changer transitions 0/581 dead transitions. [2024-06-14 12:31:58,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 581 transitions, 10821 flow [2024-06-14 12:31:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:31:58,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:31:58,717 INFO L175 Difference]: Start difference. First operand has 363 places, 562 transitions, 9421 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:31:58,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 581 transitions, 10821 flow [2024-06-14 12:32:00,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 581 transitions, 10578 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:00,581 INFO L231 Difference]: Finished difference. Result has 366 places, 565 transitions, 9340 flow [2024-06-14 12:32:00,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9180, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9340, PETRI_PLACES=366, PETRI_TRANSITIONS=565} [2024-06-14 12:32:00,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 12:32:00,582 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 565 transitions, 9340 flow [2024-06-14 12:32:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:00,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:00,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:00,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:32:00,583 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -514046498, now seen corresponding path program 7 times [2024-06-14 12:32:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038616922] [2024-06-14 12:32:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:01,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:01,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038616922] [2024-06-14 12:32:01,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038616922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:01,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:01,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654064630] [2024-06-14 12:32:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:01,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:32:01,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 565 transitions, 9340 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:01,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:01,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:32:01,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:03,658 INFO L124 PetriNetUnfolderBase]: 5531/8609 cut-off events. [2024-06-14 12:32:03,659 INFO L125 PetriNetUnfolderBase]: For 687850/687870 co-relation queries the response was YES. [2024-06-14 12:32:03,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70834 conditions, 8609 events. 5531/8609 cut-off events. For 687850/687870 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 52206 event pairs, 1332 based on Foata normal form. 22/8630 useless extension candidates. Maximal degree in co-relation 70677. Up to 8269 conditions per place. [2024-06-14 12:32:03,778 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 150 changer transitions 0/586 dead transitions. [2024-06-14 12:32:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 586 transitions, 10742 flow [2024-06-14 12:32:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:32:03,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:32:03,788 INFO L175 Difference]: Start difference. First operand has 366 places, 565 transitions, 9340 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:32:03,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 586 transitions, 10742 flow [2024-06-14 12:32:05,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 586 transitions, 10588 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:05,813 INFO L231 Difference]: Finished difference. Result has 368 places, 565 transitions, 9502 flow [2024-06-14 12:32:05,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9188, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9502, PETRI_PLACES=368, PETRI_TRANSITIONS=565} [2024-06-14 12:32:05,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 12:32:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 565 transitions, 9502 flow [2024-06-14 12:32:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:05,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:32:05,815 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)] === [2024-06-14 12:32:05,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2143849869, now seen corresponding path program 5 times [2024-06-14 12:32:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120818827] [2024-06-14 12:32:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120818827] [2024-06-14 12:32:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120818827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:06,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408185756] [2024-06-14 12:32:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:06,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 565 transitions, 9502 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) [2024-06-14 12:32:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:08,620 INFO L124 PetriNetUnfolderBase]: 5438/8531 cut-off events. [2024-06-14 12:32:08,620 INFO L125 PetriNetUnfolderBase]: For 691029/691035 co-relation queries the response was YES. [2024-06-14 12:32:08,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70523 conditions, 8531 events. 5438/8531 cut-off events. For 691029/691035 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52510 event pairs, 1774 based on Foata normal form. 7/8536 useless extension candidates. Maximal degree in co-relation 70366. Up to 8222 conditions per place. [2024-06-14 12:32:08,742 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 502 selfloop transitions, 57 changer transitions 0/588 dead transitions. [2024-06-14 12:32:08,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 588 transitions, 11080 flow [2024-06-14 12:32:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:32:08,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:32:08,744 INFO L175 Difference]: Start difference. First operand has 368 places, 565 transitions, 9502 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:32:08,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 588 transitions, 11080 flow [2024-06-14 12:32:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 588 transitions, 10750 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:11,046 INFO L231 Difference]: Finished difference. Result has 367 places, 571 transitions, 9426 flow [2024-06-14 12:32:11,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9176, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9426, PETRI_PLACES=367, PETRI_TRANSITIONS=571} [2024-06-14 12:32:11,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 12:32:11,047 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 571 transitions, 9426 flow [2024-06-14 12:32:11,047 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) [2024-06-14 12:32:11,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:11,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:32:11,047 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)] === [2024-06-14 12:32:11,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 687769713, now seen corresponding path program 6 times [2024-06-14 12:32:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:11,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895570705] [2024-06-14 12:32:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:11,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895570705] [2024-06-14 12:32:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895570705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:11,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:11,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347506543] [2024-06-14 12:32:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:11,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 571 transitions, 9426 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) [2024-06-14 12:32:11,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:11,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:13,797 INFO L124 PetriNetUnfolderBase]: 5443/8538 cut-off events. [2024-06-14 12:32:13,797 INFO L125 PetriNetUnfolderBase]: For 692010/692016 co-relation queries the response was YES. [2024-06-14 12:32:13,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70689 conditions, 8538 events. 5443/8538 cut-off events. For 692010/692016 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52577 event pairs, 1775 based on Foata normal form. 7/8543 useless extension candidates. Maximal degree in co-relation 70532. Up to 8228 conditions per place. [2024-06-14 12:32:13,921 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 497 selfloop transitions, 61 changer transitions 0/587 dead transitions. [2024-06-14 12:32:13,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 587 transitions, 10794 flow [2024-06-14 12:32:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:32:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:32:13,922 INFO L175 Difference]: Start difference. First operand has 367 places, 571 transitions, 9426 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:32:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 587 transitions, 10794 flow [2024-06-14 12:32:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 587 transitions, 10570 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:16,403 INFO L231 Difference]: Finished difference. Result has 370 places, 574 transitions, 9398 flow [2024-06-14 12:32:16,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9398, PETRI_PLACES=370, PETRI_TRANSITIONS=574} [2024-06-14 12:32:16,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 12:32:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 574 transitions, 9398 flow [2024-06-14 12:32:16,404 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) [2024-06-14 12:32:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:16,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:32:16,405 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)] === [2024-06-14 12:32:16,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1819063123, now seen corresponding path program 7 times [2024-06-14 12:32:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:16,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105700878] [2024-06-14 12:32:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105700878] [2024-06-14 12:32:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105700878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:17,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109082816] [2024-06-14 12:32:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:17,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:17,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 574 transitions, 9398 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) [2024-06-14 12:32:17,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:17,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:17,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:19,182 INFO L124 PetriNetUnfolderBase]: 5440/8530 cut-off events. [2024-06-14 12:32:19,182 INFO L125 PetriNetUnfolderBase]: For 702530/702536 co-relation queries the response was YES. [2024-06-14 12:32:19,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70433 conditions, 8530 events. 5440/8530 cut-off events. For 702530/702536 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 52388 event pairs, 1776 based on Foata normal form. 7/8535 useless extension candidates. Maximal degree in co-relation 70275. Up to 8279 conditions per place. [2024-06-14 12:32:19,309 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 515 selfloop transitions, 40 changer transitions 0/584 dead transitions. [2024-06-14 12:32:19,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 584 transitions, 10676 flow [2024-06-14 12:32:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:32:19,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:32:19,311 INFO L175 Difference]: Start difference. First operand has 370 places, 574 transitions, 9398 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:32:19,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 584 transitions, 10676 flow [2024-06-14 12:32:21,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 584 transitions, 10559 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:21,444 INFO L231 Difference]: Finished difference. Result has 373 places, 574 transitions, 9367 flow [2024-06-14 12:32:21,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9281, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9367, PETRI_PLACES=373, PETRI_TRANSITIONS=574} [2024-06-14 12:32:21,447 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 12:32:21,447 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 574 transitions, 9367 flow [2024-06-14 12:32:21,447 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) [2024-06-14 12:32:21,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:21,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:32:21,448 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)] === [2024-06-14 12:32:21,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash -761490449, now seen corresponding path program 8 times [2024-06-14 12:32:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485755841] [2024-06-14 12:32:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:21,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:22,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485755841] [2024-06-14 12:32:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485755841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:22,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045044384] [2024-06-14 12:32:22,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:22,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:22,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:22,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:22,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 574 transitions, 9367 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) [2024-06-14 12:32:22,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:22,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:22,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:24,266 INFO L124 PetriNetUnfolderBase]: 5437/8526 cut-off events. [2024-06-14 12:32:24,267 INFO L125 PetriNetUnfolderBase]: For 717528/717534 co-relation queries the response was YES. [2024-06-14 12:32:24,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70534 conditions, 8526 events. 5437/8526 cut-off events. For 717528/717534 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52403 event pairs, 1776 based on Foata normal form. 7/8531 useless extension candidates. Maximal degree in co-relation 70375. Up to 8288 conditions per place. [2024-06-14 12:32:24,389 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 525 selfloop transitions, 29 changer transitions 0/583 dead transitions. [2024-06-14 12:32:24,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 583 transitions, 10507 flow [2024-06-14 12:32:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:32:24,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 12:32:24,390 INFO L175 Difference]: Start difference. First operand has 373 places, 574 transitions, 9367 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:32:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 583 transitions, 10507 flow [2024-06-14 12:32:26,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 583 transitions, 10388 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:26,776 INFO L231 Difference]: Finished difference. Result has 375 places, 574 transitions, 9312 flow [2024-06-14 12:32:26,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9248, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9312, PETRI_PLACES=375, PETRI_TRANSITIONS=574} [2024-06-14 12:32:26,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 12:32:26,777 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 574 transitions, 9312 flow [2024-06-14 12:32:26,777 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) [2024-06-14 12:32:26,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:26,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:32:26,778 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:26,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash 179815562, now seen corresponding path program 13 times [2024-06-14 12:32:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:26,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545936623] [2024-06-14 12:32:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:28,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:28,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545936623] [2024-06-14 12:32:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545936623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:28,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:28,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:32:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671861102] [2024-06-14 12:32:28,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:28,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:32:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:32:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:32:28,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:28,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 574 transitions, 9312 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) [2024-06-14 12:32:28,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:28,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:28,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:30,346 INFO L124 PetriNetUnfolderBase]: 5417/8488 cut-off events. [2024-06-14 12:32:30,347 INFO L125 PetriNetUnfolderBase]: For 730683/730707 co-relation queries the response was YES. [2024-06-14 12:32:30,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69858 conditions, 8488 events. 5417/8488 cut-off events. For 730683/730707 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51908 event pairs, 1194 based on Foata normal form. 36/8520 useless extension candidates. Maximal degree in co-relation 69698. Up to 7138 conditions per place. [2024-06-14 12:32:30,471 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 178 changer transitions 0/617 dead transitions. [2024-06-14 12:32:30,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 617 transitions, 10720 flow [2024-06-14 12:32:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:32:30,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:32:30,473 INFO L175 Difference]: Start difference. First operand has 375 places, 574 transitions, 9312 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:32:30,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 617 transitions, 10720 flow [2024-06-14 12:32:32,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 617 transitions, 10593 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:32,499 INFO L231 Difference]: Finished difference. Result has 380 places, 575 transitions, 9564 flow [2024-06-14 12:32:32,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9185, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9564, PETRI_PLACES=380, PETRI_TRANSITIONS=575} [2024-06-14 12:32:32,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 12:32:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 575 transitions, 9564 flow [2024-06-14 12:32:32,500 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) [2024-06-14 12:32:32,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:32,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:32:32,501 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1583672916, now seen corresponding path program 14 times [2024-06-14 12:32:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724347996] [2024-06-14 12:32:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:33,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724347996] [2024-06-14 12:32:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724347996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:32:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528395574] [2024-06-14 12:32:33,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:33,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:32:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:32:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:32:34,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:34,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 575 transitions, 9564 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:34,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:34,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:34,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:36,145 INFO L124 PetriNetUnfolderBase]: 5397/8456 cut-off events. [2024-06-14 12:32:36,145 INFO L125 PetriNetUnfolderBase]: For 734189/734213 co-relation queries the response was YES. [2024-06-14 12:32:36,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69841 conditions, 8456 events. 5397/8456 cut-off events. For 734189/734213 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 51668 event pairs, 1234 based on Foata normal form. 36/8488 useless extension candidates. Maximal degree in co-relation 69679. Up to 7351 conditions per place. [2024-06-14 12:32:36,276 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 427 selfloop transitions, 164 changer transitions 0/620 dead transitions. [2024-06-14 12:32:36,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 620 transitions, 11012 flow [2024-06-14 12:32:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:32:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:32:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-14 12:32:36,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2024-06-14 12:32:36,279 INFO L175 Difference]: Start difference. First operand has 380 places, 575 transitions, 9564 flow. Second operand 11 states and 195 transitions. [2024-06-14 12:32:36,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 620 transitions, 11012 flow [2024-06-14 12:32:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 620 transitions, 10604 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:38,832 INFO L231 Difference]: Finished difference. Result has 384 places, 577 transitions, 9533 flow [2024-06-14 12:32:38,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9156, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9533, PETRI_PLACES=384, PETRI_TRANSITIONS=577} [2024-06-14 12:32:38,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 12:32:38,833 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 577 transitions, 9533 flow [2024-06-14 12:32:38,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:38,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:38,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:38,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:32:38,834 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:38,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash 39324758, now seen corresponding path program 15 times [2024-06-14 12:32:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614982402] [2024-06-14 12:32:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:40,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614982402] [2024-06-14 12:32:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614982402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:40,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:40,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:32:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33513574] [2024-06-14 12:32:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:32:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:32:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:32:40,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:40,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 577 transitions, 9533 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) [2024-06-14 12:32:40,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:40,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:40,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:42,698 INFO L124 PetriNetUnfolderBase]: 5377/8424 cut-off events. [2024-06-14 12:32:42,699 INFO L125 PetriNetUnfolderBase]: For 729964/729988 co-relation queries the response was YES. [2024-06-14 12:32:42,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68888 conditions, 8424 events. 5377/8424 cut-off events. For 729964/729988 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51400 event pairs, 1180 based on Foata normal form. 36/8456 useless extension candidates. Maximal degree in co-relation 68724. Up to 6895 conditions per place. [2024-06-14 12:32:42,807 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 181 changer transitions 0/620 dead transitions. [2024-06-14 12:32:42,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 620 transitions, 10883 flow [2024-06-14 12:32:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:32:42,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:32:42,808 INFO L175 Difference]: Start difference. First operand has 384 places, 577 transitions, 9533 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:32:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 620 transitions, 10883 flow [2024-06-14 12:32:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 620 transitions, 10551 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:44,716 INFO L231 Difference]: Finished difference. Result has 386 places, 578 transitions, 9535 flow [2024-06-14 12:32:44,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9115, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9535, PETRI_PLACES=386, PETRI_TRANSITIONS=578} [2024-06-14 12:32:44,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-14 12:32:44,717 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 578 transitions, 9535 flow [2024-06-14 12:32:44,717 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) [2024-06-14 12:32:44,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:44,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:44,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:32:44,718 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)] === [2024-06-14 12:32:44,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -761107723, now seen corresponding path program 3 times [2024-06-14 12:32:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34533775] [2024-06-14 12:32:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:45,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34533775] [2024-06-14 12:32:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34533775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:45,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217593521] [2024-06-14 12:32:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:45,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:45,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:32:45,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 578 transitions, 9535 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:45,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:45,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:32:45,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:48,001 INFO L124 PetriNetUnfolderBase]: 5488/8546 cut-off events. [2024-06-14 12:32:48,001 INFO L125 PetriNetUnfolderBase]: For 733602/733608 co-relation queries the response was YES. [2024-06-14 12:32:48,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70241 conditions, 8546 events. 5488/8546 cut-off events. For 733602/733608 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51854 event pairs, 1791 based on Foata normal form. 7/8551 useless extension candidates. Maximal degree in co-relation 70075. Up to 8425 conditions per place. [2024-06-14 12:32:48,116 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 539 selfloop transitions, 54 changer transitions 0/596 dead transitions. [2024-06-14 12:32:48,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 596 transitions, 11157 flow [2024-06-14 12:32:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:32:48,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2024-06-14 12:32:48,117 INFO L175 Difference]: Start difference. First operand has 386 places, 578 transitions, 9535 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:32:48,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 596 transitions, 11157 flow [2024-06-14 12:32:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 596 transitions, 10570 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-14 12:32:50,221 INFO L231 Difference]: Finished difference. Result has 385 places, 584 transitions, 9172 flow [2024-06-14 12:32:50,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8948, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9172, PETRI_PLACES=385, PETRI_TRANSITIONS=584} [2024-06-14 12:32:50,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 12:32:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 584 transitions, 9172 flow [2024-06-14 12:32:50,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:50,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:50,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:50,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:32:50,223 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)] === [2024-06-14 12:32:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash -748595906, now seen corresponding path program 8 times [2024-06-14 12:32:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:50,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962314682] [2024-06-14 12:32:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962314682] [2024-06-14 12:32:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962314682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:51,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078010236] [2024-06-14 12:32:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:51,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:32:51,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 584 transitions, 9172 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:51,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:51,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:32:51,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:53,457 INFO L124 PetriNetUnfolderBase]: 5498/8554 cut-off events. [2024-06-14 12:32:53,457 INFO L125 PetriNetUnfolderBase]: For 743566/743582 co-relation queries the response was YES. [2024-06-14 12:32:53,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68768 conditions, 8554 events. 5498/8554 cut-off events. For 743566/743582 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51726 event pairs, 1312 based on Foata normal form. 18/8568 useless extension candidates. Maximal degree in co-relation 68603. Up to 8207 conditions per place. [2024-06-14 12:32:53,571 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 156 changer transitions 0/603 dead transitions. [2024-06-14 12:32:53,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 603 transitions, 10669 flow [2024-06-14 12:32:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:32:53,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 12:32:53,572 INFO L175 Difference]: Start difference. First operand has 385 places, 584 transitions, 9172 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:32:53,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 603 transitions, 10669 flow [2024-06-14 12:32:55,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 603 transitions, 10537 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:55,789 INFO L231 Difference]: Finished difference. Result has 389 places, 589 transitions, 9450 flow [2024-06-14 12:32:55,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9040, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9450, PETRI_PLACES=389, PETRI_TRANSITIONS=589} [2024-06-14 12:32:55,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 12:32:55,790 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 589 transitions, 9450 flow [2024-06-14 12:32:55,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:55,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:55,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:55,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:32:55,791 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:55,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash -748150033, now seen corresponding path program 4 times [2024-06-14 12:32:55,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:55,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007235580] [2024-06-14 12:32:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:55,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:56,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007235580] [2024-06-14 12:32:56,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007235580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:56,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:56,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935333766] [2024-06-14 12:32:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:56,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:56,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:56,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:32:56,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 589 transitions, 9450 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:56,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:56,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:32:56,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:59,054 INFO L124 PetriNetUnfolderBase]: 5495/8556 cut-off events. [2024-06-14 12:32:59,054 INFO L125 PetriNetUnfolderBase]: For 758459/758465 co-relation queries the response was YES. [2024-06-14 12:32:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69131 conditions, 8556 events. 5495/8556 cut-off events. For 758459/758465 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51877 event pairs, 1790 based on Foata normal form. 7/8561 useless extension candidates. Maximal degree in co-relation 68965. Up to 8436 conditions per place. [2024-06-14 12:32:59,173 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 540 selfloop transitions, 57 changer transitions 0/600 dead transitions. [2024-06-14 12:32:59,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 600 transitions, 10828 flow [2024-06-14 12:32:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:32:59,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34011627906976744 [2024-06-14 12:32:59,175 INFO L175 Difference]: Start difference. First operand has 389 places, 589 transitions, 9450 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:32:59,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 600 transitions, 10828 flow [2024-06-14 12:33:01,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 600 transitions, 10506 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:01,121 INFO L231 Difference]: Finished difference. Result has 392 places, 589 transitions, 9248 flow [2024-06-14 12:33:01,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9128, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9248, PETRI_PLACES=392, PETRI_TRANSITIONS=589} [2024-06-14 12:33:01,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 12:33:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 589 transitions, 9248 flow [2024-06-14 12:33:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:01,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:33:01,123 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:01,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash -761494076, now seen corresponding path program 9 times [2024-06-14 12:33:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334895246] [2024-06-14 12:33:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334895246] [2024-06-14 12:33:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334895246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:02,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:02,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:02,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072045628] [2024-06-14 12:33:02,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:02,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:33:02,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 589 transitions, 9248 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:02,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:02,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:33:02,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:04,145 INFO L124 PetriNetUnfolderBase]: 5505/8564 cut-off events. [2024-06-14 12:33:04,146 INFO L125 PetriNetUnfolderBase]: For 773477/773493 co-relation queries the response was YES. [2024-06-14 12:33:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68840 conditions, 8564 events. 5505/8564 cut-off events. For 773477/773493 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51774 event pairs, 1313 based on Foata normal form. 18/8578 useless extension candidates. Maximal degree in co-relation 68673. Up to 8213 conditions per place. [2024-06-14 12:33:04,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 457 selfloop transitions, 149 changer transitions 0/609 dead transitions. [2024-06-14 12:33:04,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 609 transitions, 10769 flow [2024-06-14 12:33:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:33:04,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 12:33:04,284 INFO L175 Difference]: Start difference. First operand has 392 places, 589 transitions, 9248 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:33:04,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 609 transitions, 10769 flow [2024-06-14 12:33:06,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 609 transitions, 10659 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:06,930 INFO L231 Difference]: Finished difference. Result has 394 places, 594 transitions, 9532 flow [2024-06-14 12:33:06,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9138, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9532, PETRI_PLACES=394, PETRI_TRANSITIONS=594} [2024-06-14 12:33:06,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 12:33:06,931 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 594 transitions, 9532 flow [2024-06-14 12:33:06,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:06,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:06,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:06,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:33:06,931 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:06,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -968895505, now seen corresponding path program 5 times [2024-06-14 12:33:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:06,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951858590] [2024-06-14 12:33:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:06,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951858590] [2024-06-14 12:33:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951858590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:07,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:07,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:07,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266054650] [2024-06-14 12:33:07,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:07,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:07,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:33:07,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 594 transitions, 9532 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:07,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:07,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:33:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:10,034 INFO L124 PetriNetUnfolderBase]: 5502/8566 cut-off events. [2024-06-14 12:33:10,034 INFO L125 PetriNetUnfolderBase]: For 789196/789202 co-relation queries the response was YES. [2024-06-14 12:33:10,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69231 conditions, 8566 events. 5502/8566 cut-off events. For 789196/789202 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51978 event pairs, 1791 based on Foata normal form. 7/8571 useless extension candidates. Maximal degree in co-relation 69063. Up to 8447 conditions per place. [2024-06-14 12:33:10,209 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 52 changer transitions 0/604 dead transitions. [2024-06-14 12:33:10,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 604 transitions, 10768 flow [2024-06-14 12:33:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:33:10,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3430232558139535 [2024-06-14 12:33:10,210 INFO L175 Difference]: Start difference. First operand has 394 places, 594 transitions, 9532 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:33:10,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 604 transitions, 10768 flow [2024-06-14 12:33:12,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 604 transitions, 10195 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:12,503 INFO L231 Difference]: Finished difference. Result has 394 places, 594 transitions, 9069 flow [2024-06-14 12:33:12,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9069, PETRI_PLACES=394, PETRI_TRANSITIONS=594} [2024-06-14 12:33:12,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 12:33:12,504 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 594 transitions, 9069 flow [2024-06-14 12:33:12,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:12,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:12,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:33:12,504 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:12,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1878173150, now seen corresponding path program 10 times [2024-06-14 12:33:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:12,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180775079] [2024-06-14 12:33:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:12,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:13,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180775079] [2024-06-14 12:33:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180775079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909041450] [2024-06-14 12:33:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:13,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:33:13,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 594 transitions, 9069 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:13,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:13,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:33:13,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:15,493 INFO L124 PetriNetUnfolderBase]: 5496/8552 cut-off events. [2024-06-14 12:33:15,493 INFO L125 PetriNetUnfolderBase]: For 795895/795911 co-relation queries the response was YES. [2024-06-14 12:33:15,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68906 conditions, 8552 events. 5496/8552 cut-off events. For 795895/795911 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51698 event pairs, 1312 based on Foata normal form. 18/8566 useless extension candidates. Maximal degree in co-relation 68737. Up to 8204 conditions per place. [2024-06-14 12:33:15,625 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 458 selfloop transitions, 148 changer transitions 0/609 dead transitions. [2024-06-14 12:33:15,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 609 transitions, 10360 flow [2024-06-14 12:33:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:33:15,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 12:33:15,626 INFO L175 Difference]: Start difference. First operand has 394 places, 594 transitions, 9069 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:33:15,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 609 transitions, 10360 flow [2024-06-14 12:33:18,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 609 transitions, 10215 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:18,161 INFO L231 Difference]: Finished difference. Result has 396 places, 594 transitions, 9228 flow [2024-06-14 12:33:18,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8924, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9228, PETRI_PLACES=396, PETRI_TRANSITIONS=594} [2024-06-14 12:33:18,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 12:33:18,162 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 594 transitions, 9228 flow [2024-06-14 12:33:18,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:18,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:18,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:18,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:33:18,163 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:18,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223373, now seen corresponding path program 1 times [2024-06-14 12:33:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:18,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992910068] [2024-06-14 12:33:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:19,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992910068] [2024-06-14 12:33:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992910068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:19,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:19,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738159158] [2024-06-14 12:33:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:19,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:19,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 594 transitions, 9228 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:19,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:19,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:21,360 INFO L124 PetriNetUnfolderBase]: 5246/8318 cut-off events. [2024-06-14 12:33:21,360 INFO L125 PetriNetUnfolderBase]: For 712926/712926 co-relation queries the response was YES. [2024-06-14 12:33:21,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65314 conditions, 8318 events. 5246/8318 cut-off events. For 712926/712926 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52032 event pairs, 1998 based on Foata normal form. 1/8309 useless extension candidates. Maximal degree in co-relation 65144. Up to 7986 conditions per place. [2024-06-14 12:33:21,518 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 557 selfloop transitions, 24 changer transitions 0/621 dead transitions. [2024-06-14 12:33:21,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 621 transitions, 10730 flow [2024-06-14 12:33:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:33:21,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:33:21,544 INFO L175 Difference]: Start difference. First operand has 396 places, 594 transitions, 9228 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:33:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 621 transitions, 10730 flow [2024-06-14 12:33:24,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 621 transitions, 10347 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:24,027 INFO L231 Difference]: Finished difference. Result has 397 places, 600 transitions, 8997 flow [2024-06-14 12:33:24,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8845, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8997, PETRI_PLACES=397, PETRI_TRANSITIONS=600} [2024-06-14 12:33:24,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 12:33:24,028 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 600 transitions, 8997 flow [2024-06-14 12:33:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:24,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:24,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:24,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:33:24,029 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)] === [2024-06-14 12:33:24,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2132558088, now seen corresponding path program 1 times [2024-06-14 12:33:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:24,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265870396] [2024-06-14 12:33:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265870396] [2024-06-14 12:33:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265870396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:24,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338336544] [2024-06-14 12:33:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:24,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:24,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:25,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:25,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 600 transitions, 8997 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) [2024-06-14 12:33:25,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:25,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:25,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:27,251 INFO L124 PetriNetUnfolderBase]: 5350/8424 cut-off events. [2024-06-14 12:33:27,251 INFO L125 PetriNetUnfolderBase]: For 727694/727694 co-relation queries the response was YES. [2024-06-14 12:33:27,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66430 conditions, 8424 events. 5350/8424 cut-off events. For 727694/727694 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52210 event pairs, 2055 based on Foata normal form. 1/8415 useless extension candidates. Maximal degree in co-relation 66259. Up to 8260 conditions per place. [2024-06-14 12:33:27,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 591 selfloop transitions, 18 changer transitions 0/619 dead transitions. [2024-06-14 12:33:27,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 619 transitions, 10357 flow [2024-06-14 12:33:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:33:27,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 12:33:27,423 INFO L175 Difference]: Start difference. First operand has 397 places, 600 transitions, 8997 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:33:27,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 619 transitions, 10357 flow [2024-06-14 12:33:30,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 619 transitions, 10282 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:30,101 INFO L231 Difference]: Finished difference. Result has 400 places, 603 transitions, 9042 flow [2024-06-14 12:33:30,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8922, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9042, PETRI_PLACES=400, PETRI_TRANSITIONS=603} [2024-06-14 12:33:30,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 12:33:30,102 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 603 transitions, 9042 flow [2024-06-14 12:33:30,102 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) [2024-06-14 12:33:30,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:30,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:30,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:33:30,102 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:30,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash 684058579, now seen corresponding path program 2 times [2024-06-14 12:33:30,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:30,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704692614] [2024-06-14 12:33:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:30,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704692614] [2024-06-14 12:33:31,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704692614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:31,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:31,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132400269] [2024-06-14 12:33:31,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:31,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:31,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:31,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:31,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 603 transitions, 9042 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:31,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:31,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:31,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:33,195 INFO L124 PetriNetUnfolderBase]: 5260/8333 cut-off events. [2024-06-14 12:33:33,195 INFO L125 PetriNetUnfolderBase]: For 743802/743802 co-relation queries the response was YES. [2024-06-14 12:33:33,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66400 conditions, 8333 events. 5260/8333 cut-off events. For 743802/743802 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52102 event pairs, 1997 based on Foata normal form. 1/8324 useless extension candidates. Maximal degree in co-relation 66227. Up to 8012 conditions per place. [2024-06-14 12:33:33,320 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 560 selfloop transitions, 18 changer transitions 0/619 dead transitions. [2024-06-14 12:33:33,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 619 transitions, 10268 flow [2024-06-14 12:33:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:33:33,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:33:33,321 INFO L175 Difference]: Start difference. First operand has 400 places, 603 transitions, 9042 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:33:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 619 transitions, 10268 flow [2024-06-14 12:33:35,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 619 transitions, 10152 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:35,925 INFO L231 Difference]: Finished difference. Result has 402 places, 603 transitions, 8968 flow [2024-06-14 12:33:35,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8926, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8968, PETRI_PLACES=402, PETRI_TRANSITIONS=603} [2024-06-14 12:33:35,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 12:33:35,926 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 603 transitions, 8968 flow [2024-06-14 12:33:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:33:35,927 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:35,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 687783601, now seen corresponding path program 1 times [2024-06-14 12:33:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:35,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895566462] [2024-06-14 12:33:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:35,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:36,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895566462] [2024-06-14 12:33:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895566462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:36,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:36,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124876417] [2024-06-14 12:33:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:36,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:36,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 603 transitions, 8968 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) [2024-06-14 12:33:36,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:36,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:36,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:38,946 INFO L124 PetriNetUnfolderBase]: 5365/8447 cut-off events. [2024-06-14 12:33:38,946 INFO L125 PetriNetUnfolderBase]: For 763714/763714 co-relation queries the response was YES. [2024-06-14 12:33:39,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67224 conditions, 8447 events. 5365/8447 cut-off events. For 763714/763714 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 52326 event pairs, 2057 based on Foata normal form. 2/8439 useless extension candidates. Maximal degree in co-relation 67050. Up to 8251 conditions per place. [2024-06-14 12:33:39,068 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 583 selfloop transitions, 35 changer transitions 0/628 dead transitions. [2024-06-14 12:33:39,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 628 transitions, 10542 flow [2024-06-14 12:33:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:33:39,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:33:39,069 INFO L175 Difference]: Start difference. First operand has 402 places, 603 transitions, 8968 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:33:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 628 transitions, 10542 flow [2024-06-14 12:33:41,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 628 transitions, 10496 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:41,661 INFO L231 Difference]: Finished difference. Result has 404 places, 612 transitions, 9141 flow [2024-06-14 12:33:41,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8922, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9141, PETRI_PLACES=404, PETRI_TRANSITIONS=612} [2024-06-14 12:33:41,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-14 12:33:41,662 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 612 transitions, 9141 flow [2024-06-14 12:33:41,663 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) [2024-06-14 12:33:41,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:41,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:33:41,663 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:41,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash 687783384, now seen corresponding path program 2 times [2024-06-14 12:33:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:41,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608484136] [2024-06-14 12:33:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:42,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608484136] [2024-06-14 12:33:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608484136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:42,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940362269] [2024-06-14 12:33:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:42,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:42,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 612 transitions, 9141 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) [2024-06-14 12:33:42,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:42,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:45,007 INFO L124 PetriNetUnfolderBase]: 5378/8465 cut-off events. [2024-06-14 12:33:45,007 INFO L125 PetriNetUnfolderBase]: For 783178/783178 co-relation queries the response was YES. [2024-06-14 12:33:45,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68233 conditions, 8465 events. 5378/8465 cut-off events. For 783178/783178 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52429 event pairs, 2056 based on Foata normal form. 1/8456 useless extension candidates. Maximal degree in co-relation 68057. Up to 8257 conditions per place. [2024-06-14 12:33:45,126 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 581 selfloop transitions, 45 changer transitions 0/636 dead transitions. [2024-06-14 12:33:45,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 636 transitions, 11017 flow [2024-06-14 12:33:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:33:45,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:33:45,127 INFO L175 Difference]: Start difference. First operand has 404 places, 612 transitions, 9141 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:33:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 636 transitions, 11017 flow [2024-06-14 12:33:47,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 636 transitions, 10947 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:47,744 INFO L231 Difference]: Finished difference. Result has 409 places, 621 transitions, 9413 flow [2024-06-14 12:33:47,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9413, PETRI_PLACES=409, PETRI_TRANSITIONS=621} [2024-06-14 12:33:47,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:33:47,745 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 621 transitions, 9413 flow [2024-06-14 12:33:47,745 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) [2024-06-14 12:33:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:47,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:33:47,745 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:47,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2132413938, now seen corresponding path program 3 times [2024-06-14 12:33:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300341092] [2024-06-14 12:33:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300341092] [2024-06-14 12:33:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300341092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:48,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:48,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234261629] [2024-06-14 12:33:48,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:48,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:48,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 621 transitions, 9413 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) [2024-06-14 12:33:48,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:48,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:48,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:50,614 INFO L124 PetriNetUnfolderBase]: 5375/8461 cut-off events. [2024-06-14 12:33:50,615 INFO L125 PetriNetUnfolderBase]: For 798755/798755 co-relation queries the response was YES. [2024-06-14 12:33:50,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68573 conditions, 8461 events. 5375/8461 cut-off events. For 798755/798755 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52439 event pairs, 2056 based on Foata normal form. 1/8452 useless extension candidates. Maximal degree in co-relation 68394. Up to 8254 conditions per place. [2024-06-14 12:33:50,961 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 581 selfloop transitions, 44 changer transitions 0/635 dead transitions. [2024-06-14 12:33:50,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 635 transitions, 10883 flow [2024-06-14 12:33:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:33:50,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:33:50,963 INFO L175 Difference]: Start difference. First operand has 409 places, 621 transitions, 9413 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:33:50,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 635 transitions, 10883 flow [2024-06-14 12:33:54,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 635 transitions, 10722 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:54,129 INFO L231 Difference]: Finished difference. Result has 414 places, 621 transitions, 9346 flow [2024-06-14 12:33:54,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9252, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9346, PETRI_PLACES=414, PETRI_TRANSITIONS=621} [2024-06-14 12:33:54,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 12:33:54,129 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 621 transitions, 9346 flow [2024-06-14 12:33:54,130 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) [2024-06-14 12:33:54,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:54,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:54,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:33:54,130 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)] === [2024-06-14 12:33:54,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash 687777649, now seen corresponding path program 3 times [2024-06-14 12:33:54,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:54,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068872742] [2024-06-14 12:33:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:55,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:55,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068872742] [2024-06-14 12:33:55,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068872742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:55,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:55,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:55,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551768455] [2024-06-14 12:33:55,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:55,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:55,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:55,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 621 transitions, 9346 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:55,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:55,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:55,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:57,133 INFO L124 PetriNetUnfolderBase]: 5292/8380 cut-off events. [2024-06-14 12:33:57,133 INFO L125 PetriNetUnfolderBase]: For 818562/818562 co-relation queries the response was YES. [2024-06-14 12:33:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68398 conditions, 8380 events. 5292/8380 cut-off events. For 818562/818562 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52418 event pairs, 1997 based on Foata normal form. 1/8371 useless extension candidates. Maximal degree in co-relation 68217. Up to 8038 conditions per place. [2024-06-14 12:33:57,262 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 563 selfloop transitions, 30 changer transitions 0/637 dead transitions. [2024-06-14 12:33:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 637 transitions, 10642 flow [2024-06-14 12:33:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:33:57,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:33:57,264 INFO L175 Difference]: Start difference. First operand has 414 places, 621 transitions, 9346 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:33:57,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 637 transitions, 10642 flow [2024-06-14 12:34:00,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 637 transitions, 10534 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:00,041 INFO L231 Difference]: Finished difference. Result has 415 places, 624 transitions, 9368 flow [2024-06-14 12:34:00,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9368, PETRI_PLACES=415, PETRI_TRANSITIONS=624} [2024-06-14 12:34:00,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 12:34:00,042 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 624 transitions, 9368 flow [2024-06-14 12:34:00,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:00,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:00,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:00,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:34:00,043 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:00,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2123832989, now seen corresponding path program 4 times [2024-06-14 12:34:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41318162] [2024-06-14 12:34:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41318162] [2024-06-14 12:34:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41318162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734718504] [2024-06-14 12:34:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:01,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 624 transitions, 9368 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:01,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:01,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:01,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:03,162 INFO L124 PetriNetUnfolderBase]: 5289/8376 cut-off events. [2024-06-14 12:34:03,163 INFO L125 PetriNetUnfolderBase]: For 832026/832026 co-relation queries the response was YES. [2024-06-14 12:34:03,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68966 conditions, 8376 events. 5289/8376 cut-off events. For 832026/832026 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52381 event pairs, 1996 based on Foata normal form. 1/8367 useless extension candidates. Maximal degree in co-relation 68784. Up to 8061 conditions per place. [2024-06-14 12:34:03,304 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 575 selfloop transitions, 18 changer transitions 0/637 dead transitions. [2024-06-14 12:34:03,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 637 transitions, 10652 flow [2024-06-14 12:34:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:34:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:34:03,306 INFO L175 Difference]: Start difference. First operand has 415 places, 624 transitions, 9368 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:34:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 637 transitions, 10652 flow [2024-06-14 12:34:06,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 637 transitions, 10544 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:06,331 INFO L231 Difference]: Finished difference. Result has 417 places, 627 transitions, 9372 flow [2024-06-14 12:34:06,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9372, PETRI_PLACES=417, PETRI_TRANSITIONS=627} [2024-06-14 12:34:06,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 12:34:06,332 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 627 transitions, 9372 flow [2024-06-14 12:34:06,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:06,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:06,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:06,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:34:06,332 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:06,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash -755768438, now seen corresponding path program 4 times [2024-06-14 12:34:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:06,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682252707] [2024-06-14 12:34:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:06,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:07,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:07,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682252707] [2024-06-14 12:34:07,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682252707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:07,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165428253] [2024-06-14 12:34:07,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:07,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:07,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:07,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 627 transitions, 9372 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) [2024-06-14 12:34:07,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:07,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:07,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:09,402 INFO L124 PetriNetUnfolderBase]: 5396/8490 cut-off events. [2024-06-14 12:34:09,403 INFO L125 PetriNetUnfolderBase]: For 850962/850962 co-relation queries the response was YES. [2024-06-14 12:34:09,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70410 conditions, 8490 events. 5396/8490 cut-off events. For 850962/850962 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52571 event pairs, 2054 based on Foata normal form. 1/8481 useless extension candidates. Maximal degree in co-relation 70227. Up to 8321 conditions per place. [2024-06-14 12:34:09,554 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 603 selfloop transitions, 28 changer transitions 0/641 dead transitions. [2024-06-14 12:34:09,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 641 transitions, 10924 flow [2024-06-14 12:34:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:34:09,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 12:34:09,556 INFO L175 Difference]: Start difference. First operand has 417 places, 627 transitions, 9372 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:34:09,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 641 transitions, 10924 flow [2024-06-14 12:34:13,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 641 transitions, 10834 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:13,096 INFO L231 Difference]: Finished difference. Result has 419 places, 630 transitions, 9426 flow [2024-06-14 12:34:13,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9282, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9426, PETRI_PLACES=419, PETRI_TRANSITIONS=630} [2024-06-14 12:34:13,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 12:34:13,097 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 630 transitions, 9426 flow [2024-06-14 12:34:13,097 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) [2024-06-14 12:34:13,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:13,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:13,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:34:13,097 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:13,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash -748144081, now seen corresponding path program 2 times [2024-06-14 12:34:13,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:13,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273182036] [2024-06-14 12:34:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:13,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:13,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:13,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273182036] [2024-06-14 12:34:13,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273182036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:13,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:13,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:13,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474216334] [2024-06-14 12:34:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:13,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:13,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:13,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:13,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 630 transitions, 9426 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) [2024-06-14 12:34:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:16,158 INFO L124 PetriNetUnfolderBase]: 5397/8492 cut-off events. [2024-06-14 12:34:16,159 INFO L125 PetriNetUnfolderBase]: For 871808/871808 co-relation queries the response was YES. [2024-06-14 12:34:16,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70471 conditions, 8492 events. 5397/8492 cut-off events. For 871808/871808 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 52606 event pairs, 2054 based on Foata normal form. 3/8485 useless extension candidates. Maximal degree in co-relation 70287. Up to 8330 conditions per place. [2024-06-14 12:34:16,292 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 614 selfloop transitions, 20 changer transitions 0/644 dead transitions. [2024-06-14 12:34:16,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 644 transitions, 10780 flow [2024-06-14 12:34:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:34:16,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 12:34:16,294 INFO L175 Difference]: Start difference. First operand has 419 places, 630 transitions, 9426 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:34:16,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 644 transitions, 10780 flow [2024-06-14 12:34:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 644 transitions, 10636 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:19,876 INFO L231 Difference]: Finished difference. Result has 421 places, 633 transitions, 9383 flow [2024-06-14 12:34:19,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9282, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9383, PETRI_PLACES=421, PETRI_TRANSITIONS=633} [2024-06-14 12:34:19,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 12:34:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 633 transitions, 9383 flow [2024-06-14 12:34:19,878 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) [2024-06-14 12:34:19,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:19,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:19,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:34:19,878 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:19,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1891244858, now seen corresponding path program 5 times [2024-06-14 12:34:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:19,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954587375] [2024-06-14 12:34:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:19,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:20,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954587375] [2024-06-14 12:34:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954587375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:20,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:20,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527580987] [2024-06-14 12:34:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:20,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:20,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:20,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:20,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 633 transitions, 9383 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) [2024-06-14 12:34:20,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:20,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:20,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:22,973 INFO L124 PetriNetUnfolderBase]: 5402/8499 cut-off events. [2024-06-14 12:34:22,973 INFO L125 PetriNetUnfolderBase]: For 881630/881630 co-relation queries the response was YES. [2024-06-14 12:34:23,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70686 conditions, 8499 events. 5402/8499 cut-off events. For 881630/881630 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 52673 event pairs, 2054 based on Foata normal form. 1/8490 useless extension candidates. Maximal degree in co-relation 70501. Up to 8343 conditions per place. [2024-06-14 12:34:23,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 618 selfloop transitions, 18 changer transitions 0/646 dead transitions. [2024-06-14 12:34:23,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 646 transitions, 10761 flow [2024-06-14 12:34:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:34:23,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2024-06-14 12:34:23,107 INFO L175 Difference]: Start difference. First operand has 421 places, 633 transitions, 9383 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:34:23,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 646 transitions, 10761 flow [2024-06-14 12:34:26,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 646 transitions, 10683 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:26,724 INFO L231 Difference]: Finished difference. Result has 423 places, 636 transitions, 9425 flow [2024-06-14 12:34:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9305, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9425, PETRI_PLACES=423, PETRI_TRANSITIONS=636} [2024-06-14 12:34:26,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 12:34:26,725 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 636 transitions, 9425 flow [2024-06-14 12:34:26,725 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) [2024-06-14 12:34:26,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:26,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:26,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:34:26,725 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:26,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1891245075, now seen corresponding path program 3 times [2024-06-14 12:34:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:26,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221365227] [2024-06-14 12:34:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221365227] [2024-06-14 12:34:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221365227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823587869] [2024-06-14 12:34:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:27,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:27,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 636 transitions, 9425 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) [2024-06-14 12:34:27,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:27,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:27,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:29,838 INFO L124 PetriNetUnfolderBase]: 5412/8515 cut-off events. [2024-06-14 12:34:29,839 INFO L125 PetriNetUnfolderBase]: For 903229/903229 co-relation queries the response was YES. [2024-06-14 12:34:29,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70917 conditions, 8515 events. 5412/8515 cut-off events. For 903229/903229 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 52750 event pairs, 2054 based on Foata normal form. 2/8507 useless extension candidates. Maximal degree in co-relation 70732. Up to 8342 conditions per place. [2024-06-14 12:34:29,958 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 616 selfloop transitions, 25 changer transitions 0/651 dead transitions. [2024-06-14 12:34:29,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 651 transitions, 10803 flow [2024-06-14 12:34:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:34:29,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 12:34:29,960 INFO L175 Difference]: Start difference. First operand has 423 places, 636 transitions, 9425 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:34:29,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 651 transitions, 10803 flow [2024-06-14 12:34:33,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 651 transitions, 10711 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:33,714 INFO L231 Difference]: Finished difference. Result has 425 places, 639 transitions, 9449 flow [2024-06-14 12:34:33,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9333, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9449, PETRI_PLACES=425, PETRI_TRANSITIONS=639} [2024-06-14 12:34:33,715 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-14 12:34:33,715 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 639 transitions, 9449 flow [2024-06-14 12:34:33,715 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) [2024-06-14 12:34:33,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:33,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:33,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:34:33,715 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:33,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1883893208, now seen corresponding path program 6 times [2024-06-14 12:34:33,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:33,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999543317] [2024-06-14 12:34:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:33,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:34,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:34,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999543317] [2024-06-14 12:34:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999543317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:34,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:34,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13585853] [2024-06-14 12:34:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:34,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:34,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:34,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:34,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 639 transitions, 9449 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) [2024-06-14 12:34:34,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:34,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:34,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:36,820 INFO L124 PetriNetUnfolderBase]: 5409/8511 cut-off events. [2024-06-14 12:34:36,821 INFO L125 PetriNetUnfolderBase]: For 912978/912978 co-relation queries the response was YES. [2024-06-14 12:34:36,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70979 conditions, 8511 events. 5409/8511 cut-off events. For 912978/912978 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 52695 event pairs, 2054 based on Foata normal form. 1/8502 useless extension candidates. Maximal degree in co-relation 70793. Up to 8338 conditions per place. [2024-06-14 12:34:36,948 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 609 selfloop transitions, 30 changer transitions 0/649 dead transitions. [2024-06-14 12:34:36,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 649 transitions, 10761 flow [2024-06-14 12:34:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:34:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 12:34:36,949 INFO L175 Difference]: Start difference. First operand has 425 places, 639 transitions, 9449 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:34:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 649 transitions, 10761 flow [2024-06-14 12:34:40,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 649 transitions, 10617 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:40,215 INFO L231 Difference]: Finished difference. Result has 427 places, 639 transitions, 9371 flow [2024-06-14 12:34:40,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9305, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9371, PETRI_PLACES=427, PETRI_TRANSITIONS=639} [2024-06-14 12:34:40,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 12:34:40,216 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 639 transitions, 9371 flow [2024-06-14 12:34:40,216 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) [2024-06-14 12:34:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:34:40,216 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:40,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -755762641, now seen corresponding path program 4 times [2024-06-14 12:34:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463953429] [2024-06-14 12:34:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:41,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463953429] [2024-06-14 12:34:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463953429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:41,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:41,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199451590] [2024-06-14 12:34:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:41,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:41,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:41,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 639 transitions, 9371 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) [2024-06-14 12:34:41,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:41,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:43,297 INFO L124 PetriNetUnfolderBase]: 5403/8503 cut-off events. [2024-06-14 12:34:43,297 INFO L125 PetriNetUnfolderBase]: For 925527/925527 co-relation queries the response was YES. [2024-06-14 12:34:43,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70802 conditions, 8503 events. 5403/8503 cut-off events. For 925527/925527 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 52753 event pairs, 2053 based on Foata normal form. 2/8495 useless extension candidates. Maximal degree in co-relation 70615. Up to 8318 conditions per place. [2024-06-14 12:34:43,415 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 609 selfloop transitions, 32 changer transitions 0/651 dead transitions. [2024-06-14 12:34:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 651 transitions, 10695 flow [2024-06-14 12:34:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:34:43,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 12:34:43,416 INFO L175 Difference]: Start difference. First operand has 427 places, 639 transitions, 9371 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:34:43,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 651 transitions, 10695 flow [2024-06-14 12:34:46,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 651 transitions, 10599 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:46,880 INFO L231 Difference]: Finished difference. Result has 428 places, 639 transitions, 9345 flow [2024-06-14 12:34:46,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9275, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9345, PETRI_PLACES=428, PETRI_TRANSITIONS=639} [2024-06-14 12:34:46,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 12:34:46,880 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 639 transitions, 9345 flow [2024-06-14 12:34:46,880 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) [2024-06-14 12:34:46,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:46,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:46,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:34:46,881 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)] === [2024-06-14 12:34:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1193339849, now seen corresponding path program 1 times [2024-06-14 12:34:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407836710] [2024-06-14 12:34:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:47,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407836710] [2024-06-14 12:34:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407836710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:47,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:47,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296267651] [2024-06-14 12:34:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:47,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:47,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:47,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 639 transitions, 9345 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:47,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:47,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:47,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:50,021 INFO L124 PetriNetUnfolderBase]: 5322/8386 cut-off events. [2024-06-14 12:34:50,021 INFO L125 PetriNetUnfolderBase]: For 1089302/1089334 co-relation queries the response was YES. [2024-06-14 12:34:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73357 conditions, 8386 events. 5322/8386 cut-off events. For 1089302/1089334 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51806 event pairs, 927 based on Foata normal form. 34/8378 useless extension candidates. Maximal degree in co-relation 73169. Up to 7569 conditions per place. [2024-06-14 12:34:50,141 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 489 selfloop transitions, 98 changer transitions 0/669 dead transitions. [2024-06-14 12:34:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 669 transitions, 10901 flow [2024-06-14 12:34:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:34:50,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:34:50,143 INFO L175 Difference]: Start difference. First operand has 428 places, 639 transitions, 9345 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:34:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 669 transitions, 10901 flow [2024-06-14 12:34:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 669 transitions, 10788 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:53,620 INFO L231 Difference]: Finished difference. Result has 429 places, 643 transitions, 9536 flow [2024-06-14 12:34:53,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9232, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9536, PETRI_PLACES=429, PETRI_TRANSITIONS=643} [2024-06-14 12:34:53,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 12:34:53,621 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 643 transitions, 9536 flow [2024-06-14 12:34:53,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:53,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:53,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:53,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:34:53,621 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)] === [2024-06-14 12:34:53,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:53,622 INFO L85 PathProgramCache]: Analyzing trace with hash -518616193, now seen corresponding path program 2 times [2024-06-14 12:34:53,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:53,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865306649] [2024-06-14 12:34:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865306649] [2024-06-14 12:34:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865306649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:54,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:54,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909842333] [2024-06-14 12:34:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:54,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:54,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 643 transitions, 9536 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:54,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:56,776 INFO L124 PetriNetUnfolderBase]: 5352/8428 cut-off events. [2024-06-14 12:34:56,776 INFO L125 PetriNetUnfolderBase]: For 1125537/1125569 co-relation queries the response was YES. [2024-06-14 12:34:56,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74532 conditions, 8428 events. 5352/8428 cut-off events. For 1125537/1125569 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 52384 event pairs, 1208 based on Foata normal form. 34/8415 useless extension candidates. Maximal degree in co-relation 74343. Up to 7669 conditions per place. [2024-06-14 12:34:56,897 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 488 selfloop transitions, 106 changer transitions 0/676 dead transitions. [2024-06-14 12:34:56,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 676 transitions, 11177 flow [2024-06-14 12:34:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:34:56,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:34:56,899 INFO L175 Difference]: Start difference. First operand has 429 places, 643 transitions, 9536 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:34:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 676 transitions, 11177 flow [2024-06-14 12:35:00,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 676 transitions, 10930 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:00,439 INFO L231 Difference]: Finished difference. Result has 433 places, 649 transitions, 9682 flow [2024-06-14 12:35:00,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9682, PETRI_PLACES=433, PETRI_TRANSITIONS=649} [2024-06-14 12:35:00,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-14 12:35:00,440 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 649 transitions, 9682 flow [2024-06-14 12:35:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:00,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:00,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:00,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:35:00,440 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)] === [2024-06-14 12:35:00,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash -518088883, now seen corresponding path program 3 times [2024-06-14 12:35:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617397852] [2024-06-14 12:35:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617397852] [2024-06-14 12:35:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617397852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:01,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:01,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328411015] [2024-06-14 12:35:01,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:01,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:01,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:01,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 649 transitions, 9682 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:01,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:01,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:01,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:03,428 INFO L124 PetriNetUnfolderBase]: 5347/8418 cut-off events. [2024-06-14 12:35:03,429 INFO L125 PetriNetUnfolderBase]: For 1135087/1135119 co-relation queries the response was YES. [2024-06-14 12:35:03,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74571 conditions, 8418 events. 5347/8418 cut-off events. For 1135087/1135119 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52111 event pairs, 1242 based on Foata normal form. 34/8413 useless extension candidates. Maximal degree in co-relation 74380. Up to 7824 conditions per place. [2024-06-14 12:35:03,558 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 486 selfloop transitions, 102 changer transitions 0/670 dead transitions. [2024-06-14 12:35:03,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 670 transitions, 10946 flow [2024-06-14 12:35:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:35:03,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:35:03,560 INFO L175 Difference]: Start difference. First operand has 433 places, 649 transitions, 9682 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:35:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 670 transitions, 10946 flow [2024-06-14 12:35:07,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 670 transitions, 10810 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:07,604 INFO L231 Difference]: Finished difference. Result has 437 places, 649 transitions, 9759 flow [2024-06-14 12:35:07,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9546, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9759, PETRI_PLACES=437, PETRI_TRANSITIONS=649} [2024-06-14 12:35:07,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 12:35:07,605 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 649 transitions, 9759 flow [2024-06-14 12:35:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:07,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:07,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:07,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:35:07,605 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)] === [2024-06-14 12:35:07,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1468666535, now seen corresponding path program 1 times [2024-06-14 12:35:07,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:07,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274887951] [2024-06-14 12:35:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:07,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:08,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274887951] [2024-06-14 12:35:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274887951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:08,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:08,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:08,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154071676] [2024-06-14 12:35:08,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:08,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:08,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:08,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 649 transitions, 9759 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) [2024-06-14 12:35:08,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:08,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:08,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:10,525 INFO L124 PetriNetUnfolderBase]: 5525/8645 cut-off events. [2024-06-14 12:35:10,526 INFO L125 PetriNetUnfolderBase]: For 1192318/1192336 co-relation queries the response was YES. [2024-06-14 12:35:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77096 conditions, 8645 events. 5525/8645 cut-off events. For 1192318/1192336 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 53087 event pairs, 1310 based on Foata normal form. 18/8658 useless extension candidates. Maximal degree in co-relation 76903. Up to 8163 conditions per place. [2024-06-14 12:35:10,667 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 541 selfloop transitions, 111 changer transitions 0/691 dead transitions. [2024-06-14 12:35:10,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 691 transitions, 11590 flow [2024-06-14 12:35:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:35:10,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:35:10,669 INFO L175 Difference]: Start difference. First operand has 437 places, 649 transitions, 9759 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:35:10,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 691 transitions, 11590 flow [2024-06-14 12:35:14,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 691 transitions, 11351 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:14,166 INFO L231 Difference]: Finished difference. Result has 441 places, 661 transitions, 9995 flow [2024-06-14 12:35:14,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9528, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9995, PETRI_PLACES=441, PETRI_TRANSITIONS=661} [2024-06-14 12:35:14,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 12:35:14,168 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 661 transitions, 9995 flow [2024-06-14 12:35:14,168 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) [2024-06-14 12:35:14,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:14,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:14,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:35:14,170 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:14,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash -429450835, now seen corresponding path program 1 times [2024-06-14 12:35:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:14,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729035702] [2024-06-14 12:35:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729035702] [2024-06-14 12:35:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729035702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:15,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:35:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848961573] [2024-06-14 12:35:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:35:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:35:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:35:15,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:35:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 661 transitions, 9995 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:15,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:15,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:35:15,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:17,866 INFO L124 PetriNetUnfolderBase]: 5674/8805 cut-off events. [2024-06-14 12:35:17,866 INFO L125 PetriNetUnfolderBase]: For 1209600/1209612 co-relation queries the response was YES. [2024-06-14 12:35:17,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79467 conditions, 8805 events. 5674/8805 cut-off events. For 1209600/1209612 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 53432 event pairs, 1355 based on Foata normal form. 14/8818 useless extension candidates. Maximal degree in co-relation 79271. Up to 8357 conditions per place. [2024-06-14 12:35:18,023 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 554 selfloop transitions, 152 changer transitions 0/709 dead transitions. [2024-06-14 12:35:18,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 709 transitions, 12374 flow [2024-06-14 12:35:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:35:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:35:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:35:18,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 12:35:18,025 INFO L175 Difference]: Start difference. First operand has 441 places, 661 transitions, 9995 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:35:18,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 709 transitions, 12374 flow [2024-06-14 12:35:22,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 709 transitions, 12229 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:22,945 INFO L231 Difference]: Finished difference. Result has 448 places, 673 transitions, 10382 flow [2024-06-14 12:35:22,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9864, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10382, PETRI_PLACES=448, PETRI_TRANSITIONS=673} [2024-06-14 12:35:22,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-14 12:35:22,946 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 673 transitions, 10382 flow [2024-06-14 12:35:22,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:22,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:22,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:22,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:35:22,947 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:22,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1437872535, now seen corresponding path program 2 times [2024-06-14 12:35:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332593629] [2024-06-14 12:35:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:22,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:23,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:23,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332593629] [2024-06-14 12:35:23,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332593629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:23,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560351701] [2024-06-14 12:35:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:23,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:23,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:23,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:23,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 673 transitions, 10382 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) [2024-06-14 12:35:23,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:23,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:23,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:26,073 INFO L124 PetriNetUnfolderBase]: 5550/8680 cut-off events. [2024-06-14 12:35:26,074 INFO L125 PetriNetUnfolderBase]: For 1243560/1243577 co-relation queries the response was YES. [2024-06-14 12:35:26,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79146 conditions, 8680 events. 5550/8680 cut-off events. For 1243560/1243577 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 53329 event pairs, 1348 based on Foata normal form. 18/8695 useless extension candidates. Maximal degree in co-relation 78948. Up to 8257 conditions per place. [2024-06-14 12:35:26,221 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 555 selfloop transitions, 104 changer transitions 0/698 dead transitions. [2024-06-14 12:35:26,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 698 transitions, 11802 flow [2024-06-14 12:35:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:35:26,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:35:26,223 INFO L175 Difference]: Start difference. First operand has 448 places, 673 transitions, 10382 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:35:26,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 698 transitions, 11802 flow [2024-06-14 12:35:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 698 transitions, 11698 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:29,390 INFO L231 Difference]: Finished difference. Result has 453 places, 673 transitions, 10493 flow [2024-06-14 12:35:29,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10278, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10493, PETRI_PLACES=453, PETRI_TRANSITIONS=673} [2024-06-14 12:35:29,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 12:35:29,391 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 673 transitions, 10493 flow [2024-06-14 12:35:29,391 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) [2024-06-14 12:35:29,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:29,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:35:29,392 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:29,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1438428241, now seen corresponding path program 2 times [2024-06-14 12:35:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260191274] [2024-06-14 12:35:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:30,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:30,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260191274] [2024-06-14 12:35:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260191274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:30,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:30,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:35:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720561063] [2024-06-14 12:35:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:35:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:35:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:35:30,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:35:30,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 673 transitions, 10493 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:30,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:30,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:35:30,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:32,856 INFO L124 PetriNetUnfolderBase]: 5680/8818 cut-off events. [2024-06-14 12:35:32,856 INFO L125 PetriNetUnfolderBase]: For 1246681/1246693 co-relation queries the response was YES. [2024-06-14 12:35:32,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80110 conditions, 8818 events. 5680/8818 cut-off events. For 1246681/1246693 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 53611 event pairs, 1432 based on Foata normal form. 14/8831 useless extension candidates. Maximal degree in co-relation 79910. Up to 8363 conditions per place. [2024-06-14 12:35:33,025 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 536 selfloop transitions, 176 changer transitions 0/715 dead transitions. [2024-06-14 12:35:33,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 715 transitions, 12578 flow [2024-06-14 12:35:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:35:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:35:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 12:35:33,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 12:35:33,027 INFO L175 Difference]: Start difference. First operand has 453 places, 673 transitions, 10493 flow. Second operand 10 states and 166 transitions. [2024-06-14 12:35:33,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 715 transitions, 12578 flow [2024-06-14 12:35:37,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 715 transitions, 12345 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:35:37,669 INFO L231 Difference]: Finished difference. Result has 456 places, 686 transitions, 10824 flow [2024-06-14 12:35:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10260, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10824, PETRI_PLACES=456, PETRI_TRANSITIONS=686} [2024-06-14 12:35:37,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-14 12:35:37,678 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 686 transitions, 10824 flow [2024-06-14 12:35:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:37,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:37,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:35:37,679 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:37,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash 831601891, now seen corresponding path program 3 times [2024-06-14 12:35:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40665428] [2024-06-14 12:35:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:38,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40665428] [2024-06-14 12:35:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40665428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:38,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:38,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577084022] [2024-06-14 12:35:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:38,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:38,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:38,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:38,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 686 transitions, 10824 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) [2024-06-14 12:35:38,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:38,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:38,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:40,928 INFO L124 PetriNetUnfolderBase]: 5626/8774 cut-off events. [2024-06-14 12:35:40,928 INFO L125 PetriNetUnfolderBase]: For 1286903/1286919 co-relation queries the response was YES. [2024-06-14 12:35:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81195 conditions, 8774 events. 5626/8774 cut-off events. For 1286903/1286919 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 53800 event pairs, 1265 based on Foata normal form. 18/8789 useless extension candidates. Maximal degree in co-relation 80994. Up to 8288 conditions per place. [2024-06-14 12:35:41,091 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 576 selfloop transitions, 115 changer transitions 0/730 dead transitions. [2024-06-14 12:35:41,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 730 transitions, 12750 flow [2024-06-14 12:35:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:35:41,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:35:41,093 INFO L175 Difference]: Start difference. First operand has 456 places, 686 transitions, 10824 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:35:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 730 transitions, 12750 flow [2024-06-14 12:35:45,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 730 transitions, 12496 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:45,420 INFO L231 Difference]: Finished difference. Result has 461 places, 702 transitions, 11103 flow [2024-06-14 12:35:45,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11103, PETRI_PLACES=461, PETRI_TRANSITIONS=702} [2024-06-14 12:35:45,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 12:35:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 702 transitions, 11103 flow [2024-06-14 12:35:45,439 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) [2024-06-14 12:35:45,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:45,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:35:45,439 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)] === [2024-06-14 12:35:45,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -429458771, now seen corresponding path program 4 times [2024-06-14 12:35:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:45,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084322448] [2024-06-14 12:35:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:46,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:46,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084322448] [2024-06-14 12:35:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084322448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:46,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:46,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568109225] [2024-06-14 12:35:46,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:46,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:46,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 702 transitions, 11103 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) [2024-06-14 12:35:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:46,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:46,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:48,732 INFO L124 PetriNetUnfolderBase]: 5636/8788 cut-off events. [2024-06-14 12:35:48,732 INFO L125 PetriNetUnfolderBase]: For 1315242/1315258 co-relation queries the response was YES. [2024-06-14 12:35:48,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81735 conditions, 8788 events. 5636/8788 cut-off events. For 1315242/1315258 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 53861 event pairs, 1285 based on Foata normal form. 18/8803 useless extension candidates. Maximal degree in co-relation 81531. Up to 8365 conditions per place. [2024-06-14 12:35:48,890 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 585 selfloop transitions, 105 changer transitions 0/729 dead transitions. [2024-06-14 12:35:48,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 729 transitions, 12667 flow [2024-06-14 12:35:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:35:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:35:48,892 INFO L175 Difference]: Start difference. First operand has 461 places, 702 transitions, 11103 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:35:48,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 729 transitions, 12667 flow [2024-06-14 12:35:52,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 729 transitions, 12491 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:52,612 INFO L231 Difference]: Finished difference. Result has 467 places, 706 transitions, 11249 flow [2024-06-14 12:35:52,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10965, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11249, PETRI_PLACES=467, PETRI_TRANSITIONS=706} [2024-06-14 12:35:52,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-14 12:35:52,625 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 706 transitions, 11249 flow [2024-06-14 12:35:52,625 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) [2024-06-14 12:35:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:35:52,626 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)] === [2024-06-14 12:35:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -319881521, now seen corresponding path program 5 times [2024-06-14 12:35:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704274189] [2024-06-14 12:35:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:53,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704274189] [2024-06-14 12:35:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704274189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:53,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:53,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193147022] [2024-06-14 12:35:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:53,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:53,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 706 transitions, 11249 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) [2024-06-14 12:35:53,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:53,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:53,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:56,039 INFO L124 PetriNetUnfolderBase]: 5670/8835 cut-off events. [2024-06-14 12:35:56,039 INFO L125 PetriNetUnfolderBase]: For 1356466/1356480 co-relation queries the response was YES. [2024-06-14 12:35:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82832 conditions, 8835 events. 5670/8835 cut-off events. For 1356466/1356480 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 54113 event pairs, 1264 based on Foata normal form. 16/8850 useless extension candidates. Maximal degree in co-relation 82626. Up to 8175 conditions per place. [2024-06-14 12:35:56,201 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 563 selfloop transitions, 143 changer transitions 0/745 dead transitions. [2024-06-14 12:35:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 745 transitions, 13427 flow [2024-06-14 12:35:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:35:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:35:56,202 INFO L175 Difference]: Start difference. First operand has 467 places, 706 transitions, 11249 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:35:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 745 transitions, 13427 flow [2024-06-14 12:36:01,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 745 transitions, 13209 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:01,058 INFO L231 Difference]: Finished difference. Result has 470 places, 715 transitions, 11557 flow [2024-06-14 12:36:01,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11031, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11557, PETRI_PLACES=470, PETRI_TRANSITIONS=715} [2024-06-14 12:36:01,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-14 12:36:01,059 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 715 transitions, 11557 flow [2024-06-14 12:36:01,059 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) [2024-06-14 12:36:01,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:01,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:36:01,059 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:01,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1561637541, now seen corresponding path program 1 times [2024-06-14 12:36:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:01,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491366457] [2024-06-14 12:36:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:01,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491366457] [2024-06-14 12:36:01,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491366457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:01,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:01,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497027647] [2024-06-14 12:36:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:02,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 715 transitions, 11557 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) [2024-06-14 12:36:02,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:02,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:02,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:04,500 INFO L124 PetriNetUnfolderBase]: 5675/8848 cut-off events. [2024-06-14 12:36:04,500 INFO L125 PetriNetUnfolderBase]: For 1381559/1381563 co-relation queries the response was YES. [2024-06-14 12:36:04,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83785 conditions, 8848 events. 5675/8848 cut-off events. For 1381559/1381563 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 54336 event pairs, 1745 based on Foata normal form. 3/8846 useless extension candidates. Maximal degree in co-relation 83578. Up to 8591 conditions per place. [2024-06-14 12:36:04,690 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 677 selfloop transitions, 27 changer transitions 0/743 dead transitions. [2024-06-14 12:36:04,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 743 transitions, 13163 flow [2024-06-14 12:36:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:36:04,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:36:04,692 INFO L175 Difference]: Start difference. First operand has 470 places, 715 transitions, 11557 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:36:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 743 transitions, 13163 flow [2024-06-14 12:36:09,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 743 transitions, 12899 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:09,216 INFO L231 Difference]: Finished difference. Result has 475 places, 718 transitions, 11451 flow [2024-06-14 12:36:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11295, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11451, PETRI_PLACES=475, PETRI_TRANSITIONS=718} [2024-06-14 12:36:09,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-14 12:36:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 718 transitions, 11451 flow [2024-06-14 12:36:09,217 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) [2024-06-14 12:36:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:36:09,217 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:09,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1577372857, now seen corresponding path program 1 times [2024-06-14 12:36:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79885746] [2024-06-14 12:36:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79885746] [2024-06-14 12:36:10,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79885746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:10,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803987319] [2024-06-14 12:36:10,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:10,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:36:10,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 718 transitions, 11451 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:36:10,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:36:10,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:12,859 INFO L124 PetriNetUnfolderBase]: 5788/8968 cut-off events. [2024-06-14 12:36:12,859 INFO L125 PetriNetUnfolderBase]: For 1399620/1399622 co-relation queries the response was YES. [2024-06-14 12:36:13,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84408 conditions, 8968 events. 5788/8968 cut-off events. For 1399620/1399622 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 54604 event pairs, 1805 based on Foata normal form. 3/8970 useless extension candidates. Maximal degree in co-relation 84199. Up to 8841 conditions per place. [2024-06-14 12:36:13,112 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 693 selfloop transitions, 51 changer transitions 0/747 dead transitions. [2024-06-14 12:36:13,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 747 transitions, 13363 flow [2024-06-14 12:36:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:36:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:36:13,113 INFO L175 Difference]: Start difference. First operand has 475 places, 718 transitions, 11451 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:36:13,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 747 transitions, 13363 flow [2024-06-14 12:36:19,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 747 transitions, 13222 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:19,392 INFO L231 Difference]: Finished difference. Result has 477 places, 724 transitions, 11552 flow [2024-06-14 12:36:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11310, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11552, PETRI_PLACES=477, PETRI_TRANSITIONS=724} [2024-06-14 12:36:19,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 433 predicate places. [2024-06-14 12:36:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 724 transitions, 11552 flow [2024-06-14 12:36:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:36:19,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:19,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:36:19,393 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:19,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 836369257, now seen corresponding path program 2 times [2024-06-14 12:36:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:19,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683455202] [2024-06-14 12:36:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:20,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:20,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683455202] [2024-06-14 12:36:20,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683455202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:20,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:20,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:20,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194910621] [2024-06-14 12:36:20,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:20,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:20,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:20,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:20,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 724 transitions, 11552 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) [2024-06-14 12:36:20,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:20,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:20,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:22,840 INFO L124 PetriNetUnfolderBase]: 5701/8884 cut-off events. [2024-06-14 12:36:22,840 INFO L125 PetriNetUnfolderBase]: For 1438798/1438802 co-relation queries the response was YES. [2024-06-14 12:36:22,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84818 conditions, 8884 events. 5701/8884 cut-off events. For 1438798/1438802 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 54604 event pairs, 1746 based on Foata normal form. 3/8882 useless extension candidates. Maximal degree in co-relation 84608. Up to 8595 conditions per place. [2024-06-14 12:36:22,996 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 667 selfloop transitions, 45 changer transitions 0/753 dead transitions. [2024-06-14 12:36:22,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 753 transitions, 13470 flow [2024-06-14 12:36:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:36:22,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:36:22,997 INFO L175 Difference]: Start difference. First operand has 477 places, 724 transitions, 11552 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:36:22,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 753 transitions, 13470 flow [2024-06-14 12:36:28,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 753 transitions, 13332 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:28,812 INFO L231 Difference]: Finished difference. Result has 481 places, 730 transitions, 11712 flow [2024-06-14 12:36:28,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11414, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11712, PETRI_PLACES=481, PETRI_TRANSITIONS=730} [2024-06-14 12:36:28,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-14 12:36:28,813 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 730 transitions, 11712 flow [2024-06-14 12:36:28,813 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) [2024-06-14 12:36:28,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:28,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:28,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:36:28,814 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:28,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash 836369071, now seen corresponding path program 6 times [2024-06-14 12:36:28,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:28,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804786966] [2024-06-14 12:36:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804786966] [2024-06-14 12:36:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804786966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:29,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:29,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221311596] [2024-06-14 12:36:29,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:29,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:29,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:29,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 730 transitions, 11712 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) [2024-06-14 12:36:29,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:29,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:29,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:32,159 INFO L124 PetriNetUnfolderBase]: 5719/8903 cut-off events. [2024-06-14 12:36:32,160 INFO L125 PetriNetUnfolderBase]: For 1478925/1478939 co-relation queries the response was YES. [2024-06-14 12:36:32,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85643 conditions, 8903 events. 5719/8903 cut-off events. For 1478925/1478939 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 54523 event pairs, 1256 based on Foata normal form. 16/8918 useless extension candidates. Maximal degree in co-relation 85431. Up to 8232 conditions per place. [2024-06-14 12:36:32,599 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 564 selfloop transitions, 158 changer transitions 0/763 dead transitions. [2024-06-14 12:36:32,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 763 transitions, 13772 flow [2024-06-14 12:36:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:36:32,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:36:32,601 INFO L175 Difference]: Start difference. First operand has 481 places, 730 transitions, 11712 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:36:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 763 transitions, 13772 flow [2024-06-14 12:36:38,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 763 transitions, 13630 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:38,120 INFO L231 Difference]: Finished difference. Result has 486 places, 736 transitions, 11972 flow [2024-06-14 12:36:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11570, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11972, PETRI_PLACES=486, PETRI_TRANSITIONS=736} [2024-06-14 12:36:38,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-14 12:36:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 736 transitions, 11972 flow [2024-06-14 12:36:38,121 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) [2024-06-14 12:36:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:36:38,121 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2072452513, now seen corresponding path program 2 times [2024-06-14 12:36:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195539416] [2024-06-14 12:36:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195539416] [2024-06-14 12:36:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195539416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:38,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578851236] [2024-06-14 12:36:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:38,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:36:38,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 736 transitions, 11972 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:36:38,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:38,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:36:38,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:41,430 INFO L124 PetriNetUnfolderBase]: 5824/9018 cut-off events. [2024-06-14 12:36:41,430 INFO L125 PetriNetUnfolderBase]: For 1496105/1496107 co-relation queries the response was YES. [2024-06-14 12:36:41,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86810 conditions, 9018 events. 5824/9018 cut-off events. For 1496105/1496107 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54946 event pairs, 1804 based on Foata normal form. 3/9020 useless extension candidates. Maximal degree in co-relation 86596. Up to 8915 conditions per place. [2024-06-14 12:36:41,588 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 712 selfloop transitions, 43 changer transitions 0/758 dead transitions. [2024-06-14 12:36:41,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 758 transitions, 13590 flow [2024-06-14 12:36:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:36:41,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-14 12:36:41,589 INFO L175 Difference]: Start difference. First operand has 486 places, 736 transitions, 11972 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:36:41,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 758 transitions, 13590 flow [2024-06-14 12:36:47,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 758 transitions, 13359 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:47,406 INFO L231 Difference]: Finished difference. Result has 490 places, 739 transitions, 11877 flow [2024-06-14 12:36:47,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11741, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11877, PETRI_PLACES=490, PETRI_TRANSITIONS=739} [2024-06-14 12:36:47,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-14 12:36:47,407 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 739 transitions, 11877 flow [2024-06-14 12:36:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:36:47,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:47,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:47,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:36:47,407 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:47,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1573393681, now seen corresponding path program 7 times [2024-06-14 12:36:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:47,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289533384] [2024-06-14 12:36:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:48,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289533384] [2024-06-14 12:36:48,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289533384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:48,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:48,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312121543] [2024-06-14 12:36:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:48,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:48,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:48,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:48,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:48,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:48,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 739 transitions, 11877 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) [2024-06-14 12:36:48,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:48,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:48,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:50,727 INFO L124 PetriNetUnfolderBase]: 5718/8900 cut-off events. [2024-06-14 12:36:50,728 INFO L125 PetriNetUnfolderBase]: For 1518520/1518536 co-relation queries the response was YES. [2024-06-14 12:36:50,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85969 conditions, 8900 events. 5718/8900 cut-off events. For 1518520/1518536 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54527 event pairs, 1273 based on Foata normal form. 16/8911 useless extension candidates. Maximal degree in co-relation 85754. Up to 8478 conditions per place. [2024-06-14 12:36:50,917 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 608 selfloop transitions, 109 changer transitions 0/759 dead transitions. [2024-06-14 12:36:50,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 759 transitions, 13389 flow [2024-06-14 12:36:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:36:50,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:36:50,919 INFO L175 Difference]: Start difference. First operand has 490 places, 739 transitions, 11877 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:36:50,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 759 transitions, 13389 flow [2024-06-14 12:36:56,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 759 transitions, 13271 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:56,459 INFO L231 Difference]: Finished difference. Result has 492 places, 739 transitions, 11983 flow [2024-06-14 12:36:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11759, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11983, PETRI_PLACES=492, PETRI_TRANSITIONS=739} [2024-06-14 12:36:56,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-14 12:36:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 739 transitions, 11983 flow [2024-06-14 12:36:56,461 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) [2024-06-14 12:36:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:56,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:36:56,461 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:56,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1573513651, now seen corresponding path program 8 times [2024-06-14 12:36:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425017709] [2024-06-14 12:36:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425017709] [2024-06-14 12:36:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425017709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:57,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551502892] [2024-06-14 12:36:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:57,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:57,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 739 transitions, 11983 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) [2024-06-14 12:36:57,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:57,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:57,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:59,828 INFO L124 PetriNetUnfolderBase]: 5712/8892 cut-off events. [2024-06-14 12:36:59,828 INFO L125 PetriNetUnfolderBase]: For 1534446/1534462 co-relation queries the response was YES. [2024-06-14 12:36:59,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86099 conditions, 8892 events. 5712/8892 cut-off events. For 1534446/1534462 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54493 event pairs, 1272 based on Foata normal form. 16/8903 useless extension candidates. Maximal degree in co-relation 85883. Up to 8431 conditions per place. [2024-06-14 12:36:59,988 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 594 selfloop transitions, 125 changer transitions 0/761 dead transitions. [2024-06-14 12:36:59,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 761 transitions, 13725 flow [2024-06-14 12:36:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:36:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:36:59,989 INFO L175 Difference]: Start difference. First operand has 492 places, 739 transitions, 11983 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:36:59,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 761 transitions, 13725 flow [2024-06-14 12:37:05,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 761 transitions, 13502 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:05,940 INFO L231 Difference]: Finished difference. Result has 495 places, 739 transitions, 12016 flow [2024-06-14 12:37:05,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11760, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12016, PETRI_PLACES=495, PETRI_TRANSITIONS=739} [2024-06-14 12:37:05,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-14 12:37:05,940 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 739 transitions, 12016 flow [2024-06-14 12:37:05,941 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) [2024-06-14 12:37:05,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:05,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:37:05,941 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:05,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 841010887, now seen corresponding path program 3 times [2024-06-14 12:37:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543904573] [2024-06-14 12:37:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:06,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543904573] [2024-06-14 12:37:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543904573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:06,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:06,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:06,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106410490] [2024-06-14 12:37:06,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:06,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:06,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:06,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:06,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:06,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:06,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 739 transitions, 12016 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) [2024-06-14 12:37:06,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:06,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:06,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:09,671 INFO L124 PetriNetUnfolderBase]: 5709/8896 cut-off events. [2024-06-14 12:37:09,671 INFO L125 PetriNetUnfolderBase]: For 1549153/1549157 co-relation queries the response was YES. [2024-06-14 12:37:09,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86223 conditions, 8896 events. 5709/8896 cut-off events. For 1549153/1549157 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 54733 event pairs, 1744 based on Foata normal form. 3/8894 useless extension candidates. Maximal degree in co-relation 86006. Up to 8636 conditions per place. [2024-06-14 12:37:09,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 682 selfloop transitions, 34 changer transitions 0/758 dead transitions. [2024-06-14 12:37:09,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 758 transitions, 13518 flow [2024-06-14 12:37:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:37:09,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 12:37:09,834 INFO L175 Difference]: Start difference. First operand has 495 places, 739 transitions, 12016 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:37:09,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 758 transitions, 13518 flow [2024-06-14 12:37:15,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 758 transitions, 13163 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:15,794 INFO L231 Difference]: Finished difference. Result has 497 places, 739 transitions, 11735 flow [2024-06-14 12:37:15,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11661, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11735, PETRI_PLACES=497, PETRI_TRANSITIONS=739} [2024-06-14 12:37:15,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-14 12:37:15,794 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 739 transitions, 11735 flow [2024-06-14 12:37:15,795 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) [2024-06-14 12:37:15,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:15,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:15,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:37:15,795 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:15,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 841011073, now seen corresponding path program 3 times [2024-06-14 12:37:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057898002] [2024-06-14 12:37:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057898002] [2024-06-14 12:37:16,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057898002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:16,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:16,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:16,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784819570] [2024-06-14 12:37:16,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:37:16,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 739 transitions, 11735 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:37:16,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:16,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:37:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:19,532 INFO L124 PetriNetUnfolderBase]: 5806/8994 cut-off events. [2024-06-14 12:37:19,533 INFO L125 PetriNetUnfolderBase]: For 1560782/1560784 co-relation queries the response was YES. [2024-06-14 12:37:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86446 conditions, 8994 events. 5806/8994 cut-off events. For 1560782/1560784 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54808 event pairs, 1802 based on Foata normal form. 3/8996 useless extension candidates. Maximal degree in co-relation 86228. Up to 8885 conditions per place. [2024-06-14 12:37:19,928 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 707 selfloop transitions, 48 changer transitions 0/758 dead transitions. [2024-06-14 12:37:19,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 758 transitions, 13315 flow [2024-06-14 12:37:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 12:37:19,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-14 12:37:19,930 INFO L175 Difference]: Start difference. First operand has 497 places, 739 transitions, 11735 flow. Second operand 9 states and 139 transitions. [2024-06-14 12:37:19,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 758 transitions, 13315 flow [2024-06-14 12:37:26,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 758 transitions, 13210 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:37:26,281 INFO L231 Difference]: Finished difference. Result has 498 places, 739 transitions, 11732 flow [2024-06-14 12:37:26,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11732, PETRI_PLACES=498, PETRI_TRANSITIONS=739} [2024-06-14 12:37:26,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 454 predicate places. [2024-06-14 12:37:26,281 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 739 transitions, 11732 flow [2024-06-14 12:37:26,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:37:26,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:26,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:37:26,282 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:26,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1573401617, now seen corresponding path program 3 times [2024-06-14 12:37:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172036886] [2024-06-14 12:37:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172036886] [2024-06-14 12:37:27,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172036886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:27,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:27,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:27,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894896340] [2024-06-14 12:37:27,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:27,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:27,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:27,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:37:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 739 transitions, 11732 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:27,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:37:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:30,721 INFO L124 PetriNetUnfolderBase]: 5816/9000 cut-off events. [2024-06-14 12:37:30,721 INFO L125 PetriNetUnfolderBase]: For 1592574/1592588 co-relation queries the response was YES. [2024-06-14 12:37:30,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86780 conditions, 9000 events. 5816/9000 cut-off events. For 1592574/1592588 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54699 event pairs, 1301 based on Foata normal form. 16/9015 useless extension candidates. Maximal degree in co-relation 86561. Up to 8549 conditions per place. [2024-06-14 12:37:30,887 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 598 selfloop transitions, 173 changer transitions 0/774 dead transitions. [2024-06-14 12:37:30,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 774 transitions, 14172 flow [2024-06-14 12:37:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:37:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:37:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 12:37:30,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 12:37:30,889 INFO L175 Difference]: Start difference. First operand has 498 places, 739 transitions, 11732 flow. Second operand 10 states and 166 transitions. [2024-06-14 12:37:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 774 transitions, 14172 flow [2024-06-14 12:37:37,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 774 transitions, 14047 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:37:37,859 INFO L231 Difference]: Finished difference. Result has 500 places, 744 transitions, 12045 flow [2024-06-14 12:37:37,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11607, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12045, PETRI_PLACES=500, PETRI_TRANSITIONS=744} [2024-06-14 12:37:37,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 456 predicate places. [2024-06-14 12:37:37,870 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 744 transitions, 12045 flow [2024-06-14 12:37:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:37,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:37,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:37:37,870 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1573747577, now seen corresponding path program 4 times [2024-06-14 12:37:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:37,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21972286] [2024-06-14 12:37:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:38,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:38,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21972286] [2024-06-14 12:37:38,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21972286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:38,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:38,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:38,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340130363] [2024-06-14 12:37:38,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:38,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:38,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:37:38,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 744 transitions, 12045 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:38,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:38,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:37:38,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:42,188 INFO L124 PetriNetUnfolderBase]: 5826/9014 cut-off events. [2024-06-14 12:37:42,189 INFO L125 PetriNetUnfolderBase]: For 1621739/1621753 co-relation queries the response was YES. [2024-06-14 12:37:42,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87430 conditions, 9014 events. 5826/9014 cut-off events. For 1621739/1621753 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 54723 event pairs, 1307 based on Foata normal form. 16/9029 useless extension candidates. Maximal degree in co-relation 87210. Up to 8559 conditions per place. [2024-06-14 12:37:42,350 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 590 selfloop transitions, 185 changer transitions 0/778 dead transitions. [2024-06-14 12:37:42,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 778 transitions, 14497 flow [2024-06-14 12:37:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:37:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:37:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 12:37:42,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:37:42,351 INFO L175 Difference]: Start difference. First operand has 500 places, 744 transitions, 12045 flow. Second operand 10 states and 165 transitions. [2024-06-14 12:37:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 778 transitions, 14497 flow [2024-06-14 12:37:48,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 778 transitions, 14117 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:48,039 INFO L231 Difference]: Finished difference. Result has 503 places, 749 transitions, 12137 flow [2024-06-14 12:37:48,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11677, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12137, PETRI_PLACES=503, PETRI_TRANSITIONS=749} [2024-06-14 12:37:48,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 459 predicate places. [2024-06-14 12:37:48,040 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 749 transitions, 12137 flow [2024-06-14 12:37:48,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:48,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:48,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:48,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:37:48,041 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:48,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1573760101, now seen corresponding path program 1 times [2024-06-14 12:37:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782919380] [2024-06-14 12:37:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782919380] [2024-06-14 12:37:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782919380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:48,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668667499] [2024-06-14 12:37:48,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:48,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:49,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:37:49,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 749 transitions, 12137 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:49,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:49,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:37:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:52,269 INFO L124 PetriNetUnfolderBase]: 5836/9036 cut-off events. [2024-06-14 12:37:52,269 INFO L125 PetriNetUnfolderBase]: For 1649085/1649087 co-relation queries the response was YES. [2024-06-14 12:37:52,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87805 conditions, 9036 events. 5836/9036 cut-off events. For 1649085/1649087 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 55029 event pairs, 1810 based on Foata normal form. 4/9039 useless extension candidates. Maximal degree in co-relation 87584. Up to 8887 conditions per place. [2024-06-14 12:37:52,441 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 715 selfloop transitions, 60 changer transitions 0/778 dead transitions. [2024-06-14 12:37:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 778 transitions, 14123 flow [2024-06-14 12:37:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:37:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:37:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 12:37:52,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-14 12:37:52,443 INFO L175 Difference]: Start difference. First operand has 503 places, 749 transitions, 12137 flow. Second operand 10 states and 156 transitions. [2024-06-14 12:37:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 778 transitions, 14123 flow [2024-06-14 12:37:58,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 778 transitions, 13721 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:58,225 INFO L231 Difference]: Finished difference. Result has 506 places, 755 transitions, 11995 flow [2024-06-14 12:37:58,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11735, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11995, PETRI_PLACES=506, PETRI_TRANSITIONS=755} [2024-06-14 12:37:58,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 462 predicate places. [2024-06-14 12:37:58,226 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 755 transitions, 11995 flow [2024-06-14 12:37:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:58,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:58,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:58,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:37:58,226 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:58,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash -142205455, now seen corresponding path program 5 times [2024-06-14 12:37:58,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:58,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698145390] [2024-06-14 12:37:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698145390] [2024-06-14 12:37:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698145390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:59,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:59,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334190388] [2024-06-14 12:37:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:59,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:37:59,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 755 transitions, 11995 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:59,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:37:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:02,456 INFO L124 PetriNetUnfolderBase]: 5830/9020 cut-off events. [2024-06-14 12:38:02,456 INFO L125 PetriNetUnfolderBase]: For 1661214/1661228 co-relation queries the response was YES. [2024-06-14 12:38:02,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87685 conditions, 9020 events. 5830/9020 cut-off events. For 1661214/1661228 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54781 event pairs, 1305 based on Foata normal form. 16/9035 useless extension candidates. Maximal degree in co-relation 87463. Up to 8568 conditions per place. [2024-06-14 12:38:02,601 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 587 selfloop transitions, 192 changer transitions 0/782 dead transitions. [2024-06-14 12:38:02,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 782 transitions, 14131 flow [2024-06-14 12:38:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:38:02,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 12:38:02,603 INFO L175 Difference]: Start difference. First operand has 506 places, 755 transitions, 11995 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:38:02,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 782 transitions, 14131 flow [2024-06-14 12:38:09,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 782 transitions, 13997 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:09,451 INFO L231 Difference]: Finished difference. Result has 510 places, 755 transitions, 12253 flow [2024-06-14 12:38:09,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11861, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12253, PETRI_PLACES=510, PETRI_TRANSITIONS=755} [2024-06-14 12:38:09,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 466 predicate places. [2024-06-14 12:38:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 755 transitions, 12253 flow [2024-06-14 12:38:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:09,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:38:09,452 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:09,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1241658963, now seen corresponding path program 4 times [2024-06-14 12:38:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:09,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041609737] [2024-06-14 12:38:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041609737] [2024-06-14 12:38:10,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041609737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:10,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:10,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:10,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417170714] [2024-06-14 12:38:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:10,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:10,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:10,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 755 transitions, 12253 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:10,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:10,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:10,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:13,875 INFO L124 PetriNetUnfolderBase]: 5740/8946 cut-off events. [2024-06-14 12:38:13,876 INFO L125 PetriNetUnfolderBase]: For 1731368/1731386 co-relation queries the response was YES. [2024-06-14 12:38:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88089 conditions, 8946 events. 5740/8946 cut-off events. For 1731368/1731386 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 55008 event pairs, 1371 based on Foata normal form. 15/8944 useless extension candidates. Maximal degree in co-relation 87865. Up to 8271 conditions per place. [2024-06-14 12:38:14,045 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 620 selfloop transitions, 121 changer transitions 0/783 dead transitions. [2024-06-14 12:38:14,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 783 transitions, 14105 flow [2024-06-14 12:38:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:38:14,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:38:14,046 INFO L175 Difference]: Start difference. First operand has 510 places, 755 transitions, 12253 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:38:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 783 transitions, 14105 flow [2024-06-14 12:38:20,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 783 transitions, 13740 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:20,941 INFO L231 Difference]: Finished difference. Result has 510 places, 757 transitions, 12184 flow [2024-06-14 12:38:20,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11888, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12184, PETRI_PLACES=510, PETRI_TRANSITIONS=757} [2024-06-14 12:38:20,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 466 predicate places. [2024-06-14 12:38:20,942 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 757 transitions, 12184 flow [2024-06-14 12:38:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:20,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:38:20,943 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:20,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1456729481, now seen corresponding path program 5 times [2024-06-14 12:38:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:20,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579427138] [2024-06-14 12:38:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579427138] [2024-06-14 12:38:22,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579427138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:22,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:22,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107321212] [2024-06-14 12:38:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:22,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 757 transitions, 12184 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:22,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:25,352 INFO L124 PetriNetUnfolderBase]: 5752/8964 cut-off events. [2024-06-14 12:38:25,353 INFO L125 PetriNetUnfolderBase]: For 1732785/1732791 co-relation queries the response was YES. [2024-06-14 12:38:25,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88207 conditions, 8964 events. 5752/8964 cut-off events. For 1732785/1732791 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55215 event pairs, 1693 based on Foata normal form. 5/8956 useless extension candidates. Maximal degree in co-relation 87982. Up to 8519 conditions per place. [2024-06-14 12:38:25,521 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 632 selfloop transitions, 109 changer transitions 0/783 dead transitions. [2024-06-14 12:38:25,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 783 transitions, 13822 flow [2024-06-14 12:38:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:38:25,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:38:25,523 INFO L175 Difference]: Start difference. First operand has 510 places, 757 transitions, 12184 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:38:25,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 783 transitions, 13822 flow [2024-06-14 12:38:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 783 transitions, 13603 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:32,292 INFO L231 Difference]: Finished difference. Result has 512 places, 761 transitions, 12258 flow [2024-06-14 12:38:32,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11969, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12258, PETRI_PLACES=512, PETRI_TRANSITIONS=761} [2024-06-14 12:38:32,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 468 predicate places. [2024-06-14 12:38:32,292 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 761 transitions, 12258 flow [2024-06-14 12:38:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:32,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:32,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:38:32,293 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:32,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash 951474065, now seen corresponding path program 9 times [2024-06-14 12:38:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572813201] [2024-06-14 12:38:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:32,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:33,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:33,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572813201] [2024-06-14 12:38:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572813201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:33,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:33,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:33,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260295121] [2024-06-14 12:38:33,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:33,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:33,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 761 transitions, 12258 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) [2024-06-14 12:38:33,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:33,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:33,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:36,234 INFO L124 PetriNetUnfolderBase]: 5868/9115 cut-off events. [2024-06-14 12:38:36,234 INFO L125 PetriNetUnfolderBase]: For 1714143/1714159 co-relation queries the response was YES. [2024-06-14 12:38:36,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89648 conditions, 9115 events. 5868/9115 cut-off events. For 1714143/1714159 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 55896 event pairs, 1283 based on Foata normal form. 16/9123 useless extension candidates. Maximal degree in co-relation 89423. Up to 8590 conditions per place. [2024-06-14 12:38:36,405 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 645 selfloop transitions, 147 changer transitions 0/834 dead transitions. [2024-06-14 12:38:36,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 834 transitions, 15185 flow [2024-06-14 12:38:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:38:36,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:38:36,406 INFO L175 Difference]: Start difference. First operand has 512 places, 761 transitions, 12258 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:38:36,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 834 transitions, 15185 flow [2024-06-14 12:38:43,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 834 transitions, 14967 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:43,440 INFO L231 Difference]: Finished difference. Result has 519 places, 812 transitions, 13535 flow [2024-06-14 12:38:43,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12066, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13535, PETRI_PLACES=519, PETRI_TRANSITIONS=812} [2024-06-14 12:38:43,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 475 predicate places. [2024-06-14 12:38:43,440 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 812 transitions, 13535 flow [2024-06-14 12:38:43,441 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) [2024-06-14 12:38:43,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:43,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:38:43,441 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash 910544991, now seen corresponding path program 10 times [2024-06-14 12:38:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:43,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427117297] [2024-06-14 12:38:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:44,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427117297] [2024-06-14 12:38:44,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427117297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:44,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:44,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569798496] [2024-06-14 12:38:44,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:44,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:44,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 812 transitions, 13535 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) [2024-06-14 12:38:44,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:44,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:44,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:47,434 INFO L124 PetriNetUnfolderBase]: 5878/9134 cut-off events. [2024-06-14 12:38:47,434 INFO L125 PetriNetUnfolderBase]: For 1749353/1749369 co-relation queries the response was YES. [2024-06-14 12:38:47,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90991 conditions, 9134 events. 5878/9134 cut-off events. For 1749353/1749369 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 56146 event pairs, 1379 based on Foata normal form. 18/9147 useless extension candidates. Maximal degree in co-relation 90762. Up to 8661 conditions per place. [2024-06-14 12:38:47,588 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 645 selfloop transitions, 150 changer transitions 0/837 dead transitions. [2024-06-14 12:38:47,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 837 transitions, 15326 flow [2024-06-14 12:38:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:38:47,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:38:47,590 INFO L175 Difference]: Start difference. First operand has 519 places, 812 transitions, 13535 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:38:47,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 837 transitions, 15326 flow [2024-06-14 12:38:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 837 transitions, 15170 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:53,704 INFO L231 Difference]: Finished difference. Result has 525 places, 816 transitions, 13822 flow [2024-06-14 12:38:53,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13822, PETRI_PLACES=525, PETRI_TRANSITIONS=816} [2024-06-14 12:38:53,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 481 predicate places. [2024-06-14 12:38:53,705 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 816 transitions, 13822 flow [2024-06-14 12:38:53,705 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) [2024-06-14 12:38:53,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:53,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:53,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:38:53,706 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:53,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1066765235, now seen corresponding path program 11 times [2024-06-14 12:38:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796968463] [2024-06-14 12:38:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:54,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:54,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796968463] [2024-06-14 12:38:54,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796968463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:54,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:54,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963606373] [2024-06-14 12:38:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:54,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:54,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 816 transitions, 13822 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) [2024-06-14 12:38:54,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:54,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:54,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:57,514 INFO L124 PetriNetUnfolderBase]: 5912/9176 cut-off events. [2024-06-14 12:38:57,514 INFO L125 PetriNetUnfolderBase]: For 1799623/1799637 co-relation queries the response was YES. [2024-06-14 12:38:57,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92352 conditions, 9176 events. 5912/9176 cut-off events. For 1799623/1799637 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 56263 event pairs, 1268 based on Foata normal form. 16/9191 useless extension candidates. Maximal degree in co-relation 92121. Up to 8340 conditions per place. [2024-06-14 12:38:57,828 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 593 selfloop transitions, 216 changer transitions 0/851 dead transitions. [2024-06-14 12:38:57,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 851 transitions, 16294 flow [2024-06-14 12:38:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:38:57,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:38:57,829 INFO L175 Difference]: Start difference. First operand has 525 places, 816 transitions, 13822 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:38:57,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 851 transitions, 16294 flow [2024-06-14 12:39:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 851 transitions, 16020 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:05,831 INFO L231 Difference]: Finished difference. Result has 527 places, 825 transitions, 14268 flow [2024-06-14 12:39:05,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13556, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14268, PETRI_PLACES=527, PETRI_TRANSITIONS=825} [2024-06-14 12:39:05,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 483 predicate places. [2024-06-14 12:39:05,832 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 825 transitions, 14268 flow [2024-06-14 12:39:05,832 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) [2024-06-14 12:39:05,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:05,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:05,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:39:05,832 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1123329111, now seen corresponding path program 4 times [2024-06-14 12:39:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048530841] [2024-06-14 12:39:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:06,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048530841] [2024-06-14 12:39:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048530841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:06,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996164047] [2024-06-14 12:39:06,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:06,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:06,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:06,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:06,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:06,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 825 transitions, 14268 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) [2024-06-14 12:39:06,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:06,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:06,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:09,804 INFO L124 PetriNetUnfolderBase]: 5917/9189 cut-off events. [2024-06-14 12:39:09,804 INFO L125 PetriNetUnfolderBase]: For 1773670/1773674 co-relation queries the response was YES. [2024-06-14 12:39:09,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92933 conditions, 9189 events. 5917/9189 cut-off events. For 1773670/1773674 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 56584 event pairs, 1762 based on Foata normal form. 3/9187 useless extension candidates. Maximal degree in co-relation 92703. Up to 8906 conditions per place. [2024-06-14 12:39:10,117 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 773 selfloop transitions, 34 changer transitions 0/849 dead transitions. [2024-06-14 12:39:10,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 849 transitions, 16086 flow [2024-06-14 12:39:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:39:10,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:39:10,118 INFO L175 Difference]: Start difference. First operand has 527 places, 825 transitions, 14268 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:39:10,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 849 transitions, 16086 flow [2024-06-14 12:39:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 849 transitions, 15729 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:17,694 INFO L231 Difference]: Finished difference. Result has 528 places, 828 transitions, 14105 flow [2024-06-14 12:39:17,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13915, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14105, PETRI_PLACES=528, PETRI_TRANSITIONS=828} [2024-06-14 12:39:17,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 484 predicate places. [2024-06-14 12:39:17,694 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 828 transitions, 14105 flow [2024-06-14 12:39:17,695 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) [2024-06-14 12:39:17,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:17,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:39:17,695 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:17,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1067064137, now seen corresponding path program 4 times [2024-06-14 12:39:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535009448] [2024-06-14 12:39:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:18,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:18,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535009448] [2024-06-14 12:39:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535009448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:18,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737460353] [2024-06-14 12:39:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:18,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:18,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:39:18,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 828 transitions, 14105 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:39:18,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:39:18,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:21,591 INFO L124 PetriNetUnfolderBase]: 6032/9311 cut-off events. [2024-06-14 12:39:21,592 INFO L125 PetriNetUnfolderBase]: For 1761048/1761050 co-relation queries the response was YES. [2024-06-14 12:39:21,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92748 conditions, 9311 events. 6032/9311 cut-off events. For 1761048/1761050 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 56801 event pairs, 1829 based on Foata normal form. 3/9313 useless extension candidates. Maximal degree in co-relation 92519. Up to 9147 conditions per place. [2024-06-14 12:39:21,743 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 780 selfloop transitions, 70 changer transitions 0/853 dead transitions. [2024-06-14 12:39:21,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 853 transitions, 16267 flow [2024-06-14 12:39:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:39:21,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:39:21,744 INFO L175 Difference]: Start difference. First operand has 528 places, 828 transitions, 14105 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:39:21,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 853 transitions, 16267 flow [2024-06-14 12:39:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 853 transitions, 16119 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:28,781 INFO L231 Difference]: Finished difference. Result has 530 places, 834 transitions, 14265 flow [2024-06-14 12:39:28,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13957, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14265, PETRI_PLACES=530, PETRI_TRANSITIONS=834} [2024-06-14 12:39:28,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 486 predicate places. [2024-06-14 12:39:28,782 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 834 transitions, 14265 flow [2024-06-14 12:39:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:39:28,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:28,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:39:28,783 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1123209141, now seen corresponding path program 5 times [2024-06-14 12:39:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960463607] [2024-06-14 12:39:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:29,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:29,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960463607] [2024-06-14 12:39:29,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960463607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:29,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:29,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101650641] [2024-06-14 12:39:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:29,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:29,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:29,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 834 transitions, 14265 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) [2024-06-14 12:39:29,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:29,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:29,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:32,668 INFO L124 PetriNetUnfolderBase]: 5943/9225 cut-off events. [2024-06-14 12:39:32,669 INFO L125 PetriNetUnfolderBase]: For 1805626/1805630 co-relation queries the response was YES. [2024-06-14 12:39:32,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93220 conditions, 9225 events. 5943/9225 cut-off events. For 1805626/1805630 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 56781 event pairs, 1765 based on Foata normal form. 3/9223 useless extension candidates. Maximal degree in co-relation 92990. Up to 8890 conditions per place. [2024-06-14 12:39:32,825 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 748 selfloop transitions, 67 changer transitions 0/859 dead transitions. [2024-06-14 12:39:32,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 859 transitions, 16435 flow [2024-06-14 12:39:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:39:32,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:39:32,826 INFO L175 Difference]: Start difference. First operand has 530 places, 834 transitions, 14265 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:39:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 859 transitions, 16435 flow